Merge pull request #25 from SCS-ASSE-FS21-Group1/dev

Deployment 0.0.1

.deployment/docker-compose.yml

@@ -0,0 +1,108 @@
+version: "3.0"
+
+services:
+    reverse-proxy:
+        image: traefik:v2.1.3
+        command:
+            - --entrypoints.web.address=:80
+            - --entrypoints.websecure.address=:443
+            - --providers.docker=true
+            - --certificatesResolvers.le.acme.httpChallenge.entryPoint=web
+            - --certificatesresolvers.le.acme.email=martin.eigenmann@unisg.ch
+            - --certificatesresolvers.le.acme.storage=/acme.json
+            - --providers.docker.exposedByDefault=false
+            - --serversTransport.insecureSkipVerify=true
+        ports:
+            - "80:80"
+            - "443:443"
+        volumes:
+            - /var/run/docker.sock:/var/run/docker.sock
+            - ./acme.json:/acme.json
+        restart: unless-stopped
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.http-catchall.rule=hostregexp(`{host:.+}`)"
+            - "traefik.http.routers.http-catchall.entrypoints=web"
+            - "traefik.http.routers.http-catchall.middlewares=redirect-to-https"
+            - "traefik.http.middlewares.redirect-to-https.redirectscheme.scheme=https"
+
+    tapas-tasks:
+        image: openjdk
+        command: "java -jar /data/tapas-tasks-0.0.1-SNAPSHOT.jar"
+        restart: unless-stopped
+        volumes:
+            - ./:/data/
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.tapas-tasks.rule=Host(`tapas-tasks.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.tapas-tasks.service=tapas-tasks"
+            - "traefik.http.services.tapas-tasks.loadbalancer.server.port=8081"
+            - "traefik.http.routers.tapas-tasks.tls=true"
+            - "traefik.http.routers.tapas-tasks.entryPoints=web,websecure"
+            - "traefik.http.routers.tapas-tasks.tls.certresolver=le"
+
+    assignment:
+        image: openjdk
+        command: "java -jar /data/assignment-0.0.1.jar"
+        restart: unless-stopped
+        volumes:
+            - ./:/data/
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.assignment.rule=Host(`assignment.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.assignment.service=assignment"
+            - "traefik.http.services.assignment.loadbalancer.server.port=8082"
+            - "traefik.http.routers.assignment.tls=true"
+            - "traefik.http.routers.assignment.entryPoints=web,websecure"
+            - "traefik.http.routers.assignment.tls.certresolver=le"
+
+    executor-pool:
+        image: openjdk
+        command: "java -jar /data/executor-pool-0.0.1.jar"
+        restart: unless-stopped
+        volumes:
+            - ./:/data/
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.executor-pool.rule=Host(`executor-pool.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.executor-pool.service=executor-pool"
+            - "traefik.http.services.executor-pool.loadbalancer.server.port=8083"
+            - "traefik.http.routers.executor-pool.tls=true"
+            - "traefik.http.routers.executor-pool.entryPoints=web,websecure"
+            - "traefik.http.routers.executor-pool.tls.certresolver=le"
+
+    executor1:
+        image: openjdk
+        command: "java -jar /data/executor1-0.0.1.jar"
+        restart: unless-stopped
+        depends_on:
+            - executor-pool
+            - assignment
+        volumes:
+            - ./:/data/
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.executor1.rule=Host(`executor1.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.executor1.service=executor1"
+            - "traefik.http.services.executor1.loadbalancer.server.port=8084"
+            - "traefik.http.routers.executor1.tls=true"
+            - "traefik.http.routers.executor1.entryPoints=web,websecure"
+            - "traefik.http.routers.executor1.tls.certresolver=le"
+
+    executor2:
+        image: openjdk
+        command: "java -jar /data/executor2-0.0.1.jar"
+        restart: unless-stopped
+        depends_on:
+            - executor-pool
+            - assignment
+        volumes:
+            - ./:/data/
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.executor2.rule=Host(`executor2.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.executor2.service=executor2"
+            - "traefik.http.services.executor2.loadbalancer.server.port=8085"
+            - "traefik.http.routers.executor2.tls=true"
+            - "traefik.http.routers.executor2.entryPoints=web,websecure"
+            - "traefik.http.routers.executor2.tls.certresolver=le"

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+end_of_line = lf
+insert_final_newline = true

.github/workflows/build-and-deploy.yml

@@ -4,78 +4,97 @@
 name: Build and Deploy
 
 on:
-  push:
+    push:
-    branches:
+        branches:
-      - main
+            - main
+
+    workflow_dispatch:
 
 jobs:
-  build:
+    build:
-    runs-on: ubuntu-latest
+        runs-on: ubuntu-latest
-    permissions:
+        permissions:
-      contents: read
+            contents: read
 
-    steps:
+        steps:
-    - uses: actions/checkout@v2
+            - uses: actions/checkout@v2
-    - name: Set up JDK 11
+            - name: Set up JDK 11
-      uses: actions/setup-java@v2
+              uses: actions/setup-java@v2
-      with:
+              with:
-        java-version: '11'
+                  java-version: "11"
-        distribution: 'adopt'
+                  distribution: "adopt"
 
+            - run: mkdir ./target
 
-    - run: mkdir ./target
+            - name: Cache Maven packages
+              uses: actions/cache@v1
+              with:
+                  path: ~/.m2
+                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+                  restore-keys: ${{ runner.os }}-m2
 
-    - name: Build with Maven
+            - name: Build with Maven
-      run: mvn -f tapas-tasks/pom.xml --batch-mode --update-snapshots verify
+              run: mvn -f assignment/pom.xml --batch-mode --update-snapshots verify
-    - run: cp ./tapas-tasks/target/tapas-tasks-0.0.1-SNAPSHOT.jar ./target  
+            - run: cp ./assignment/target/assignment-0.0.1-SNAPSHOT.jar ./target
 
-    - name: Build with Maven
+            - name: Build with Maven
-      run: mvn -f app/pom.xml --batch-mode --update-snapshots verify
+              run: mvn -f executor-pool/pom.xml --batch-mode --update-snapshots verify
-    - run: cp ./app/target/app-0.1.0.jar ./target  
+            - run: cp ./executor-pool/target/executor-pool-0.0.1.jar ./target
 
-    - run: cp docker-compose.yml ./target
+            - name: Build with Maven
-    - name: Archive artifacts
+              run: mvn -f executorBase/pom.xml --batch-mode --update-snapshots install
-      uses: actions/upload-artifact@v1
-      with: 
-        name: app
-        path: ./target/
 
+            - name: Build with Maven
+              run: mvn -f executor1/pom.xml --batch-mode --update-snapshots verify
+            - run: cp ./executor1/target/executor1-0.0.1.jar ./target
 
-  deploy:
+            - name: Build with Maven
-    runs-on: ubuntu-latest
+              run: mvn -f executor2/pom.xml --batch-mode --update-snapshots verify
-    needs: [build, ]
+            - run: cp ./executor2/target/executor2-0.0.1.jar ./target
-    steps:
-    - name: Download app artifacts
-      uses: actions/download-artifact@v1
-      with:
-        name: app
-    - name: Copy host via scp
-      uses: appleboy/scp-action@master
-      env:
-        HOST: ${{ secrets.SSH_HOST }}
-        USERNAME: ${{ secrets.SSH_USER }}
-        PORT: 22
-        KEY: ${{ secrets.SSH_PRIVATE_KEY }}  
-      with:
-        source: "app/*"
-        target: "/home/${{ secrets.SSH_USER }}/"
-        strip_components: 1
-        rm: false
-        overwrite: true
 
-    - name: Executing remote command
+            - name: Build with Maven
-      uses: appleboy/ssh-action@master
+              run: mvn -f tapas-tasks/pom.xml --batch-mode --update-snapshots verify
-      with:
+            - run: cp ./tapas-tasks/target/tapas-tasks-0.0.1.jar ./target
-        host: ${{ secrets.SSH_HOST }}
-        USERNAME: ${{ secrets.SSH_USER }}
-        PORT: 22
-        KEY: ${{ secrets.SSH_PRIVATE_KEY }}
-        script: |
-          cd /home/${{ secrets.SSH_USER }}/
-          touch acme.json
-          sudo chmod 0600 acme.json
-          sudo echo "PUB_IP=$(wget -qO- http://ipecho.net/plain | xargs echo)" | sed -e 's/\./-/g' > .env
-          sudo docker-compose up -d
 
+            - run: cp ./.deployment/docker-compose.yml ./target
+            - name: Archive artifacts
+              uses: actions/upload-artifact@v1
+              with:
+                  name: app
+                  path: ./target/
 
+    deploy:
+        runs-on: ubuntu-latest
+        needs: [build]
+        steps:
+            - name: Download app artifacts
+              uses: actions/download-artifact@v1
+              with:
+                  name: app
+            - name: Copy host via scp
+              uses: appleboy/scp-action@master
+              env:
+                  HOST: ${{ secrets.SSH_HOST }}
+                  USERNAME: ${{ secrets.SSH_USER }}
+                  PORT: 22
+                  KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+              with:
+                  source: "app/*"
+                  target: "/home/${{ secrets.SSH_USER }}/"
+                  strip_components: 1
+                  rm: false
+                  overwrite: true
 
+            - name: Executing remote command
+              uses: appleboy/ssh-action@master
+              with:
+                  host: ${{ secrets.SSH_HOST }}
+                  USERNAME: ${{ secrets.SSH_USER }}
+                  PORT: 22
+                  KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+                  script: |
+                      cd /home/${{ secrets.SSH_USER }}/
+                      touch acme.json
+                      sudo chmod 0600 acme.json
+                      sudo echo "PUB_IP=$(wget -qO- http://ipecho.net/plain | xargs echo)" | sed -e 's/\./-/g' > .env
+                      sudo docker-compose up -d

.github/workflows/ci.assignment.yml

@@ -0,0 +1,41 @@
+name: CI Assignment
+on:
+  push:
+    branches: [main, dev]
+    paths:
+      - "assignment/**"
+  pull_request:
+    branches: [main, dev]
+    paths:
+      - "assignment/**"
+
+  workflow_dispatch:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache Maven packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Build and analyze
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        run: mvn -f assignment/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-assignment

.github/workflows/ci.executor-pool.yml

@@ -0,0 +1,41 @@
+name: CI Executor Pool
+on:
+  push:
+    branches: [main, dev]
+    paths:
+      - "executor-pool/**"
+  pull_request:
+    branches: [main, dev]
+    paths:
+      - "executor-pool/**"
+
+  workflow_dispatch:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache Maven packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Build and analyze
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        run: mvn -f executor-pool/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-executor-pool

.github/workflows/ci.executor1.yml

@@ -0,0 +1,45 @@
+name: CI Executor 1
+on:
+    push:
+        branches: [main, dev]
+        paths:
+            - "executor-base/**"
+            - "executor1/**"
+    pull_request:
+        branches: [main, dev]
+        paths:
+            - "executor-base/**"
+            - "executor1/**"
+
+    workflow_dispatch:
+jobs:
+    build:
+        name: Build
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+              with:
+                  fetch-depth: 0
+            - name: Set up JDK 11
+              uses: actions/setup-java@v1
+              with:
+                  java-version: 11
+            - name: Cache SonarCloud packages
+              uses: actions/cache@v1
+              with:
+                  path: ~/.sonar/cache
+                  key: ${{ runner.os }}-sonar
+                  restore-keys: ${{ runner.os }}-sonar
+            - name: Cache Maven packages
+              uses: actions/cache@v1
+              with:
+                  path: ~/.m2
+                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+                  restore-keys: ${{ runner.os }}-m2
+            - name: Build executorBase
+              run: mvn -f executor-base/pom.xml -B install
+            - name: Build and analyze
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+              run: mvn -f executor1/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-executor1

.github/workflows/ci.executor2.yml

@@ -0,0 +1,45 @@
+name: CI Executor 2
+on:
+    push:
+        branches: [main, dev]
+        paths:
+            - "executor-base/**"
+            - "executor2/**"
+    pull_request:
+        branches: [main, dev]
+        paths:
+            - "executor-base/**"
+            - "executor2/**"
+
+    workflow_dispatch:
+jobs:
+    build:
+        name: Build
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+              with:
+                  fetch-depth: 0
+            - name: Set up JDK 11
+              uses: actions/setup-java@v1
+              with:
+                  java-version: 11
+            - name: Cache SonarCloud packages
+              uses: actions/cache@v1
+              with:
+                  path: ~/.sonar/cache
+                  key: ${{ runner.os }}-sonar
+                  restore-keys: ${{ runner.os }}-sonar
+            - name: Cache Maven packages
+              uses: actions/cache@v1
+              with:
+                  path: ~/.m2
+                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+                  restore-keys: ${{ runner.os }}-m2
+            - name: Build executorBase
+              run: mvn -f executor-base/pom.xml -B install
+            - name: Build and analyze
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+              run: mvn -f executor2/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-executor2

.github/workflows/ci.tapas-tasks.yml

@@ -0,0 +1,41 @@
+name: CI Tasks
+on:
+  push:
+    branches: [main, dev]
+    paths:
+      - "tapas-tasks/**"
+  pull_request:
+    branches: [main, dev]
+    paths:
+      - "tapas-tasks/**"
+
+  workflow_dispatch:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache Maven packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Build and analyze
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        run: mvn -f tapas-tasks/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-tasks

.gitignore

@@ -31,3 +31,7 @@ build/
 
 ### VS Code ###
 .vscode/
+
+### Mac ###
+.DS_Store
+

README.md

@@ -1,62 +1,113 @@
 # TAPAS
+
 This is the main GitHub project for your implementation of the TAPAS application.
 
