2021-11-21 20:18:15 +00:00
295 changed files with 7924 additions and 1793 deletions
--- a/.deployment/docker-compose.yml
+++ b/.deployment/docker-compose.yml
@ -41,20 +41,35 @@ services:
            - "traefik.http.routers.tapas-tasks.entryPoints=web,websecure"
            - "traefik.http.routers.tapas-tasks.tls.certresolver=le"

-    assignment:
+    tapas-auction-house:
        image: openjdk
-        command: "java -jar /data/assignment-0.0.1-SNAPSHOT.jar"
+        command: "java -jar /data/tapas-auction-house-0.0.1-SNAPSHOT.jar"
        restart: unless-stopped
        volumes:
            - ./:/data/
        labels:
            - "traefik.enable=true"
-            - "traefik.http.routers.assignment.rule=Host(`assignment.${PUB_IP}.nip.io`)"
-            - "traefik.http.routers.assignment.service=assignment"
-            - "traefik.http.services.assignment.loadbalancer.server.port=8082"
-            - "traefik.http.routers.assignment.tls=true"
-            - "traefik.http.routers.assignment.entryPoints=web,websecure"
-            - "traefik.http.routers.assignment.tls.certresolver=le"
+            - "traefik.http.routers.tapas-auction-house.rule=Host(`tapas-auction-house.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.tapas-auction-house.service=tapas-auction-house"
+            - "traefik.http.services.tapas-auction-house.loadbalancer.server.port=8086"
+            - "traefik.http.routers.tapas-auction-house.tls=true"
+            - "traefik.http.routers.tapas-auction-house.entryPoints=web,websecure"
+            - "traefik.http.routers.tapas-auction-house.tls.certresolver=le"
+
+    roster:
+        image: openjdk
+        command: "java -jar /data/roster-0.0.1-SNAPSHOT.jar"
+        restart: unless-stopped
+        volumes:
+            - ./:/data/
+        labels:
+            - "traefik.enable=true"
+            - "traefik.http.routers.roster.rule=Host(`roster.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.roster.service=roster"
+            - "traefik.http.services.roster.loadbalancer.server.port=8082"
+            - "traefik.http.routers.roster.tls=true"
+            - "traefik.http.routers.roster.entryPoints=web,websecure"
+            - "traefik.http.routers.roster.tls.certresolver=le"

    executor-pool:
        image: openjdk
@ -71,38 +86,38 @@ services:
            - "traefik.http.routers.executor-pool.entryPoints=web,websecure"
            - "traefik.http.routers.executor-pool.tls.certresolver=le"

-    executor1:
+    executor-computation:
        image: openjdk
-        command: "java -jar /data/executor1-0.0.1-SNAPSHOT.jar"
+        command: "java -jar /data/executor-computation-0.0.1-SNAPSHOT.jar"
        restart: unless-stopped
        depends_on:
            - executor-pool
-            - assignment
+            - roster
        volumes:
            - ./:/data/
        labels:
            - "traefik.enable=true"
-            - "traefik.http.routers.executor1.rule=Host(`executor1.${PUB_IP}.nip.io`)"
-            - "traefik.http.routers.executor1.service=executor1"
-            - "traefik.http.services.executor1.loadbalancer.server.port=8084"
-            - "traefik.http.routers.executor1.tls=true"
-            - "traefik.http.routers.executor1.entryPoints=web,websecure"
-            - "traefik.http.routers.executor1.tls.certresolver=le"
+            - "traefik.http.routers.executor-computation.rule=Host(`executor-computation.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.executor-computation.service=executor-computation"
+            - "traefik.http.services.executor-computation.loadbalancer.server.port=8084"
+            - "traefik.http.routers.executor-computation.tls=true"
+            - "traefik.http.routers.executor-computation.entryPoints=web,websecure"
+            - "traefik.http.routers.executor-computation.tls.certresolver=le"