+## Run application in developent
+
+We use Docker & docker-compose in development to easly start all the microservices and other needed application (db's, message-broker's) at once. All microservices have hot-reloads enabled by default!
+
+#### Start
+
+```
+docker-compose up
+```
+
+#### Rebuild container
+
+```
+docker-compose up --build
+```
+
+#### Start detached
+
+```
+docker-compose up -d
+```
+
+#### Stop detached
+
+```
+docker-compose down
+```
+
+## Available Services
+
+Ports and debug ports of each service are listed below:
+
+| Name               | Port | Debug Port |
+| ------------------ | ---- | ---------- |
+| Tasklist           | 8081 | 5005       |
+| Assignment Service | 8082 | 5006       |
+| Executor Pool      | 8083 | 5007       |
+| Executor 1         | 8084 | 5008       |
+| Executor 2         | 8085 | 5009       |
+
 ## Project Structure
+
 This project is structured as follows:
-* [tapas-tasks](tapas-tasks): standalone project for the Tapas-Tasks micro-service (Spring Boot project)
+
-  * [tapas-tasks/src](tapas-tasks/src): source code of the project (following the Hexagonal Architecture)
+- [tapas-tasks](tapas-tasks): standalone project for the Tapas-Tasks micro-service (Spring Boot project)
-  * [tapas-tasks/pom.xml](tapas-tasks\pom.xml): Maven pom-file
+  - [tapas-tasks/src](tapas-tasks/src): source code of the project (following the Hexagonal Architecture)
-* [app](app): folder as placeholder for a second micro-service (Spring Boot project)
+  - [tapas-tasks/pom.xml](tapas-tasks\pom.xml): Maven pom-file
-* [docker-compose.yml](docker-compose.yml): Docker Compose configuration file for all services
+- [app](app): folder as placeholder for a second micro-service (Spring Boot project)
-* [.github/workflows/build-and-deploy.yml](.github/workflows/build-and-deploy.yml): GitHub actions script (CI/CD workflow)
+- [docker-compose.yml](docker-compose.yml): Docker Compose configuration file for all services
+- [.github/workflows/build-and-deploy.yml](.github/workflows/build-and-deploy.yml): GitHub actions script (CI/CD workflow)
 
 ## How to Add a New Service with Spring Boot
 
 ### Create a new Spring Boot project
 
-* Recommended: use [Spring Initialzr](https://start.spring.io/) (Maven, Spring Boot 2.5.5, Jar, Java 11, dependencies as needed)
+- Recommended: use [Spring Initialzr](https://start.spring.io/) (Maven, Spring Boot 2.5.5, Jar, Java 11, dependencies as needed)
-* Set the Spring application properties for your service (e.g., port of the web server) in `src/resources/application.properties`
+- Set the Spring application properties for your service (e.g., port of the web server) in `src/resources/application.properties`
 
 ### Update the Docker Compose file
+
 Your TAPAS application is a multi-container Docker application ran with [Docker Compose](https://docs.docker.com/compose/).
 To add your newly created service to the Docker Compose configuration file, you need to create a new service
 definition in [docker-compose.yml](docker-compose.yml):
-* copy and edit the `tapas-tasks` service definition from [lines 29-42](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L29-L42)
+
-* change `command` (see [line 31](https://github.com/scs-asse/tapas/blob/main/docker-compose.yml#L31))
+- copy and edit the `tapas-tasks` service definition from [lines 29-42](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L29-L42)
-to use the name of the JAR file generated by Maven for your service
+- change `command` (see [line 31](https://github.com/scs-asse/tapas/blob/main/docker-compose.yml#L31))
-  * note: if you change the version of your service, you need to update this line to reflect the change 
+  to use the name of the JAR file generated by Maven for your service
-* update the Traefik label names to reflect the name of your new service (see [lines 37-42](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L37-L42))
+  - note: if you change the version of your service, you need to update this line to reflect the change
-  * e.g., change `traefik.http.routers.tapas-tasks.rule` to `traefik.http.routers.<new-service-name>.rule`
+- update the Traefik label names to reflect the name of your new service (see [lines 37-42](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L37-L42))
-* update the Traefik `rule` (see [line 37](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L37)) with the name of your new service: ``Host(`<new-service-name>.${PUB_IP}.nip.io`)``
+  - e.g., change `traefik.http.routers.tapas-tasks.rule` to `traefik.http.routers.<new-service-name>.rule`
-* update the Traefik `port` (see [line 39](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L39)) with the port configured for your new service
+- update the Traefik `rule` (see [line 37](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L37)) with the name of your new service: `` Host(`<new-service-name>.${PUB_IP}.nip.io`) ``
+- update the Traefik `port` (see [line 39](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/docker-compose.yml#L39)) with the port configured for your new service
 
 ### Update the GitHub Actions Workflow
+
 This project uses GitHub Actions to build and deploy your TAPAS application whenever a new commit is
 pushed on the `main` branch. You can add your new service to the GitHub Actions workflow defined in
 [.github/workflows/build-and-deploy.yml](.github/workflows/build-and-deploy.yml):
-* copy and edit the definition for `tapas-tasks` from [line 28-30](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/.github/workflows/build-and-deploy.yml#L28-L30)
+
-* update the `mvn` command used to build your service to point to the `pom.xml` file of your new service (see [line 29](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/.github/workflows/build-and-deploy.yml#L29))
+- copy and edit the definition for `tapas-tasks` from [line 28-30](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/.github/workflows/build-and-deploy.yml#L28-L30)
-* update the `cp` command to point to the JAR file of your new service directive (see [line 30](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/.github/workflows/build-and-deploy.yml#L30)) 
+- update the `mvn` command used to build your service to point to the `pom.xml` file of your new service (see [line 29](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/.github/workflows/build-and-deploy.yml#L29))
-  * note you will need to update the complete file path (folder structure and JAR name)
+- update the `cp` command to point to the JAR file of your new service directive (see [line 30](https://github.com/scs-asse/tapas/blob/424a5f5aa2d6524acfe95d93000571884ed9d66f/.github/workflows/build-and-deploy.yml#L30))
+  - note you will need to update the complete file path (folder structure and JAR name)
 
 ### How to Run Your Service Locally
+
 You can run and test your micro-service on your local machine just like a regular Maven project:
-* Run from IntelliJ:
+
-  * Reload *pom.xml* if necessary
+- Run from IntelliJ:
-  * Run the micro-service's main class from IntelliJ for all required projects
+  - Reload _pom.xml_ if necessary
-* Use Maven to run from the command line:
+  - Run the micro-service's main class from IntelliJ for all required projects
+- Use Maven to run from the command line:
+
 ```shell
 mvn spring-boot:run
 ```
 
 ## How to Deploy on your VM
+
 1. Start your Ubuntu VM on Switch.
-   * VM shuts down automatically at 2 AM
+   - VM shuts down automatically at 2 AM
-   * Group admins can do this via https://engines.switch.ch/horizon
+   - Group admins can do this via https://engines.switch.ch/horizon
-2. Push new code to the *main* branch
+2. Push new code to the _main_ branch
-   * Check the status of the workflow on the *Actions* page of the GitHub project
+   - Check the status of the workflow on the _Actions_ page of the GitHub project
-   * We recommend to test your project locally before pushing the code to GitHub. The GitHub Organizations
+   - We recommend to test your project locally before pushing the code to GitHub. The GitHub Organizations
-    used in the course are on a free tier plan, which comes with [various limits](https://github.com/pricing).
+     used in the course are on a free tier plan, which comes with [various limits](https://github.com/pricing).
 3. Open in your browser `https://app.<server-ip>.nip.io`
 
 For the server IP address (see below), you should use dashes instead of dots, e.g.: `127.0.0.1` becomes `127-0-0-1`.
@@ -64,19 +115,21 @@ For the server IP address (see below), you should use dashes instead of dots, e.
 ## VM Configurations
 
 Specs (we can upgrade if needed):
-* 1 CPU
-* 2 GB RAM
-* 20 GB HD
-* Ubuntu 20.04
 
-| Name | Server IP |
+- 1 CPU
-|-------|-----------|
+- 2 GB RAM
-|SCS-ASSE-VM-Group1|86.119.35.40|
+- 20 GB HD
-|SCS-ASSE-VM-Group2|86.119.35.213|
+- Ubuntu 20.04
-|SCS-ASSE-VM-Group3|86.119.34.242|
+
-|SCS-ASSE-VM-Group4|86.119.35.199|
+| Name               | Server IP     |
-|SCS-ASSE-VM-Group5|86.119.35.72|
+| ------------------ | ------------- |
+| SCS-ASSE-VM-Group1 | 86.119.35.40  |
+| SCS-ASSE-VM-Group2 | 86.119.35.213 |
+| SCS-ASSE-VM-Group3 | 86.119.34.242 |
+| SCS-ASSE-VM-Group4 | 86.119.35.199 |
+| SCS-ASSE-VM-Group5 | 86.119.35.72  |
 
 ## Architecture Decision Records
+
 We recommend you to use [adr-tools](https://github.com/npryce/adr-tools) to manage your ADRs here in
 this GitHub project in a dedicated folder. The tool works best on a Mac OS or Linux machine.

app/pom.xml

@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-
-    <groupId>com.dockerforjavadevelopers</groupId>
-    <artifactId>app</artifactId>
-    <version>0.1.0</version>
-
-    <parent>
-        <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.2.1.RELEASE</version>
-    </parent>
-
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-web</artifactId>
-        </dependency>
-
-		<dependency>
-		    <groupId>junit</groupId>
-		    <artifactId>junit</artifactId>
-		    <version>4.13.1</version>
-		    <scope>test</scope>
-		</dependency>
-        
-    </dependencies>
-
-    <properties>
-        <start-class>com.dockerforjavadevelopers.hello.Application</start-class>
-    </properties>
-
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-            </plugin>
-        </plugins>
-    </build>
-
-</project>

app/src/main/java/com/app/hello/Application.java

@@ -1,19 +0,0 @@
-package com.dockerforjavadevelopers.hello;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.context.ApplicationContext;
-import org.springframework.context.annotation.ComponentScan;
-import org.springframework.context.annotation.Configuration;
-
-@Configuration
-@EnableAutoConfiguration
-@ComponentScan
-public class Application {
-    
-    public static void main(String[] args) {
-        ApplicationContext ctx = SpringApplication.run(Application.class, args);
-        
-    }
-
-}

app/src/test/java/com/app/hello/DummyTest.java

@@ -1,13 +0,0 @@
-package com.dockerforjavadevelopers.hello;
-
-import static org.junit.Assert.*;
-
-import org.junit.Test;
-
-public class DummyTest {
-
-  @Test
-  public void aTest() {
-    assertEquals(true, true);
-  }
-}

assignment/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

assignment/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

assignment/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.2/apache-maven-3.8.2-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

assignment/Dockerfile

@@ -0,0 +1,18 @@
+FROM openjdk:11 AS development
+
+WORKDIR /opt/app
+
+# ENV SPRING_DATASOURCE_URL=jdbc:mysql://backend-db:3306/db
+
+COPY .mvn/ .mvn
+COPY mvnw pom.xml mvnw.cmd ./
+
+RUN apt-get clean && apt-get update && apt-get install dos2unix
+RUN dos2unix mvnw
+
+RUN ./mvnw dependency:go-offline
+
+COPY src /opt/app/src
+COPY *target /opt/app/target
+
+CMD ["./mvnw", "spring-boot:run", "-Dspring-boot.run.jvmArguments=\"-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005\"", "-Dspring.devtools.restart.enabled=true"]

assignment/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

assignment/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

assignment/pom.xml

@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.5</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>ch.unisg</groupId>
+	<artifactId>assignment</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>assignment</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+		<sonar.organization>scs-asse-fs21-group1</sonar.organization>
+		<sonar.host.url>https://sonarcloud.io</sonar.host.url>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+
+        <dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+        <dependency>
+            <groupId>javax.validation</groupId>
+            <artifactId>validation-api</artifactId>
+            <version>1.1.0.Final</version>
+        </dependency>
+        <dependency>
+			<groupId>javax.transaction</groupId>
+			<artifactId>javax.transaction-api</artifactId>
+			<version>1.2</version>
+		</dependency>
+
+        <dependency>
+			<groupId>org.json</groupId>
+			<artifactId>json</artifactId>
+			<version>20210307</version>
+		</dependency>
+
+
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

assignment/src/main/java/ch/unisg/assignment/AssignmentApplication.java

@@ -0,0 +1,13 @@
+package ch.unisg.assignment;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class AssignmentApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(AssignmentApplication.class, args);
+	}
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/in/web/ApplyForTaskController.java

@@ -0,0 +1,29 @@
+package ch.unisg.assignment.assignment.adapter.in.web;
+
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import ch.unisg.assignment.assignment.application.port.in.ApplyForTaskCommand;
+import ch.unisg.assignment.assignment.application.port.in.ApplyForTaskUseCase;
+import ch.unisg.assignment.assignment.domain.ExecutorInfo;
+import ch.unisg.assignment.assignment.domain.Task;
+
+@RestController
+public class ApplyForTaskController {
+    private final ApplyForTaskUseCase applyForTaskUseCase;
+
+    public ApplyForTaskController(ApplyForTaskUseCase applyForTaskUseCase) {
+        this.applyForTaskUseCase = applyForTaskUseCase;
+    }
+
+    @PostMapping(path = "/task/apply", consumes = {"application/json"})
+    public Task applyForTask(@RequestBody ExecutorInfo executorInfo) {
+
+        ApplyForTaskCommand command = new ApplyForTaskCommand(executorInfo.getExecutorType(),
+            executorInfo.getIp(), executorInfo.getPort());
+
+        return applyForTaskUseCase.applyForTask(command);
+
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/in/web/NewTaskController.java

@@ -0,0 +1,34 @@
+package ch.unisg.assignment.assignment.adapter.in.web;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import ch.unisg.assignment.assignment.application.port.in.NewTaskCommand;
+import ch.unisg.assignment.assignment.application.port.in.NewTaskUseCase;
+import ch.unisg.assignment.assignment.domain.Task;
+
+@RestController
+public class NewTaskController {
+    private final NewTaskUseCase newTaskUseCase;
+
+    public NewTaskController(NewTaskUseCase newTaskUseCase) {
+        this.newTaskUseCase = newTaskUseCase;
+    }
+
+    @PostMapping(path = "/task", consumes = {"application/json"})
+    public ResponseEntity<Void> newTaskController(@RequestBody Task task) {
+
+            NewTaskCommand command = new NewTaskCommand(task.getTaskID(), task.getTaskType());
+
+            boolean success = newTaskUseCase.addNewTaskToQueue(command);
+
+            if (success) {
+                return new ResponseEntity<>(HttpStatus.CREATED);
+            }
+            return new ResponseEntity<>(HttpStatus.CONFLICT);
+
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/in/web/TaskCompletedController.java

@@ -0,0 +1,34 @@
+package ch.unisg.assignment.assignment.adapter.in.web;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import ch.unisg.assignment.assignment.application.port.in.TaskCompletedCommand;
+import ch.unisg.assignment.assignment.application.port.in.TaskCompletedUseCase;
+import ch.unisg.assignment.assignment.domain.Task;
+
+@RestController
+public class TaskCompletedController {
+
+    private final TaskCompletedUseCase taskCompletedUseCase;
+
+    public TaskCompletedController(TaskCompletedUseCase taskCompletedUseCase) {
+        this.taskCompletedUseCase = taskCompletedUseCase;
+    }
+
+    @PostMapping(path = "/task/completed", consumes = {"application/json"})
+    public ResponseEntity<Void> addNewTaskTaskToTaskList(@RequestBody Task task) {
+
+        TaskCompletedCommand command = new TaskCompletedCommand(task.getTaskID(),
+            task.getStatus(), task.getResult());
+
+        taskCompletedUseCase.taskCompleted(command);
+
+        return new ResponseEntity<>(HttpStatus.OK);
+
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/in/web/WebControllerExceptionHandler.java

@@ -0,0 +1,31 @@
+package ch.unisg.assignment.assignment.adapter.in.web;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+import ch.unisg.assignment.common.exception.ErrorResponse;
+import ch.unisg.assignment.common.exception.InvalidIP4Exception;
+import ch.unisg.assignment.common.exception.PortOutOfRangeException;
+
+@ControllerAdvice
+public class WebControllerExceptionHandler {
+
+    @ExceptionHandler(PortOutOfRangeException.class)
+    public ResponseEntity<ErrorResponse> handleException(PortOutOfRangeException e){
+
+        ErrorResponse error = new ErrorResponse(HttpStatus.BAD_REQUEST, e.getLocalizedMessage());
+        return new ResponseEntity<>(error, error.getHttpStatus());
+
+     }
+
+     @ExceptionHandler(InvalidIP4Exception.class)
+     public ResponseEntity<ErrorResponse> handleException(InvalidIP4Exception e){
+
+         ErrorResponse error = new ErrorResponse(HttpStatus.BAD_REQUEST, e.getLocalizedMessage());
+         return new ResponseEntity<>(error, error.getHttpStatus());
+
+      }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/GetAllExecutorInExecutorPoolByTypeAdapter.java

@@ -0,0 +1,55 @@
+package ch.unisg.assignment.assignment.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.springframework.context.annotation.Primary;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.out.GetAllExecutorInExecutorPoolByTypePort;
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+
+@Component
+@Primary
+public class GetAllExecutorInExecutorPoolByTypeAdapter implements GetAllExecutorInExecutorPoolByTypePort {
+
+    @Override
+    public boolean doesExecutorTypeExist(ExecutorType type) {
+        String server = "http://127.0.0.1:8083";
+
+        Logger logger = Logger.getLogger(PublishNewTaskEventAdapter.class.getName());
+
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server + "/executor-pool/GetAllExecutorInExecutorPoolByType/" + type.getValue()))
+                .header("Content-Type", "application/json")
+                .GET()
+                .build();
+
+
+        try {
+            HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString());
+            if (response.statusCode() == HttpStatus.OK.value()) {
+                JSONArray jsonArray = new JSONArray(response.body().toString());
+                if (jsonArray.length() > 0) {
+                    return true;
+                }
+            }
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+        return false;
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishNewTaskEventAdapter.java

@@ -0,0 +1,60 @@
+package ch.unisg.assignment.assignment.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.out.NewTaskEventPort;
+import ch.unisg.assignment.assignment.domain.event.NewTaskEvent;
+
+@Component
+@Primary
+public class PublishNewTaskEventAdapter implements NewTaskEventPort {
+
+    String server = "http://127.0.0.1:8084";
+    String server2 = "http://127.0.0.1:8085";
+
+    Logger logger = Logger.getLogger(PublishNewTaskEventAdapter.class.getName());
+
+    @Override
+    public void publishNewTaskEvent(NewTaskEvent event) {
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server + "/newtask/" + event.taskType.getValue()))
+                .GET()
+                .build();
+
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+
+        HttpClient client2 = HttpClient.newHttpClient();
+        HttpRequest request2 = HttpRequest.newBuilder()
+                .uri(URI.create(server2 + "/newtask/" + event.taskType.getValue()))
+                .GET()
+                .build();
+
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishTaskAssignedEventAdapter.java

@@ -0,0 +1,50 @@
+package ch.unisg.assignment.assignment.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.JSONObject;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.out.TaskAssignedEventPort;
+import ch.unisg.assignment.assignment.domain.event.TaskAssignedEvent;
+
+@Component
+@Primary
+public class PublishTaskAssignedEventAdapter implements TaskAssignedEventPort {
+
+    String server = "http://127.0.0.1:8081";
+
+    Logger logger = Logger.getLogger(PublishTaskAssignedEventAdapter.class.getName());
+
+    @Override
+    public void publishTaskAssignedEvent(TaskAssignedEvent event) {
+
+        String body = new JSONObject()
+                  .put("taskId", event.taskID)
+                  .toString();
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server + "/tasks/assignTask"))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishTaskCompletedEventAdapter.java

@@ -0,0 +1,53 @@
+package ch.unisg.assignment.assignment.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.JSONObject;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.out.TaskCompletedEventPort;
+import ch.unisg.assignment.assignment.domain.event.TaskCompletedEvent;
+
+@Component
+@Primary
+public class PublishTaskCompletedEventAdapter implements TaskCompletedEventPort {
+
+    String server = "http://127.0.0.1:8081";
+
+    Logger logger = Logger.getLogger(PublishTaskCompletedEventAdapter.class.getName());
+
+    @Override
+    public void publishTaskCompleted(TaskCompletedEvent event) {
+
+        String body = new JSONObject()
+                  .put("taskId", event.taskID)
+                  .put("status", event.status)
+                  .put("taskResult", event.result)
+                  .toString();
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server + "/tasks/completeTask"))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/ApplyForTaskCommand.java

@@ -0,0 +1,32 @@
+package ch.unisg.assignment.assignment.application.port.in;
+
+import javax.validation.constraints.NotNull;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+import ch.unisg.assignment.assignment.domain.valueobject.IP4Adress;
+import ch.unisg.assignment.assignment.domain.valueobject.Port;
+import ch.unisg.assignment.common.SelfValidating;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
+
+@Value
+@EqualsAndHashCode(callSuper=false)
+public class ApplyForTaskCommand extends SelfValidating<ApplyForTaskCommand>{
+
+    @NotNull
+    private final ExecutorType taskType;
+
+    @NotNull
+    private final IP4Adress executorIP;
+
+
+    @NotNull
+    private final Port executorPort;
+
+    public ApplyForTaskCommand(ExecutorType taskType, IP4Adress executorIP, Port executorPort) {
+        this.taskType = taskType;
+        this.executorIP = executorIP;
+        this.executorPort = executorPort;
+        this.validateSelf();
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/ApplyForTaskUseCase.java

@@ -0,0 +1,7 @@
+package ch.unisg.assignment.assignment.application.port.in;
+
+import ch.unisg.assignment.assignment.domain.Task;
+
+public interface ApplyForTaskUseCase {
+    Task applyForTask(ApplyForTaskCommand applyForTaskCommand);
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/NewTaskCommand.java

@@ -0,0 +1,25 @@
+package ch.unisg.assignment.assignment.application.port.in;
+
+import javax.validation.constraints.NotNull;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+import ch.unisg.assignment.common.SelfValidating;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
+
+@Value
+@EqualsAndHashCode(callSuper=false)
+public class NewTaskCommand extends SelfValidating<NewTaskCommand> {
+
+    @NotNull
+    private final String taskID;
+
+    @NotNull
+    private final ExecutorType taskType;
+
+    public NewTaskCommand(String taskID, ExecutorType taskType) {
+        this.taskID = taskID;
+        this.taskType = taskType;
+        this.validateSelf();
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/NewTaskUseCase.java

@@ -0,0 +1,5 @@
+package ch.unisg.assignment.assignment.application.port.in;
+
+public interface NewTaskUseCase {
+    boolean addNewTaskToQueue(NewTaskCommand newTaskCommand);
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/TaskCompletedCommand.java

@@ -0,0 +1,29 @@
+package ch.unisg.assignment.assignment.application.port.in;
+
+import javax.validation.constraints.NotNull;
+
+import ch.unisg.assignment.common.SelfValidating;
+import lombok.EqualsAndHashCode;
+import lombok.Value;
+
+@Value
+@EqualsAndHashCode(callSuper=false)
+public class TaskCompletedCommand extends SelfValidating<TaskCompletedCommand>{
+
+    @NotNull
+    private final String taskID;
+
+    @NotNull
+    private final String taskStatus;
+
+    @NotNull
+    private final String taskResult;
+
+    public TaskCompletedCommand(String taskID, String taskStatus, String taskResult) {
+        this.taskID = taskID;
+        this.taskStatus = taskStatus;
+        this.taskResult = taskResult;
+        this.validateSelf();
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/TaskCompletedUseCase.java

@@ -0,0 +1,5 @@
+package ch.unisg.assignment.assignment.application.port.in;
+
+public interface TaskCompletedUseCase {
+    void taskCompleted(TaskCompletedCommand taskCompletedCommand);
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/GetAllExecutorInExecutorPoolByTypePort.java

@@ -0,0 +1,9 @@
+package ch.unisg.assignment.assignment.application.port.out;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+
+public interface GetAllExecutorInExecutorPoolByTypePort {
+    boolean doesExecutorTypeExist(ExecutorType type);
+}
+
+

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/NewTaskEventPort.java

@@ -0,0 +1,7 @@
+package ch.unisg.assignment.assignment.application.port.out;
+
+import ch.unisg.assignment.assignment.domain.event.NewTaskEvent;
+
+public interface NewTaskEventPort {
+    void publishNewTaskEvent(NewTaskEvent event);
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/TaskAssignedEventPort.java

@@ -0,0 +1,7 @@
+package ch.unisg.assignment.assignment.application.port.out;
+
+import ch.unisg.assignment.assignment.domain.event.TaskAssignedEvent;
+
+public interface TaskAssignedEventPort {
+    void publishTaskAssignedEvent(TaskAssignedEvent taskAssignedEvent);
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/TaskCompletedEventPort.java

@@ -0,0 +1,7 @@
+package ch.unisg.assignment.assignment.application.port.out;
+
+import ch.unisg.assignment.assignment.domain.event.TaskCompletedEvent;
+
+public interface TaskCompletedEventPort {
+    void publishTaskCompleted(TaskCompletedEvent event);
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/service/ApplyForTaskService.java

@@ -0,0 +1,34 @@
+package ch.unisg.assignment.assignment.application.service;
+
+import javax.transaction.Transactional;
+
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.in.ApplyForTaskCommand;
+import ch.unisg.assignment.assignment.application.port.in.ApplyForTaskUseCase;
+import ch.unisg.assignment.assignment.application.port.out.TaskAssignedEventPort;
+import ch.unisg.assignment.assignment.domain.Roster;
+import ch.unisg.assignment.assignment.domain.Task;
+import ch.unisg.assignment.assignment.domain.event.TaskAssignedEvent;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Component
+@Transactional
+public class ApplyForTaskService implements ApplyForTaskUseCase {
+
+    private final TaskAssignedEventPort taskAssignedEventPort;
+
+    @Override
+    public Task applyForTask(ApplyForTaskCommand command) {
+        Task task = Roster.getInstance().assignTaskToExecutor(command.getTaskType(),
+            command.getExecutorIP(), command.getExecutorPort());
+
+        if (task != null) {
+            taskAssignedEventPort.publishTaskAssignedEvent(new TaskAssignedEvent(task.getTaskID()));
+        }
+
+        return task;
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/service/NewTaskService.java