-    executor2:
+    executor-robot:
        image: openjdk
-        command: "java -jar /data/executor2-0.0.1-SNAPSHOT.jar"
+        command: "java -jar /data/executor-robot-0.0.1-SNAPSHOT.jar"
        restart: unless-stopped
        depends_on:
            - executor-pool
-            - assignment
+            - roster
        volumes:
            - ./:/data/
        labels:
            - "traefik.enable=true"
-            - "traefik.http.routers.executor2.rule=Host(`executor2.${PUB_IP}.nip.io`)"
-            - "traefik.http.routers.executor2.service=executor2"
-            - "traefik.http.services.executor2.loadbalancer.server.port=8085"
-            - "traefik.http.routers.executor2.tls=true"
-            - "traefik.http.routers.executor2.entryPoints=web,websecure"
-            - "traefik.http.routers.executor2.tls.certresolver=le"
+            - "traefik.http.routers.executor-robot.rule=Host(`executor-robot.${PUB_IP}.nip.io`)"
+            - "traefik.http.routers.executor-robot.service=executor-robot"
+            - "traefik.http.services.executor-robot.loadbalancer.server.port=8085"
+            - "traefik.http.routers.executor-robot.tls=true"
+            - "traefik.http.routers.executor-robot.entryPoints=web,websecure"
+            - "traefik.http.routers.executor-robot.tls.certresolver=le"
--- a/.github/workflows/build-and-deploy.yml
+++ b/.github/workflows/build-and-deploy.yml
@ -33,29 +33,36 @@ jobs:
                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
                  restore-keys: ${{ runner.os }}-m2

-            - name: Build with Maven
-              run: mvn -f assignment/pom.xml --batch-mode --update-snapshots verify
-            - run: cp ./assignment/target/assignment-0.0.1-SNAPSHOT.jar ./target
+            - name: Build common library
+              run: mvn -f common/pom.xml --batch-mode --update-snapshots install

-            - name: Build with Maven
+            - name: Build roster service
+              run: mvn -f roster/pom.xml --batch-mode --update-snapshots verify
+            - run: cp ./roster/target/roster-0.0.1-SNAPSHOT.jar ./target
+
+            - name: Build executor-pool service
              run: mvn -f executor-pool/pom.xml --batch-mode --update-snapshots verify
            - run: cp ./executor-pool/target/executor-pool-0.0.1-SNAPSHOT.jar ./target

-            - name: Build with Maven
+            - name: Build executor-base library
              run: mvn -f executor-base/pom.xml --batch-mode --update-snapshots install

-            - name: Build with Maven
-              run: mvn -f executor1/pom.xml --batch-mode --update-snapshots verify
-            - run: cp ./executor1/target/executor1-0.0.1-SNAPSHOT.jar ./target
+            - name: Build executor-computation service
+              run: mvn -f executor-computation/pom.xml --batch-mode --update-snapshots verify
+            - run: cp ./executor-computation/target/executor-computation-0.0.1-SNAPSHOT.jar ./target

-            - name: Build with Maven
-              run: mvn -f executor2/pom.xml --batch-mode --update-snapshots verify
-            - run: cp ./executor2/target/executor2-0.0.1-SNAPSHOT.jar ./target
+            - name: Build executor-robot service
+              run: mvn -f executor-robot/pom.xml --batch-mode --update-snapshots verify
+            - run: cp ./executor-robot/target/executor-robot-0.0.1-SNAPSHOT.jar ./target

-            - name: Build with Maven
+            - name: Build tapas-task service
              run: mvn -f tapas-tasks/pom.xml --batch-mode --update-snapshots verify
            - run: cp ./tapas-tasks/target/tapas-tasks-0.0.1-SNAPSHOT.jar ./target

+            - name: Build tapas-auction-house service
+              run: mvn -f tapas-auction-house/pom.xml --batch-mode --update-snapshots verify
+            - run: cp ./tapas-auction-house/target/tapas-auction-house-0.0.1-SNAPSHOT.jar ./target
+
            - run: cp ./.deployment/docker-compose.yml ./target
            - name: Archive artifacts
              uses: actions/upload-artifact@v1
--- a/.github/workflows/ci.assignment.yml
+++ b/.github/workflows/ci.assignment.yml
@ -1,41 +0,0 @@
-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
--- a/.github/workflows/ci.executor-computation.yml
+++ b/.github/workflows/ci.executor-computation.yml
@ -1,15 +1,17 @@
-name: CI Executor 2
+name: CI executor-computation
 on:
    push:
        branches: [main, dev]
        paths:
            - "executor-base/**"
-            - "executor2/**"
+            - "executor-computation/**"
+            - "common/**"
    pull_request:
        branches: [main, dev]
        paths:
            - "executor-base/**"
-            - "executor2/**"
+            - "executor-computation/**"
+            - "common/**"