@@ -0,0 +1,46 @@
+package ch.unisg.assignment.assignment.application.service;
+
+import java.util.Arrays;
+import java.util.List;
+
+import javax.transaction.Transactional;
+
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.in.NewTaskCommand;
+import ch.unisg.assignment.assignment.application.port.in.NewTaskUseCase;
+import ch.unisg.assignment.assignment.application.port.out.GetAllExecutorInExecutorPoolByTypePort;
+import ch.unisg.assignment.assignment.application.port.out.NewTaskEventPort;
+import ch.unisg.assignment.assignment.domain.Roster;
+import ch.unisg.assignment.assignment.domain.Task;
+import ch.unisg.assignment.assignment.domain.event.NewTaskEvent;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Component
+@Transactional
+public class NewTaskService implements NewTaskUseCase {
+
+    private final NewTaskEventPort newTaskEventPort;
+    private final GetAllExecutorInExecutorPoolByTypePort getAllExecutorInExecutorPoolByTypePort;
+
+    @Override
+    public boolean addNewTaskToQueue(NewTaskCommand command) {
+
+        // TODO Get availableTaskTypes from  executor pool
+        if (!getAllExecutorInExecutorPoolByTypePort.doesExecutorTypeExist(command.getTaskType())) {
+            return false;
+        }
+
+        Task task = new Task(command.getTaskID(), command.getTaskType());
+
+        Roster.getInstance().addTaskToQueue(task);
+
+        // TODO this event should be in the roster function xyz
+        NewTaskEvent newTaskEvent = new NewTaskEvent(task.getTaskType());
+        newTaskEventPort.publishNewTaskEvent(newTaskEvent);
+
+        return true;
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/application/service/TaskCompletedService.java

@@ -0,0 +1,31 @@
+package ch.unisg.assignment.assignment.application.service;
+
+import javax.transaction.Transactional;
+
+import org.springframework.stereotype.Component;
+
+import ch.unisg.assignment.assignment.application.port.in.TaskCompletedCommand;
+import ch.unisg.assignment.assignment.application.port.in.TaskCompletedUseCase;
+import ch.unisg.assignment.assignment.application.port.out.TaskCompletedEventPort;
+import ch.unisg.assignment.assignment.domain.Roster;
+import ch.unisg.assignment.assignment.domain.event.TaskCompletedEvent;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Component
+@Transactional
+public class TaskCompletedService implements TaskCompletedUseCase {
+
+    private final TaskCompletedEventPort taskCompletedEventPort;
+
+    @Override
+    public void taskCompleted(TaskCompletedCommand command) {
+
+        Roster.getInstance().taskCompleted(command.getTaskID());
+
+        taskCompletedEventPort.publishTaskCompleted(new TaskCompletedEvent(command.getTaskID(),
+            command.getTaskStatus(), command.getTaskResult()));
+
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/ExecutorInfo.java

@@ -0,0 +1,21 @@
+package ch.unisg.assignment.assignment.domain;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+import ch.unisg.assignment.assignment.domain.valueobject.IP4Adress;
+import ch.unisg.assignment.assignment.domain.valueobject.Port;
+import lombok.Getter;
+import lombok.Setter;
+
+public class ExecutorInfo {
+    @Getter
+    @Setter
+    private IP4Adress ip;
+
+    @Getter
+    @Setter
+    private Port port;
+
+    @Getter
+    @Setter
+    private ExecutorType executorType;
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/Roster.java

@@ -0,0 +1,53 @@
+package ch.unisg.assignment.assignment.domain;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+import ch.unisg.assignment.assignment.domain.valueobject.IP4Adress;
+import ch.unisg.assignment.assignment.domain.valueobject.Port;
+
+public class Roster {
+
+    private static final Roster roster = new Roster();
+
+    private HashMap<String, ArrayList<Task>> queues = new HashMap<>();
+
+    private HashMap<String, RosterItem> rosterMap = new HashMap<>();
+
+    public static Roster getInstance() {
+        return roster;
+    }
+
+    private Roster() {}
+
+    public void addTaskToQueue(Task task) {
+        if (queues.containsKey(task.getTaskType().getValue())) {
+            queues.get(task.getTaskType().getValue()).add(task);
+        } else {
+            queues.put(task.getTaskType().getValue(), new ArrayList<>(Arrays.asList(task)));
+        }
+    }
+
+    public Task assignTaskToExecutor(ExecutorType taskType, IP4Adress executorIP, Port executorPort) {
+        if (!queues.containsKey(taskType.getValue())) {
+            return null;
+        }
+        if (queues.get(taskType.getValue()).isEmpty()) {
+            return null;
+        }
+
+        Task task = queues.get(taskType.getValue()).remove(0);
+
+        rosterMap.put(task.getTaskID(), new RosterItem(task.getTaskID(),
+            task.getTaskType().getValue(), executorIP, executorPort));
+
+        return task;
+    }
+
+    public void taskCompleted(String taskID) {
+        rosterMap.remove(taskID);
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/RosterItem.java

@@ -0,0 +1,29 @@
+package ch.unisg.assignment.assignment.domain;
+
+import ch.unisg.assignment.assignment.domain.valueobject.IP4Adress;
+import ch.unisg.assignment.assignment.domain.valueobject.Port;
+import lombok.Getter;
+
+public class RosterItem {
+
+    @Getter
+    private String taskID;
+
+    @Getter
+    private String taskType;
+
+    @Getter
+    private IP4Adress executorIP;
+
+    @Getter
+    private Port executorPort;
+
+
+    public RosterItem(String taskID, String taskType, IP4Adress executorIP, Port executorPort) {
+        this.taskID = taskID;
+        this.taskType = taskType;
+        this.executorIP = executorIP;
+        this.executorPort = executorPort;
+    }
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/Task.java

@@ -0,0 +1,35 @@
+package ch.unisg.assignment.assignment.domain;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+import lombok.Getter;
+import lombok.Setter;
+
+public class Task {
+
+    @Getter
+    private String taskID;
+
+    @Getter
+    private ExecutorType taskType;
+
+    @Getter
+    @Setter
+    private String result;
+
+    @Getter
+    @Setter
+    private String status;
+
+    public Task(String taskID, String taskType) {
+        this.taskID = taskID;
+        this.taskType = new ExecutorType(taskType);
+    }
+
+    public Task(String taskID, ExecutorType taskType) {
+        this.taskID = taskID;
+        this.taskType = taskType;
+    }
+
+    public Task() {}
+
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/event/NewTaskEvent.java

@@ -0,0 +1,11 @@
+package ch.unisg.assignment.assignment.domain.event;
+
+import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
+
+public class NewTaskEvent {
+    public final ExecutorType taskType;
+
+    public NewTaskEvent(ExecutorType taskType) {
+        this.taskType = taskType;
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/event/TaskAssignedEvent.java

@@ -0,0 +1,9 @@
+package ch.unisg.assignment.assignment.domain.event;
+
+public class TaskAssignedEvent {
+    public final String taskID;
+
+    public TaskAssignedEvent(String taskID) {
+        this.taskID = taskID;
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/event/TaskCompletedEvent.java

@@ -0,0 +1,15 @@
+package ch.unisg.assignment.assignment.domain.event;
+
+public class TaskCompletedEvent {
+    public final String taskID;
+
+    public final String status;
+
+    public final String result;
+
+    public TaskCompletedEvent(String taskID, String status, String result) {
+        this.taskID = taskID;
+        this.status = status;
+        this.result = result;
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/ExecutorType.java

@@ -0,0 +1,12 @@
+package ch.unisg.assignment.assignment.domain.valueobject;
+
+import lombok.Value;
+
+@Value
+public class ExecutorType {
+    private String value;
+
+    public ExecutorType(String type) {
+        this.value = type.toUpperCase();
+    }
+}

assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/IP4Adress.java

@@ -0,0 +1,23 @@
+package ch.unisg.assignment.assignment.domain.valueobject;
+
+import ch.unisg.assignment.common.exception.InvalidIP4Exception;
+import lombok.Value;
+
+@Value
+public class IP4Adress {
+    private String value;
+
+    public IP4Adress(String ip4) throws InvalidIP4Exception {
+        if (ip4.equalsIgnoreCase("localhost") ||
+                ip4.matches("^((25[0-5]|(2[0-4]|1\\d|[1-9]|)\\d)(\\.(?!$)|$)){4}$")) {
+            this.value = ip4;
+        } else {
+            throw new InvalidIP4Exception();
+        }
+    }
+}
+
+
+
+
+

assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/Port.java

@@ -0,0 +1,17 @@
+package ch.unisg.assignment.assignment.domain.valueobject;
+
+import ch.unisg.assignment.common.exception.PortOutOfRangeException;
+import lombok.Value;
+
+@Value
+public class Port {
+    private int value;
+
+    public Port(int port) throws PortOutOfRangeException {
+        if (1024 <= port && port <= 65535) {
+            this.value = port;
+        } else {
+            throw new PortOutOfRangeException();
+        }
+    }
+}

assignment/src/main/java/ch/unisg/assignment/common/SelfValidating.java

@@ -0,0 +1,31 @@
+package ch.unisg.assignment.common;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.ConstraintViolationException;
+import javax.validation.Validation;
+import javax.validation.Validator;
+import javax.validation.ValidatorFactory;
+import java.util.Set;
+
+public abstract class SelfValidating<T> {
+
+    private Validator validator;
+
+    protected SelfValidating() {
+        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
+        validator = factory.getValidator();
+    }
+
+    /**
+     * Evaluates all Bean Validations on the attributes of this
+     * instance.
+     */
+    protected void validateSelf() {
+        @SuppressWarnings("unchecked")
+        Set<ConstraintViolation<T>> violations = validator.validate((T) this);
+        if (!violations.isEmpty()) {
+            throw new ConstraintViolationException(violations);
+        }
+    }
+}
+

assignment/src/main/java/ch/unisg/assignment/common/exception/ErrorResponse.java

@@ -0,0 +1,13 @@
+package ch.unisg.assignment.common.exception;
+
+import org.springframework.http.HttpStatus;
+
+import lombok.Data;
+import lombok.RequiredArgsConstructor;
+
+@Data
+@RequiredArgsConstructor
+public class ErrorResponse {
+    private final HttpStatus httpStatus;
+    private final String message;
+}

assignment/src/main/java/ch/unisg/assignment/common/exception/InvalidIP4Exception.java

@@ -0,0 +1,7 @@
+package ch.unisg.assignment.common.exception;
+
+public class InvalidIP4Exception extends Exception {
+    public InvalidIP4Exception() {
+        super("IP4 is invalid");
+    }
+}

assignment/src/main/java/ch/unisg/assignment/common/exception/PortOutOfRangeException.java

@@ -0,0 +1,7 @@
+package ch.unisg.assignment.common.exception;
+
+public class PortOutOfRangeException extends Exception {
+    public PortOutOfRangeException() {
+        super("Port is out of available range (1024-65535)");
+    }
+}

assignment/src/main/resources/application.properties

@@ -0,0 +1 @@
+server.port=8082

assignment/src/test/java/ch/unisg/assignment/AssignmentApplicationTests.java

@@ -0,0 +1,13 @@
+package ch.unisg.assignment;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class AssignmentApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

diagram_1.bpmn

@@ -0,0 +1,653 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:modeler="http://camunda.org/schema/modeler/1.0" id="Definitions_0qxgodh" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="4.8.1" modeler:executionPlatform="Camunda Platform" modeler:executionPlatformVersion="7.15.0">
+  <bpmn:collaboration id="Collaboration_0anvhsf">
+    <bpmn:participant id="Participant_0q8hukc" name="Create Task" processRef="Process_0g1u0dm" />
+    <bpmn:participant id="Participant_143daut" name="Executor Ideling" processRef="Process_0s8woey" />
+    <bpmn:participant id="Participant_1q0bjfl" name="Request more executors" processRef="Process_0p5wk5x" />
+    <bpmn:participant id="Participant_062djli" name="Executor Requests for work" processRef="Process_1iep78l" />
+    <bpmn:participant id="Participant_1ova0gb" name="Executor finish task" processRef="Process_102ufh8" />
+    <bpmn:messageFlow id="Flow_1xo6v1g" sourceRef="Activity_0u3tts0" targetRef="Activity_1q87dyp" />
+  </bpmn:collaboration>
+  <bpmn:process id="Process_0g1u0dm" isExecutable="false">
+    <bpmn:laneSet id="LaneSet_1lcmyw6">
+      <bpmn:lane id="Lane_1qeq039" name="Assignment Service">
+        <bpmn:flowNodeRef>Gateway_1vd3as7</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_1jd11bs</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Gateway_1e4ckdq</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_1dl4fvt</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Gateway_1e3rabp</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_1lm6x5y</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_1ysgenb</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_00rvb9o</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0u3tts0</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0vs4eam</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0mwpp9o</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_0v7hm2z</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0paecdb</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0srcl99</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0assw9c</bpmn:flowNodeRef>
+      </bpmn:lane>
+      <bpmn:lane id="Lane_12khd4k" name="Task Service">
+        <bpmn:flowNodeRef>Activity_0jai885</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>StartEvent_1</bpmn:flowNodeRef>
+      </bpmn:lane>
+    </bpmn:laneSet>
+    <bpmn:exclusiveGateway id="Gateway_1vd3as7">
+      <bpmn:incoming>Flow_1hc51tx</bpmn:incoming>
+      <bpmn:outgoing>Flow_1sajzlx</bpmn:outgoing>
+      <bpmn:outgoing>Flow_1ijfkpz</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_1jd11bs" name="Check if more tasks of the same are in a queue">
+      <bpmn:incoming>Flow_1sajzlx</bpmn:incoming>
+      <bpmn:outgoing>Flow_0cpd5ad</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:exclusiveGateway id="Gateway_1e4ckdq">
+      <bpmn:incoming>Flow_0cpd5ad</bpmn:incoming>
+      <bpmn:outgoing>Flow_0kwvrmc</bpmn:outgoing>
+      <bpmn:outgoing>Flow_1w3uh2m</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_1dl4fvt" name="Add task to queue">
+      <bpmn:incoming>Flow_0kwvrmc</bpmn:incoming>
+      <bpmn:outgoing>Flow_0vpcut0</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:exclusiveGateway id="Gateway_1e3rabp">
+      <bpmn:incoming>Flow_0vpcut0</bpmn:incoming>
+      <bpmn:outgoing>Flow_179e0hl</bpmn:outgoing>
+      <bpmn:outgoing>Flow_12nh0g5</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:endEvent id="Event_1lm6x5y">
+      <bpmn:incoming>Flow_179e0hl</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:endEvent id="Event_1ysgenb">
+      <bpmn:incoming>Flow_0366zqm</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:endEvent id="Event_00rvb9o">
+      <bpmn:incoming>Flow_1n8jm89</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:sendTask id="Activity_0u3tts0" name="Let executors know that there is work">
+      <bpmn:incoming>Flow_1w3uh2m</bpmn:incoming>
+      <bpmn:outgoing>Flow_1n8jm89</bpmn:outgoing>
+    </bpmn:sendTask>
+    <bpmn:task id="Activity_0jai885" name="Create Task">
+      <bpmn:incoming>Flow_19dbo28</bpmn:incoming>
+      <bpmn:outgoing>Flow_1rwgf2n</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:startEvent id="StartEvent_1">
+      <bpmn:outgoing>Flow_19dbo28</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:task id="Activity_0vs4eam" name="Request auctionshouse completion">
+      <bpmn:incoming>Flow_1ijfkpz</bpmn:incoming>
+      <bpmn:outgoing>Flow_1gvdy5x</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:task id="Activity_0mwpp9o" name="Some currently unknown Auctionhouse logic">
+      <bpmn:incoming>Flow_1gvdy5x</bpmn:incoming>
+      <bpmn:outgoing>Flow_1yxp4e8</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:endEvent id="Event_0v7hm2z">
+      <bpmn:incoming>Flow_1yxp4e8</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:task id="Activity_0paecdb" name="Checks if task can be handled internaly">
+      <bpmn:incoming>Flow_1rwgf2n</bpmn:incoming>
+      <bpmn:outgoing>Flow_1hc51tx</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:task id="Activity_0srcl99" name="(This can be checked here bc we are caching infos from the executor pool)" />
+    <bpmn:subProcess id="Activity_0assw9c" name="Request more executors">
+      <bpmn:incoming>Flow_12nh0g5</bpmn:incoming>
+      <bpmn:outgoing>Flow_0366zqm</bpmn:outgoing>
+    </bpmn:subProcess>
+    <bpmn:sequenceFlow id="Flow_1hc51tx" sourceRef="Activity_0paecdb" targetRef="Gateway_1vd3as7" />
+    <bpmn:sequenceFlow id="Flow_1sajzlx" name="Yes" sourceRef="Gateway_1vd3as7" targetRef="Activity_1jd11bs" />
+    <bpmn:sequenceFlow id="Flow_0cpd5ad" sourceRef="Activity_1jd11bs" targetRef="Gateway_1e4ckdq" />
+    <bpmn:sequenceFlow id="Flow_0kwvrmc" name="Yes" sourceRef="Gateway_1e4ckdq" targetRef="Activity_1dl4fvt" />
+    <bpmn:sequenceFlow id="Flow_0vpcut0" name="Are more than X tasks in queue?" sourceRef="Activity_1dl4fvt" targetRef="Gateway_1e3rabp" />
+    <bpmn:sequenceFlow id="Flow_179e0hl" name="No" sourceRef="Gateway_1e3rabp" targetRef="Event_1lm6x5y" />
+    <bpmn:sequenceFlow id="Flow_12nh0g5" name="Yes" sourceRef="Gateway_1e3rabp" targetRef="Activity_0assw9c" />
+    <bpmn:sequenceFlow id="Flow_0366zqm" sourceRef="Activity_0assw9c" targetRef="Event_1ysgenb" />
+    <bpmn:sequenceFlow id="Flow_1w3uh2m" name="No" sourceRef="Gateway_1e4ckdq" targetRef="Activity_0u3tts0" />
+    <bpmn:sequenceFlow id="Flow_1n8jm89" sourceRef="Activity_0u3tts0" targetRef="Event_00rvb9o" />
+    <bpmn:sequenceFlow id="Flow_1rwgf2n" sourceRef="Activity_0jai885" targetRef="Activity_0paecdb" />
+    <bpmn:sequenceFlow id="Flow_19dbo28" sourceRef="StartEvent_1" targetRef="Activity_0jai885" />
+    <bpmn:sequenceFlow id="Flow_1gvdy5x" sourceRef="Activity_0vs4eam" targetRef="Activity_0mwpp9o" />
+    <bpmn:sequenceFlow id="Flow_1ijfkpz" name="No" sourceRef="Gateway_1vd3as7" targetRef="Activity_0vs4eam" />
+    <bpmn:sequenceFlow id="Flow_1yxp4e8" sourceRef="Activity_0mwpp9o" targetRef="Event_0v7hm2z" />
+  </bpmn:process>
+  <bpmn:process id="Process_0s8woey" isExecutable="false">
+    <bpmn:receiveTask id="Activity_1q87dyp" name="Gets information about work">
+      <bpmn:outgoing>Flow_119ldsr</bpmn:outgoing>
+    </bpmn:receiveTask>
+    <bpmn:endEvent id="Event_170rm9y">
+      <bpmn:incoming>Flow_1mm9swr</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:subProcess id="Activity_0h1d3g9" name="Executor Requests for work">
+      <bpmn:incoming>Flow_119ldsr</bpmn:incoming>
+      <bpmn:outgoing>Flow_1mm9swr</bpmn:outgoing>
+    </bpmn:subProcess>
+    <bpmn:sequenceFlow id="Flow_119ldsr" sourceRef="Activity_1q87dyp" targetRef="Activity_0h1d3g9" />
+    <bpmn:sequenceFlow id="Flow_1mm9swr" sourceRef="Activity_0h1d3g9" targetRef="Event_170rm9y" />
+  </bpmn:process>
+  <bpmn:process id="Process_0p5wk5x" isExecutable="false">
+    <bpmn:laneSet id="LaneSet_1r5f5iw">
+      <bpmn:lane id="Lane_06e7su5" name="Assignment Service">
+        <bpmn:flowNodeRef>Event_0v73rhy</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0n8uuvk</bpmn:flowNodeRef>
+      </bpmn:lane>
+      <bpmn:lane id="Lane_1lg2d2q" name="Execturo Pool">
+        <bpmn:flowNodeRef>Activity_06xjrrk</bpmn:flowNodeRef>
+      </bpmn:lane>
+      <bpmn:lane id="Lane_19i1lbs" name="Executor">
+        <bpmn:flowNodeRef>Activity_0uxkytf</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_01nh9j2</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_1qgjnyh</bpmn:flowNodeRef>
+      </bpmn:lane>
+    </bpmn:laneSet>
+    <bpmn:startEvent id="Event_0v73rhy">
+      <bpmn:outgoing>Flow_17d0j42</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:task id="Activity_0n8uuvk" name="Request more executors">
+      <bpmn:incoming>Flow_17d0j42</bpmn:incoming>
+      <bpmn:outgoing>Flow_0opy5tp</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:task id="Activity_06xjrrk" name="Add/start new executors">
+      <bpmn:incoming>Flow_0opy5tp</bpmn:incoming>
+      <bpmn:outgoing>Flow_0sudw7l</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:task id="Activity_0uxkytf" name="Exectuor starts">
+      <bpmn:incoming>Flow_0sudw7l</bpmn:incoming>
+      <bpmn:outgoing>Flow_02uzxx3</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:endEvent id="Event_01nh9j2">
+      <bpmn:incoming>Flow_0rpv16j</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:subProcess id="Activity_1qgjnyh" name="Executor Requests for work">
+      <bpmn:incoming>Flow_02uzxx3</bpmn:incoming>
+      <bpmn:outgoing>Flow_0rpv16j</bpmn:outgoing>
+    </bpmn:subProcess>
+    <bpmn:sequenceFlow id="Flow_17d0j42" sourceRef="Event_0v73rhy" targetRef="Activity_0n8uuvk" />
+    <bpmn:sequenceFlow id="Flow_0opy5tp" sourceRef="Activity_0n8uuvk" targetRef="Activity_06xjrrk" />
+    <bpmn:sequenceFlow id="Flow_02uzxx3" sourceRef="Activity_0uxkytf" targetRef="Activity_1qgjnyh" />
+    <bpmn:sequenceFlow id="Flow_0sudw7l" sourceRef="Activity_06xjrrk" targetRef="Activity_0uxkytf" />
+    <bpmn:sequenceFlow id="Flow_0rpv16j" sourceRef="Activity_1qgjnyh" targetRef="Event_01nh9j2" />
+  </bpmn:process>
+  <bpmn:process id="Process_1iep78l" isExecutable="false">
+    <bpmn:laneSet id="LaneSet_03zwzb7">
+      <bpmn:lane id="Lane_06xhlk6" name="Executor">
+        <bpmn:flowNodeRef>Event_1oz3tr5</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0xk9kck</bpmn:flowNodeRef>
+      </bpmn:lane>
+      <bpmn:lane id="Lane_02fg9xj" name="Assignment service">
+        <bpmn:flowNodeRef>Gateway_079742h</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0umieiz</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_062x6a9</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_0b6bh6v</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_1achffx</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_1mme68o</bpmn:flowNodeRef>
+      </bpmn:lane>
+    </bpmn:laneSet>
+    <bpmn:startEvent id="Event_1oz3tr5">
+      <bpmn:outgoing>Flow_0od6iot</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:task id="Activity_0xk9kck" name="Ask for work">
+      <bpmn:incoming>Flow_0od6iot</bpmn:incoming>
+      <bpmn:outgoing>Flow_0k07ofo</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:exclusiveGateway id="Gateway_079742h">
+      <bpmn:incoming>Flow_0k07ofo</bpmn:incoming>
+      <bpmn:outgoing>Flow_1fwmda3</bpmn:outgoing>
+      <bpmn:outgoing>Flow_050yku1</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_0umieiz" name="Assign task to executor">
+      <bpmn:incoming>Flow_1fwmda3</bpmn:incoming>
+      <bpmn:outgoing>Flow_15lkkxa</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:endEvent id="Event_062x6a9">
+      <bpmn:incoming>Flow_15lkkxa</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:task id="Activity_0b6bh6v" name="Some logic to reduce amount of executors if possible???">
+      <bpmn:incoming>Flow_050yku1</bpmn:incoming>
+      <bpmn:outgoing>Flow_1lgcq8d</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:endEvent id="Event_1achffx">
+      <bpmn:incoming>Flow_0oqra8s</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:task id="Activity_1mme68o" name="Executor idle&#39;s">
+      <bpmn:incoming>Flow_1lgcq8d</bpmn:incoming>
+      <bpmn:outgoing>Flow_0oqra8s</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:sequenceFlow id="Flow_0od6iot" sourceRef="Event_1oz3tr5" targetRef="Activity_0xk9kck" />
+    <bpmn:sequenceFlow id="Flow_0k07ofo" name="Check if tasks are in queue" sourceRef="Activity_0xk9kck" targetRef="Gateway_079742h" />
+    <bpmn:sequenceFlow id="Flow_1fwmda3" name="Yes" sourceRef="Gateway_079742h" targetRef="Activity_0umieiz" />
+    <bpmn:sequenceFlow id="Flow_15lkkxa" sourceRef="Activity_0umieiz" targetRef="Event_062x6a9" />
+    <bpmn:sequenceFlow id="Flow_050yku1" name="No" sourceRef="Gateway_079742h" targetRef="Activity_0b6bh6v" />
+    <bpmn:sequenceFlow id="Flow_1lgcq8d" sourceRef="Activity_0b6bh6v" targetRef="Activity_1mme68o" />
+    <bpmn:sequenceFlow id="Flow_0oqra8s" sourceRef="Activity_1mme68o" targetRef="Event_1achffx" />
+  </bpmn:process>
+  <bpmn:process id="Process_102ufh8" isExecutable="false">
+    <bpmn:laneSet id="LaneSet_15t2y8k">
+      <bpmn:lane id="Lane_0lvtv1p" name="Executor">
+        <bpmn:flowNodeRef>Event_1b2jt5y</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_1ikvmpl</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_0y66dbe</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_11lqrhg</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Activity_1oownmu</bpmn:flowNodeRef>
+      </bpmn:lane>
+      <bpmn:lane id="Lane_1jghhc4" name="Assignment service">
+        <bpmn:flowNodeRef>Activity_1ohwol1</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_0bbqq3x</bpmn:flowNodeRef>
+      </bpmn:lane>
+      <bpmn:lane id="Lane_0k7q1xv" name="task service">
+        <bpmn:flowNodeRef>Activity_1e9hb9h</bpmn:flowNodeRef>
+        <bpmn:flowNodeRef>Event_0l7ljcr</bpmn:flowNodeRef>
+      </bpmn:lane>
+    </bpmn:laneSet>
+    <bpmn:startEvent id="Event_1b2jt5y">
+      <bpmn:outgoing>Flow_046hsk4</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:task id="Activity_1ikvmpl" name="Executor finish work">
+      <bpmn:incoming>Flow_046hsk4</bpmn:incoming>
+      <bpmn:outgoing>Flow_0zoqmub</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:endEvent id="Event_0y66dbe">
+      <bpmn:incoming>Flow_0nyxv8e</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:sendTask id="Activity_11lqrhg" name="Send finish message">
+      <bpmn:incoming>Flow_0zoqmub</bpmn:incoming>
+      <bpmn:outgoing>Flow_0ip5x3i</bpmn:outgoing>
+      <bpmn:outgoing>Flow_1bqiz65</bpmn:outgoing>
+      <bpmn:outgoing>Flow_142xsjm</bpmn:outgoing>
+    </bpmn:sendTask>
+    <bpmn:task id="Activity_1ohwol1" name="Update tasks status to finished">
+      <bpmn:incoming>Flow_1bqiz65</bpmn:incoming>
+      <bpmn:outgoing>Flow_0znvsoe</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:task id="Activity_1e9hb9h" name="Update task status to finished">
+      <bpmn:incoming>Flow_142xsjm</bpmn:incoming>
+      <bpmn:outgoing>Flow_0ue2i8v</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:endEvent id="Event_0l7ljcr">
+      <bpmn:incoming>Flow_0ue2i8v</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:endEvent id="Event_0bbqq3x">
+      <bpmn:incoming>Flow_0znvsoe</bpmn:incoming>
+    </bpmn:endEvent>
+    <bpmn:subProcess id="Activity_1oownmu" name="Executor Requests for work">
+      <bpmn:incoming>Flow_0ip5x3i</bpmn:incoming>
+      <bpmn:outgoing>Flow_0nyxv8e</bpmn:outgoing>
+    </bpmn:subProcess>
+    <bpmn:sequenceFlow id="Flow_046hsk4" sourceRef="Event_1b2jt5y" targetRef="Activity_1ikvmpl" />
+    <bpmn:sequenceFlow id="Flow_0zoqmub" sourceRef="Activity_1ikvmpl" targetRef="Activity_11lqrhg" />
+    <bpmn:sequenceFlow id="Flow_0ip5x3i" sourceRef="Activity_11lqrhg" targetRef="Activity_1oownmu" />
+    <bpmn:sequenceFlow id="Flow_0nyxv8e" sourceRef="Activity_1oownmu" targetRef="Event_0y66dbe" />
+    <bpmn:sequenceFlow id="Flow_1bqiz65" sourceRef="Activity_11lqrhg" targetRef="Activity_1ohwol1" />
+    <bpmn:sequenceFlow id="Flow_142xsjm" sourceRef="Activity_11lqrhg" targetRef="Activity_1e9hb9h" />
+    <bpmn:sequenceFlow id="Flow_0ue2i8v" sourceRef="Activity_1e9hb9h" targetRef="Event_0l7ljcr" />