    workflow_dispatch:
 jobs:
@ -36,10 +38,12 @@ jobs:
                  path: ~/.m2
                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
                  restore-keys: ${{ runner.os }}-m2
+            - name: Build common
+              run: mvn -f common/pom.xml -B install
            - 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
+              run: mvn -f executor-computation/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-executor2
--- a/.github/workflows/ci.executor-robot.yml
+++ b/.github/workflows/ci.executor-robot.yml
@ -1,15 +1,17 @@
-name: CI Executor 1
+name: CI executor-robot
 on:
    push:
        branches: [main, dev]
        paths:
            - "executor-base/**"
-            - "executor1/**"
+            - "executor-robot/**"
+            - "common/**"
    pull_request:
        branches: [main, dev]
        paths:
            - "executor-base/**"
-            - "executor1/**"
+            - "executor-robot/**"
+            - "common/**"

    workflow_dispatch:
 jobs:
@ -36,10 +38,12 @@ jobs:
                  path: ~/.m2
                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
                  restore-keys: ${{ runner.os }}-m2
+            - name: Build executorBase
+              run: mvn -f common/pom.xml -B install
            - 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
+              run: mvn -f executor-robot/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-executor1
--- a/.github/workflows/ci.roster.yml
+++ b/.github/workflows/ci.roster.yml
@ -0,0 +1,45 @@
+name: CI Roster
+on:
+    push:
+        branches: [main, dev]
+        paths:
+            - "roster/**"
+            - "common/**"
+    pull_request:
+        branches: [main, dev]
+        paths:
+            - "roster/**"
+            - "common/**"
+
+    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 common package
+              run: mvn -f common/pom.xml -B install
+            - name: Build and analyze
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+              run: mvn -f roster/pom.xml -B verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=scs-asse-fs21-group1_tapas-assignment
--- a/assignment/src/main/java/ch/unisg/assignment/AssignmentApplication.java
+++ b/assignment/src/main/java/ch/unisg/assignment/AssignmentApplication.java
@ -1,13 +0,0 @@
-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);
-	}
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/adapter/in/web/WebControllerExceptionHandler.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/adapter/in/web/WebControllerExceptionHandler.java
@ -1,31 +0,0 @@
-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());
-
-      }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishNewTaskEventAdapter.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishNewTaskEventAdapter.java
@ -1,60 +0,0 @@
-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();
-        }
-    }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishTaskAssignedEventAdapter.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/adapter/out/web/PublishTaskAssignedEventAdapter.java
@ -1,50 +0,0 @@
-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();
-        }
-    }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/ApplyForTaskCommand.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/ApplyForTaskCommand.java
@ -1,32 +0,0 @@
-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();
-    }
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/ApplyForTaskUseCase.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/in/ApplyForTaskUseCase.java
@ -1,7 +0,0 @@
-package ch.unisg.assignment.assignment.application.port.in;
-
-import ch.unisg.assignment.assignment.domain.Task;
-
-public interface ApplyForTaskUseCase {
-    Task applyForTask(ApplyForTaskCommand applyForTaskCommand);
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/GetAllExecutorInExecutorPoolByTypePort.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/GetAllExecutorInExecutorPoolByTypePort.java
@ -1,9 +0,0 @@
-package ch.unisg.assignment.assignment.application.port.out;
-
-import ch.unisg.assignment.assignment.domain.valueobject.ExecutorType;
-
-public interface GetAllExecutorInExecutorPoolByTypePort {
-    boolean doesExecutorTypeExist(ExecutorType type);
-}
-
-
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/NewTaskEventPort.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/NewTaskEventPort.java
@ -1,7 +0,0 @@
-package ch.unisg.assignment.assignment.application.port.out;
-
-import ch.unisg.assignment.assignment.domain.event.NewTaskEvent;
-
-public interface NewTaskEventPort {
-    void publishNewTaskEvent(NewTaskEvent event);