+    <bpmn:sequenceFlow id="Flow_0znvsoe" sourceRef="Activity_1ohwol1" targetRef="Event_0bbqq3x" />
+  </bpmn:process>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Collaboration_0anvhsf">
+      <bpmndi:BPMNShape id="Participant_0q8hukc_di" bpmnElement="Participant_0q8hukc" isHorizontal="true">
+        <dc:Bounds x="140" y="80" width="1728" height="590" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_1qeq039_di" bpmnElement="Lane_1qeq039" isHorizontal="true">
+        <dc:Bounds x="170" y="200" width="1698" height="470" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_12khd4k_di" bpmnElement="Lane_12khd4k" isHorizontal="true">
+        <dc:Bounds x="170" y="80" width="1698" height="120" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_1hc51tx_di" bpmnElement="Flow_1hc51tx">
+        <di:waypoint x="408" y="310" />
+        <di:waypoint x="495" y="310" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="405" y="576" width="83" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1sajzlx_di" bpmnElement="Flow_1sajzlx">
+        <di:waypoint x="545" y="310" />
+        <di:waypoint x="680" y="310" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="604" y="292" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0cpd5ad_di" bpmnElement="Flow_0cpd5ad">
+        <di:waypoint x="780" y="310" />
+        <di:waypoint x="915" y="310" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="839" y="592" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0kwvrmc_di" bpmnElement="Flow_0kwvrmc">
+        <di:waypoint x="965" y="310" />
+        <di:waypoint x="1070" y="310" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1009" y="292" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0vpcut0_di" bpmnElement="Flow_0vpcut0">
+        <di:waypoint x="1170" y="310" />
+        <di:waypoint x="1345" y="310" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1217" y="276" width="81" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_179e0hl_di" bpmnElement="Flow_179e0hl">
+        <di:waypoint x="1395" y="310" />
+        <di:waypoint x="1542" y="310" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1462" y="292" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_12nh0g5_di" bpmnElement="Flow_12nh0g5">
+        <di:waypoint x="1370" y="335" />
+        <di:waypoint x="1370" y="420" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1376" y="375" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0366zqm_di" bpmnElement="Flow_0366zqm">
+        <di:waypoint x="1420" y="460" />
+        <di:waypoint x="1542" y="460" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1w3uh2m_di" bpmnElement="Flow_1w3uh2m">
+        <di:waypoint x="940" y="335" />
+        <di:waypoint x="940" y="420" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="948" y="368" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1n8jm89_di" bpmnElement="Flow_1n8jm89">
+        <di:waypoint x="990" y="460" />
+        <di:waypoint x="1102" y="460" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1rwgf2n_di" bpmnElement="Flow_1rwgf2n">
+        <di:waypoint x="358" y="180" />
+        <di:waypoint x="358" y="270" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_19dbo28_di" bpmnElement="Flow_19dbo28">
+        <di:waypoint x="258" y="140" />
+        <di:waypoint x="308" y="140" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1gvdy5x_di" bpmnElement="Flow_1gvdy5x">
+        <di:waypoint x="520" y="510" />
+        <di:waypoint x="520" y="560" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1ijfkpz_di" bpmnElement="Flow_1ijfkpz">
+        <di:waypoint x="520" y="335" />
+        <di:waypoint x="520" y="430" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="532" y="368" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1yxp4e8_di" bpmnElement="Flow_1yxp4e8">
+        <di:waypoint x="570" y="600" />
+        <di:waypoint x="662" y="600" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Gateway_1vd3as7_di" bpmnElement="Gateway_1vd3as7" isMarkerVisible="true">
+        <dc:Bounds x="495" y="285" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1jd11bs_di" bpmnElement="Activity_1jd11bs">
+        <dc:Bounds x="680" y="270" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_1e4ckdq_di" bpmnElement="Gateway_1e4ckdq" isMarkerVisible="true">
+        <dc:Bounds x="915" y="285" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1dl4fvt_di" bpmnElement="Activity_1dl4fvt">
+        <dc:Bounds x="1070" y="270" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_1e3rabp_di" bpmnElement="Gateway_1e3rabp" isMarkerVisible="true">
+        <dc:Bounds x="1345" y="285" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_1lm6x5y_di" bpmnElement="Event_1lm6x5y">
+        <dc:Bounds x="1542" y="292" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_1ysgenb_di" bpmnElement="Event_1ysgenb">
+        <dc:Bounds x="1542" y="442" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_00rvb9o_di" bpmnElement="Event_00rvb9o">
+        <dc:Bounds x="1102" y="442" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_190bh4a_di" bpmnElement="Activity_0u3tts0">
+        <dc:Bounds x="890" y="420" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0jai885_di" bpmnElement="Activity_0jai885">
+        <dc:Bounds x="308" y="100" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
+        <dc:Bounds x="222" y="122" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0vs4eam_di" bpmnElement="Activity_0vs4eam">
+        <dc:Bounds x="470" y="430" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0mwpp9o_di" bpmnElement="Activity_0mwpp9o">
+        <dc:Bounds x="470" y="560" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_0v7hm2z_di" bpmnElement="Event_0v7hm2z">
+        <dc:Bounds x="662" y="582" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0paecdb_di" bpmnElement="Activity_0paecdb">
+        <dc:Bounds x="308" y="270" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0srcl99_di" bpmnElement="Activity_0srcl99">
+        <dc:Bounds x="308" y="350" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1iyu1x2_di" bpmnElement="Activity_0assw9c">
+        <dc:Bounds x="1320" y="420" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_143daut_di" bpmnElement="Participant_143daut" isHorizontal="true">
+        <dc:Bounds x="820" y="710" width="1048" height="250" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_119ldsr_di" bpmnElement="Flow_119ldsr">
+        <di:waypoint x="990" y="820" />
+        <di:waypoint x="1110" y="820" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1mm9swr_di" bpmnElement="Flow_1mm9swr">
+        <di:waypoint x="1210" y="820" />
+        <di:waypoint x="1312" y="820" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Activity_0fc3d7o_di" bpmnElement="Activity_1q87dyp">
+        <dc:Bounds x="890" y="780" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_170rm9y_di" bpmnElement="Event_170rm9y">
+        <dc:Bounds x="1312" y="802" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0t1gk0s_di" bpmnElement="Activity_0h1d3g9">
+        <dc:Bounds x="1110" y="780" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_062djli_di" bpmnElement="Participant_062djli" isHorizontal="true">
+        <dc:Bounds x="820" y="1000" width="1048" height="470" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_06xhlk6_di" bpmnElement="Lane_06xhlk6" isHorizontal="true">
+        <dc:Bounds x="850" y="1000" width="1018" height="125" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_02fg9xj_di" bpmnElement="Lane_02fg9xj" isHorizontal="true">
+        <dc:Bounds x="850" y="1125" width="1018" height="345" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_0od6iot_di" bpmnElement="Flow_0od6iot">
+        <di:waypoint x="948" y="1060" />
+        <di:waypoint x="1060" y="1060" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0k07ofo_di" bpmnElement="Flow_0k07ofo">
+        <di:waypoint x="1110" y="1100" />
+        <di:waypoint x="1110" y="1215" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1116" y="1155" width="88" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1fwmda3_di" bpmnElement="Flow_1fwmda3">
+        <di:waypoint x="1135" y="1240" />
+        <di:waypoint x="1250" y="1240" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1184" y="1222" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_15lkkxa_di" bpmnElement="Flow_15lkkxa">
+        <di:waypoint x="1350" y="1240" />
+        <di:waypoint x="1472" y="1240" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_050yku1_di" bpmnElement="Flow_050yku1">
+        <di:waypoint x="1110" y="1265" />
+        <di:waypoint x="1110" y="1380" />
+        <di:waypoint x="1250" y="1380" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1118" y="1320" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1lgcq8d_di" bpmnElement="Flow_1lgcq8d">
+        <di:waypoint x="1350" y="1380" />
+        <di:waypoint x="1430" y="1380" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0oqra8s_di" bpmnElement="Flow_0oqra8s">
+        <di:waypoint x="1530" y="1380" />
+        <di:waypoint x="1602" y="1380" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Event_1oz3tr5_di" bpmnElement="Event_1oz3tr5">
+        <dc:Bounds x="912" y="1042" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0xk9kck_di" bpmnElement="Activity_0xk9kck">
+        <dc:Bounds x="1060" y="1020" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_079742h_di" bpmnElement="Gateway_079742h" isMarkerVisible="true">
+        <dc:Bounds x="1085" y="1215" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0umieiz_di" bpmnElement="Activity_0umieiz">
+        <dc:Bounds x="1250" y="1200" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_062x6a9_di" bpmnElement="Event_062x6a9">
+        <dc:Bounds x="1472" y="1222" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0b6bh6v_di" bpmnElement="Activity_0b6bh6v">
+        <dc:Bounds x="1250" y="1340" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_1achffx_di" bpmnElement="Event_1achffx">
+        <dc:Bounds x="1602" y="1362" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1mme68o_di" bpmnElement="Activity_1mme68o">
+        <dc:Bounds x="1430" y="1340" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_0xytik6_di" bpmnElement="Participant_1q0bjfl" isHorizontal="true">
+        <dc:Bounds x="140" y="710" width="600" height="370" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_06e7su5_di" bpmnElement="Lane_06e7su5" isHorizontal="true">
+        <dc:Bounds x="170" y="710" width="570" height="125" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_1lg2d2q_di" bpmnElement="Lane_1lg2d2q" isHorizontal="true">
+        <dc:Bounds x="170" y="835" width="570" height="125" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_19i1lbs_di" bpmnElement="Lane_19i1lbs" isHorizontal="true">
+        <dc:Bounds x="170" y="960" width="570" height="120" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_17d0j42_di" bpmnElement="Flow_17d0j42">
+        <di:waypoint x="268" y="770" />
+        <di:waypoint x="370" y="770" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0opy5tp_di" bpmnElement="Flow_0opy5tp">
+        <di:waypoint x="420" y="810" />
+        <di:waypoint x="420" y="860" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_02uzxx3_di" bpmnElement="Flow_02uzxx3">
+        <di:waypoint x="470" y="1020" />
+        <di:waypoint x="520" y="1020" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0sudw7l_di" bpmnElement="Flow_0sudw7l">
+        <di:waypoint x="420" y="940" />
+        <di:waypoint x="420" y="980" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0rpv16j_di" bpmnElement="Flow_0rpv16j">
+        <di:waypoint x="620" y="1020" />
+        <di:waypoint x="682" y="1020" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Event_0v73rhy_di" bpmnElement="Event_0v73rhy">
+        <dc:Bounds x="232" y="752" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0n8uuvk_di" bpmnElement="Activity_0n8uuvk">
+        <dc:Bounds x="370" y="730" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_06xjrrk_di" bpmnElement="Activity_06xjrrk">
+        <dc:Bounds x="370" y="860" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_00bhvrm_di" bpmnElement="Activity_0uxkytf">
+        <dc:Bounds x="370" y="980" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_01nh9j2_di" bpmnElement="Event_01nh9j2">
+        <dc:Bounds x="682" y="1002" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1r1i7hf_di" bpmnElement="Activity_1qgjnyh">
+        <dc:Bounds x="520" y="980" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_1ova0gb_di" bpmnElement="Participant_1ova0gb" isHorizontal="true">
+        <dc:Bounds x="140" y="1530" width="820" height="370" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_0lvtv1p_di" bpmnElement="Lane_0lvtv1p" isHorizontal="true">
+        <dc:Bounds x="170" y="1530" width="790" height="125" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_1jghhc4_di" bpmnElement="Lane_1jghhc4" isHorizontal="true">
+        <dc:Bounds x="170" y="1655" width="790" height="125" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Lane_0k7q1xv_di" bpmnElement="Lane_0k7q1xv" isHorizontal="true">
+        <dc:Bounds x="170" y="1780" width="790" height="120" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_046hsk4_di" bpmnElement="Flow_046hsk4">
+        <di:waypoint x="268" y="1600" />
+        <di:waypoint x="320" y="1600" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0zoqmub_di" bpmnElement="Flow_0zoqmub">
+        <di:waypoint x="420" y="1600" />
+        <di:waypoint x="530" y="1600" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0ip5x3i_di" bpmnElement="Flow_0ip5x3i">
+        <di:waypoint x="630" y="1600" />
+        <di:waypoint x="720" y="1600" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0nyxv8e_di" bpmnElement="Flow_0nyxv8e">
+        <di:waypoint x="820" y="1600" />
+        <di:waypoint x="902" y="1600" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1bqiz65_di" bpmnElement="Flow_1bqiz65">
+        <di:waypoint x="580" y="1640" />
+        <di:waypoint x="580" y="1710" />
+        <di:waypoint x="430" y="1710" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_142xsjm_di" bpmnElement="Flow_142xsjm">
+        <di:waypoint x="580" y="1640" />
+        <di:waypoint x="580" y="1800" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0ue2i8v_di" bpmnElement="Flow_0ue2i8v">
+        <di:waypoint x="630" y="1840" />
+        <di:waypoint x="682" y="1840" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0znvsoe_di" bpmnElement="Flow_0znvsoe">
+        <di:waypoint x="330" y="1720" />
+        <di:waypoint x="268" y="1720" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Event_1b2jt5y_di" bpmnElement="Event_1b2jt5y">
+        <dc:Bounds x="232" y="1582" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1ikvmpl_di" bpmnElement="Activity_1ikvmpl">
+        <dc:Bounds x="320" y="1560" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_0y66dbe_di" bpmnElement="Event_0y66dbe">
+        <dc:Bounds x="902" y="1582" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0ujophe_di" bpmnElement="Activity_11lqrhg">
+        <dc:Bounds x="530" y="1560" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1ohwol1_di" bpmnElement="Activity_1ohwol1">
+        <dc:Bounds x="330" y="1680" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1e9hb9h_di" bpmnElement="Activity_1e9hb9h">
+        <dc:Bounds x="530" y="1800" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_0l7ljcr_di" bpmnElement="Event_0l7ljcr">
+        <dc:Bounds x="682" y="1822" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Event_0bbqq3x_di" bpmnElement="Event_0bbqq3x">
+        <dc:Bounds x="232" y="1702" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1oownmu_di" bpmnElement="Activity_1oownmu">
+        <dc:Bounds x="720" y="1560" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_1xo6v1g_di" bpmnElement="Flow_1xo6v1g">
+        <di:waypoint x="940" y="500" />
+        <di:waypoint x="940" y="780" />
+      </bpmndi:BPMNEdge>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn:definitions>

docker-compose.yaml

@@ -0,0 +1,62 @@
+version: "3.6"
+services:
+    tapas-tasks:
+        container_name: tapas-tasks
+        build:
+            context: "./tapas-tasks"
+            dockerfile: "Dockerfile"
+            target: development
+        ports:
+            - "8081:8081"
+            - "5005:5005"
+        volumes:
+            - ./tapas-tasks/src:/opt/app/src
+            - ./tapas-tasks/target:/opt/app/target
+    assignment:
+        container_name: assignment
+        build:
+            context: "./assignment"
+            dockerfile: "Dockerfile"
+            target: development
+        ports:
+            - "8082:8082"
+            - "5006:5005"
+        volumes:
+            - ./assignment/src:/opt/app/src
+            - ./assignment/target:/opt/app/target
+    executor-pool:
+        container_name: executor-pool
+        build:
+            context: "./executor-pool"
+            dockerfile: "Dockerfile"
+            target: development
+        ports:
+            - "8083:8081"
+            - "5007:5005"
+        volumes:
+            - ./executor-pool/src:/opt/app/src
+            - ./executor-pool/target:/opt/app/target
+    executor1:
+        container_name: executor1
+        build:
+            context: "./executor1"
+            dockerfile: "Dockerfile"
+            target: development
+        ports:
+            - "8084:8081"
+            - "5008:5005"
+        volumes:
+            - ./executor1/src:/opt/app/src
+            - ./executor1/target:/opt/app/target
+    executor2:
+        container_name: executor2
+        build:
+            context: "./executor2"
+            dockerfile: "Dockerfile"
+            target: development
+        ports:
+            - "8085:8085"
+            - "5009:5005"
+        volumes:
+            - ./executor2/src:/opt/app/src
+            - ./executor2/target:/opt/app/target

docker-compose.yml

@@ -1,57 +0,0 @@
-version: "3.0"
-
-services:
-  reverse-proxy:
-    image: traefik:v2.1.3
-    command:
-      - --entrypoints.web.address=:80
-      - --entrypoints.websecure.address=:443
-      - --providers.docker=true
-      - --certificatesResolvers.le.acme.httpChallenge.entryPoint=web
-      - --certificatesresolvers.le.acme.email=martin.eigenmann@unisg.ch
-      - --certificatesresolvers.le.acme.storage=/acme.json
-      - --providers.docker.exposedByDefault=false
-      - --serversTransport.insecureSkipVerify=true
-    ports:
-      - "80:80"
-      - "443:443"
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-      - ./acme.json:/acme.json
-    restart: unless-stopped
-    labels:
-      - "traefik.enable=true"
-      - "traefik.http.routers.http-catchall.rule=hostregexp(`{host:.+}`)"
-      - "traefik.http.routers.http-catchall.entrypoints=web"
-      - "traefik.http.routers.http-catchall.middlewares=redirect-to-https"
-      - "traefik.http.middlewares.redirect-to-https.redirectscheme.scheme=https"
-  
-  tapas-tasks:
-    image: openjdk
-    command: "java -jar /data/tapas-tasks-0.0.1-SNAPSHOT.jar"
-    restart: unless-stopped
-    volumes:
-      - ./:/data/
-    labels:
-      - "traefik.enable=true"
-      - "traefik.http.routers.tapas-tasks.rule=Host(`tapas-tasks.${PUB_IP}.nip.io`)"
-      - "traefik.http.routers.tapas-tasks.service=tapas-tasks"
-      - "traefik.http.services.tapas-tasks.loadbalancer.server.port=8081"
-      - "traefik.http.routers.tapas-tasks.tls=true"
-      - "traefik.http.routers.tapas-tasks.entryPoints=web,websecure"
-      - "traefik.http.routers.tapas-tasks.tls.certresolver=le"
-
-  app:
-    image: openjdk
-    command: "java -jar /data/app-0.1.0.jar"
-    restart: unless-stopped
-    volumes:
-      - ./:/data/
-    labels:
-      - "traefik.enable=true"
-      - "traefik.http.routers.app.rule=Host(`app.${PUB_IP}.nip.io`)"
-      - "traefik.http.routers.app.service=app"
-      - "traefik.http.services.app.loadbalancer.server.port=8080"
-      - "traefik.http.routers.app.tls=true"
-      - "traefik.http.routers.app.entryPoints=web,websecure"
-      - "traefik.http.routers.app.tls.certresolver=le"

executor-base/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

executor-base/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

executor-base/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.2/apache-maven-3.8.2-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

executor-base/Dockerfile

@@ -0,0 +1,18 @@
+FROM openjdk:11 AS development
+
+WORKDIR /opt/app
+
+# ENV SPRING_DATASOURCE_URL=jdbc:mysql://backend-db:3306/db
+
+COPY .mvn/ .mvn
+COPY mvnw pom.xml mvnw.cmd ./
+
+RUN apt-get clean && apt-get update && apt-get install dos2unix
+RUN dos2unix mvnw
+
+RUN ./mvnw dependency:go-offline
+
+COPY src /opt/app/src
+COPY *target /opt/app/target
+
+CMD ["./mvnw", "spring-boot:run", "-Dspring-boot.run.jvmArguments=\"-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005\"", "-Dspring.devtools.restart.enabled=true"]

executor-base/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

executor-base/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

executor-base/pom.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.5</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>ch.unisg</groupId>
+	<artifactId>executorBase</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>executorBase</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+            <groupId>javax.validation</groupId>
+            <artifactId>validation-api</artifactId>
+            <version>1.1.0.Final</version>
+        </dependency>
+
+		<dependency>
+			<groupId>javax.transaction</groupId>
+			<artifactId>javax.transaction-api</artifactId>
+			<version>1.2</version>
+		</dependency>
+
+        <dependency>
+			<groupId>org.json</groupId>
+			<artifactId>json</artifactId>
+			<version>20210307</version>
+		</dependency>
+	</dependencies>
+
+</project>

executor-base/src/main/java/ch/unisg/executorBase/Executor1Application.java

@@ -0,0 +1,13 @@
+package ch.unisg.executorBase;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Executor1Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Executor1Application.class, args);
+	}
+
+}

executor-base/src/main/java/ch/unisg/executorBase/common/SelfValidating.java

@@ -0,0 +1,30 @@
+package ch.unisg.executorBase.common;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.ConstraintViolationException;
+import javax.validation.Validation;
+import javax.validation.Validator;
+import javax.validation.ValidatorFactory;
+import java.util.Set;
+
+public class SelfValidating<T> {
+
+    private Validator validator;
+
+    public SelfValidating() {
+        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
+        validator = factory.getValidator();
+    }
+
+    /**
+     * Evaluates all Bean Validations on the attributes of this
+     * instance.
+     */
+    protected void validateSelf() {
+        @SuppressWarnings("unchecked")
+        Set<ConstraintViolation<T>> violations = validator.validate((T) this);
+        if (!violations.isEmpty()) {
+            throw new ConstraintViolationException(violations);
+        }
+    }
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/in/web/TaskAvailableController.java

@@ -0,0 +1,36 @@
+package ch.unisg.executorBase.executor.adapter.in.web;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+import ch.unisg.executorBase.executor.application.port.in.TaskAvailableCommand;
+import ch.unisg.executorBase.executor.application.port.in.TaskAvailableUseCase;
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+
+@RestController
+public class TaskAvailableController {
+    private final TaskAvailableUseCase taskAvailableUseCase;
+
+    public TaskAvailableController(TaskAvailableUseCase taskAvailableUseCase) {
+        this.taskAvailableUseCase = taskAvailableUseCase;
+    }
+
+    @GetMapping(path = "/newtask/{taskType}")
+    public ResponseEntity<String> retrieveTaskFromTaskList(@PathVariable("taskType") String taskType) {
+
+        if (ExecutorType.contains(taskType.toUpperCase())) {
+            TaskAvailableCommand command = new TaskAvailableCommand(
+                ExecutorType.valueOf(taskType.toUpperCase()));
+            taskAvailableUseCase.newTaskAvailable(command);
+        }
+
+        // Add the content type as a response header
+        HttpHeaders responseHeaders = new HttpHeaders();
+
+        return new ResponseEntity<>("OK", responseHeaders, HttpStatus.OK);
+    }
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/ExecutionFinishedEventAdapter.java

@@ -0,0 +1,50 @@
+package ch.unisg.executorBase.executor.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.JSONObject;
+
+import ch.unisg.executorBase.executor.application.port.out.ExecutionFinishedEventPort;
+import ch.unisg.executorBase.executor.domain.ExecutionFinishedEvent;
+
+public class ExecutionFinishedEventAdapter implements ExecutionFinishedEventPort {
+
+    String server = "http://127.0.0.1:8082";
+
+    Logger logger = Logger.getLogger(ExecutionFinishedEventAdapter.class.getName());
+
+    @Override
+    public void publishExecutionFinishedEvent(ExecutionFinishedEvent event) {
+
+        String body = new JSONObject()
+        .put("taskID", event.getTaskID())
+        .put("result", event.getResult())
+        .put("status", event.getStatus())
+        .toString();
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server+"/task/completed"))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+
+        System.out.println("Finish execution event sent with result:" + event.getResult());
+
+    }
+
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/GetAssignmentAdapter.java

@@ -0,0 +1,61 @@
+package ch.unisg.executorBase.executor.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+import ch.unisg.executorBase.executor.application.port.out.GetAssignmentPort;
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+import ch.unisg.executorBase.executor.domain.Task;
+
+import org.json.JSONObject;
+
+@Component
+@Primary
+public class GetAssignmentAdapter implements GetAssignmentPort {
+
+    String server = "http://127.0.0.1:8082";
+
+    Logger logger = Logger.getLogger(GetAssignmentAdapter.class.getName());
+
+    @Override
+    public Task getAssignment(ExecutorType executorType, String ip, int port) {
+
+        String body = new JSONObject()
+                  .put("executorType", executorType)
+                  .put("ip", ip)
+                  .put("port", port)
+                  .toString();
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server+"/task/apply"))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+        try {
+            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+            if (response.body().equals("")) {
+                return null;
+            }
+
+            return new Task(new JSONObject(response.body()).getString("taskID"));
+
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+
+        return null;
+    }
+
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/NotifyExecutorPoolAdapter.java

@@ -0,0 +1,57 @@
+package ch.unisg.executorBase.executor.adapter.out.web;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.JSONObject;
+import org.springframework.context.annotation.Primary;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+
+import ch.unisg.executorBase.executor.application.port.out.NotifyExecutorPoolPort;
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+
+@Component
+@Primary
+public class NotifyExecutorPoolAdapter implements NotifyExecutorPoolPort {
+
+    String server = "http://127.0.0.1:8083";
+
+    Logger logger = Logger.getLogger(NotifyExecutorPoolAdapter.class.getName());
+
+    @Override
+    public boolean notifyExecutorPool(String ip, int port, ExecutorType executorType) {
+
+        String body = new JSONObject()
+            .put("executorTaskType", executorType)
+            .put("executorIp", ip)
+            .put("executorPort", Integer.toString(port))
+            .toString();
+
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(server+"/executor-pool/AddExecutor"))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+        try {
+            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+            if (response.statusCode() == HttpStatus.CREATED.value()) {
+                return true;
+            }
+        } catch (IOException | InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            // Restore interrupted state...
+            Thread.currentThread().interrupt();
+        }
+
+         return false;
+    }
+
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/in/TaskAvailableCommand.java

@@ -0,0 +1,20 @@
+package ch.unisg.executorBase.executor.application.port.in;
+
+import ch.unisg.executorBase.common.SelfValidating;
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+
+import javax.validation.constraints.NotNull;
+
+import lombok.Value;
+
+@Value
+public class TaskAvailableCommand extends SelfValidating<TaskAvailableCommand> {
+
+    @NotNull
+    private final ExecutorType taskType;
+
+    public TaskAvailableCommand(ExecutorType taskType) {
+        this.taskType = taskType;
+        this.validateSelf();
+    }
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/in/TaskAvailableUseCase.java

@@ -0,0 +1,5 @@
+package ch.unisg.executorBase.executor.application.port.in;
+
+public interface TaskAvailableUseCase {
+    void newTaskAvailable(TaskAvailableCommand command);
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/ExecutionFinishedEventPort.java

@@ -0,0 +1,7 @@
+package ch.unisg.executorBase.executor.application.port.out;
+
+import ch.unisg.executorBase.executor.domain.ExecutionFinishedEvent;
+
+public interface ExecutionFinishedEventPort {
+    void publishExecutionFinishedEvent(ExecutionFinishedEvent event);
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/GetAssignmentPort.java

@@ -0,0 +1,8 @@
+package ch.unisg.executorBase.executor.application.port.out;
+
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+import ch.unisg.executorBase.executor.domain.Task;
+
+public interface GetAssignmentPort {
+    Task getAssignment(ExecutorType executorType, String ip, int port);
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/NotifyExecutorPoolPort.java

@@ -0,0 +1,7 @@
+package ch.unisg.executorBase.executor.application.port.out;
+
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+
+public interface NotifyExecutorPoolPort {
+    boolean notifyExecutorPool(String ip, int port, ExecutorType executorType);
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/service/NotifyExecutorPoolService.java

@@ -0,0 +1,15 @@
+package ch.unisg.executorBase.executor.application.service;
+
+import ch.unisg.executorBase.executor.application.port.out.NotifyExecutorPoolPort;
+import ch.unisg.executorBase.executor.domain.ExecutorType;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class NotifyExecutorPoolService {
+
+	private final NotifyExecutorPoolPort notifyExecutorPoolPort;
+
+	public boolean notifyExecutorPool(String ip, int port, ExecutorType executorType) {
+		return notifyExecutorPoolPort.notifyExecutorPool(ip, port, executorType);
+	}
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/application/service/TaskAvailableService.java

@@ -0,0 +1,20 @@
+package ch.unisg.executorBase.executor.application.service;
+
+import org.springframework.stereotype.Component;
+
+import ch.unisg.executorBase.executor.application.port.in.TaskAvailableCommand;
+import ch.unisg.executorBase.executor.application.port.in.TaskAvailableUseCase;
+import lombok.RequiredArgsConstructor;
+
+import javax.transaction.Transactional;
+
+@RequiredArgsConstructor
+@Component
+@Transactional
+public class TaskAvailableService implements TaskAvailableUseCase {
+
+    @Override
+    public void newTaskAvailable(TaskAvailableCommand command) {
+      // Placeholder so spring can create a bean
+    }
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutionFinishedEvent.java

@@ -0,0 +1,21 @@
+package ch.unisg.executorBase.executor.domain;
+
+import lombok.Getter;
+
+public class ExecutionFinishedEvent {
+    
+    @Getter
+    private String taskID;
+    
+    @Getter
+    private String result;
+
+    @Getter
+    private String status;
+
+    public ExecutionFinishedEvent(String taskID, String result, String status) {
+        this.taskID = taskID;
+        this.result = result;
+        this.status = status;
+    }
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorBase.java

@@ -0,0 +1,75 @@
+package ch.unisg.executorBase.executor.domain;
+
+import ch.unisg.executorBase.executor.application.port.out.ExecutionFinishedEventPort;
+import ch.unisg.executorBase.executor.application.port.out.GetAssignmentPort;
+import ch.unisg.executorBase.executor.application.port.out.NotifyExecutorPoolPort;
+
+import ch.unisg.executorBase.executor.adapter.out.web.ExecutionFinishedEventAdapter;
+import ch.unisg.executorBase.executor.adapter.out.web.GetAssignmentAdapter;
+import ch.unisg.executorBase.executor.adapter.out.web.NotifyExecutorPoolAdapter;
+import ch.unisg.executorBase.executor.application.service.NotifyExecutorPoolService;
+import lombok.Getter;
+
+public abstract class ExecutorBase {
+
+    @Getter
+    private String ip;
+
+    @Getter
+    private ExecutorType executorType;
+
+    @Getter
+    private int port;
+
+    @Getter
+    private ExecutorStatus status;
+
+    // TODO Violation of the Dependency Inversion Principle?, but we havn't really got a better solutions to send a http request / access a service from a domain model
+    // TODO I guess we can somehow autowire this but I don't know why it's not working :D
+    private final NotifyExecutorPoolPort notifyExecutorPoolPort = new NotifyExecutorPoolAdapter();
+	private final NotifyExecutorPoolService notifyExecutorPoolService = new NotifyExecutorPoolService(notifyExecutorPoolPort);
+    private final GetAssignmentPort getAssignmentPort = new GetAssignmentAdapter();
+    private final ExecutionFinishedEventPort executionFinishedEventPort = new ExecutionFinishedEventAdapter();
+
+    public ExecutorBase(ExecutorType executorType) {
+        System.out.println("Starting Executor");
+        // TODO set this automaticly
+        this.ip = "localhost";
+        this.port = 8084;
+        this.executorType = executorType;
+
+        this.status = ExecutorStatus.STARTING_UP;
+        if(!notifyExecutorPoolService.notifyExecutorPool(this.ip, this.port, this.executorType)) {
+            System.exit(0);
+        } else {
+            this.status = ExecutorStatus.IDLING;
+            getAssignment();
+        }
+    }
+
+    public void getAssignment() {
+        Task newTask = getAssignmentPort.getAssignment(this.getExecutorType(), this.getIp(),
+            this.getPort());
+        if (newTask != null) {
+            this.executeTask(newTask);
+        } else {
+            this.status = ExecutorStatus.IDLING;
+        }
+    }
+
+    private void executeTask(Task task) {
+        System.out.println("Starting execution");
+        this.status = ExecutorStatus.EXECUTING;
+
+        task.setResult(execution());
+
+        executionFinishedEventPort.publishExecutionFinishedEvent(
+            new ExecutionFinishedEvent(task.getTaskID(), task.getResult(), "SUCCESS"));
+
+        System.out.println("Finish execution");
+        getAssignment();
+    }
+
+    protected abstract String execution();
+
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorStatus.java

@@ -0,0 +1,7 @@
+package ch.unisg.executorBase.executor.domain;
+
+public enum ExecutorStatus {
+    STARTING_UP,
+    EXECUTING,
+    IDLING,
+}

executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorType.java

@@ -0,0 +1,18 @@
+package ch.unisg.executorBase.executor.domain;
+
+public enum ExecutorType {
+    ADDITION, ROBOT;
+
+    public static boolean contains(String test) {
+
+        for (ExecutorType x : ExecutorType.values()) {
+            if (x.name().equals(test)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
+
+
+

executor-base/src/main/java/ch/unisg/executorBase/executor/domain/Task.java

@@ -0,0 +1,19 @@
+package ch.unisg.executorBase.executor.domain;
+
+import lombok.Getter;
+import lombok.Setter;
+
+public class Task {
+
+    @Getter
+    private String taskID;
+
+    @Getter
+    @Setter
+    private String result;
+
+    public Task(String taskID) {
+        this.taskID = taskID;
+    }
+
+}

executor-base/src/main/resources/application.properties

@@ -0,0 +1 @@
+server.port=8081

executor-base/src/test/java/ch/unisg/executorBase/Executor1ApplicationTests.java

@@ -0,0 +1,13 @@
+package ch.unisg.executorBase;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class executorBaseApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

executor-pool/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

executor-pool/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

executor-pool/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.2/apache-maven-3.8.2-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

executor-pool/Dockerfile

@@ -0,0 +1,18 @@
+FROM openjdk:11 AS development
+
+WORKDIR /opt/app
+
+# ENV SPRING_DATASOURCE_URL=jdbc:mysql://backend-db:3306/db
+
+COPY .mvn/ .mvn
+COPY mvnw pom.xml mvnw.cmd ./
+
+RUN apt-get clean && apt-get update && apt-get install dos2unix
+RUN dos2unix mvnw
+
+RUN ./mvnw dependency:go-offline
+
+COPY src /opt/app/src
+COPY *target /opt/app/target
+
+CMD ["./mvnw", "spring-boot:run", "-Dspring-boot.run.jvmArguments=\"-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005\"", "-Dspring.devtools.restart.enabled=true"]

executor-pool/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

executor-pool/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

executor-pool/pom.xml

@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.5</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>ch.unisg</groupId>
+	<artifactId>executor-pool</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>executor-pool</name>
+	<description>Executor Pool</description>
+	<properties>
+		<java.version>11</java.version>
+		<sonar.organization>scs-asse-fs21-group1</sonar.organization>
+		<sonar.host.url>https://sonarcloud.io</sonar.host.url>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.json</groupId>
+			<artifactId>json</artifactId>
+			<version>20210307</version>
+		</dependency>
+        <dependency>
+            <groupId>javax.validation</groupId>
+            <artifactId>validation-api</artifactId>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>jakarta.validation</groupId>
+            <artifactId>jakarta.validation-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>javax.transaction</groupId>
+            <artifactId>javax.transaction-api</artifactId>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

executor-pool/src/main/java/ch/unisg/common/SelfValidating.java

@@ -0,0 +1,30 @@
+package ch.unisg.common;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.ConstraintViolationException;
+import javax.validation.Validation;
+import javax.validation.Validator;
+import javax.validation.ValidatorFactory;
+import java.util.Set;
+
+public class SelfValidating<T> {
+
+    private Validator validator;
+
+    public SelfValidating() {
+        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
+        validator = factory.getValidator();
+    }
+
+    /**
+     * Evaluates all Bean Validations on the attributes of this
+     * instance.
+     */
+    protected void validateSelf() {
+        @SuppressWarnings("unchecked")
+        Set<ConstraintViolation<T>> violations = validator.validate((T) this);
+        if (!violations.isEmpty()) {
+            throw new ConstraintViolationException(violations);
+        }
+    }
+}

executor-pool/src/main/java/ch/unisg/executorpool/ExecutorPoolApplication.java

@@ -0,0 +1,13 @@
+package ch.unisg.executorpool;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ExecutorPoolApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ExecutorPoolApplication.class, args);
+	}
+
+}