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/TaskAssignedEventPort.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/TaskAssignedEventPort.java
@ -1,7 +0,0 @@
-package ch.unisg.assignment.assignment.application.port.out;
-
-import ch.unisg.assignment.assignment.domain.event.TaskAssignedEvent;
-
-public interface TaskAssignedEventPort {
-    void publishTaskAssignedEvent(TaskAssignedEvent taskAssignedEvent);
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/TaskCompletedEventPort.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/port/out/TaskCompletedEventPort.java
@ -1,7 +0,0 @@
-package ch.unisg.assignment.assignment.application.port.out;
-
-import ch.unisg.assignment.assignment.domain.event.TaskCompletedEvent;
-
-public interface TaskCompletedEventPort {
-    void publishTaskCompleted(TaskCompletedEvent event);
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/service/ApplyForTaskService.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/service/ApplyForTaskService.java
@ -1,34 +0,0 @@
-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;
-    }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/application/service/NewTaskService.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/application/service/NewTaskService.java
@ -1,46 +0,0 @@
-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;
-    }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/domain/ExecutorInfo.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/domain/ExecutorInfo.java
@ -1,21 +0,0 @@
-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;
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/domain/Roster.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/domain/Roster.java
@ -1,53 +0,0 @@
-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);
-    }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/domain/RosterItem.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/domain/RosterItem.java
@ -1,29 +0,0 @@
-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;
-    }
-
-}
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/IP4Adress.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/IP4Adress.java
@ -1,23 +0,0 @@
-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();
-        }
-    }
-}
-
-
-
-
-
--- a/assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/Port.java
+++ b/assignment/src/main/java/ch/unisg/assignment/assignment/domain/valueobject/Port.java
@ -1,17 +0,0 @@
-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();
-        }
-    }
-}
--- a/assignment/src/main/java/ch/unisg/assignment/common/exception/InvalidIP4Exception.java
+++ b/assignment/src/main/java/ch/unisg/assignment/common/exception/InvalidIP4Exception.java
@ -1,7 +0,0 @@
-package ch.unisg.assignment.common.exception;
-
-public class InvalidIP4Exception extends Exception {
-    public InvalidIP4Exception() {
-        super("IP4 is invalid");
-    }
-}
--- a/assignment/src/main/java/ch/unisg/assignment/common/exception/PortOutOfRangeException.java
+++ b/assignment/src/main/java/ch/unisg/assignment/common/exception/PortOutOfRangeException.java
@ -1,7 +0,0 @@
-package ch.unisg.assignment.common.exception;
-
-public class PortOutOfRangeException extends Exception {
-    public PortOutOfRangeException() {
-        super("Port is out of available range (1024-65535)");
-    }
-}
--- a/assignment/src/main/resources/application.properties
+++ b/assignment/src/main/resources/application.properties
@ -1 +0,0 @@
-server.port=8082
--- a/assignment/.mvn/wrapper/MavenWrapperDownloader.java
+++ b/assignment/.mvn/wrapper/MavenWrapperDownloader.java
--- a/assignment/.mvn/wrapper/maven-wrapper.jar
+++ b/assignment/.mvn/wrapper/maven-wrapper.jar
--- a/assignment/.mvn/wrapper/maven-wrapper.properties
+++ b/assignment/.mvn/wrapper/maven-wrapper.properties
--- a/assignment/mvnw
+++ b/assignment/mvnw
--- a/assignment/mvnw.cmd
+++ b/assignment/mvnw.cmd
--- a/common/pom.xml
+++ b/common/pom.xml
@ -0,0 +1,72 @@
+<?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>
+  <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>common</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+
+  <name>common</name>
+  <!-- FIXME change it to the project's website -->
+  <url>http://www.example.com</url>
+
+  <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>
--- a/assignment/src/main/java/ch/unisg/assignment/common/exception/ErrorResponse.java
+++ b/assignment/src/main/java/ch/unisg/assignment/common/exception/ErrorResponse.java
@ -1,4 +1,4 @@
-package ch.unisg.assignment.common.exception;
+package ch.unisg.common.exception;

 import org.springframework.http.HttpStatus;

--- a/common/src/main/java/ch/unisg/common/exception/InvalidExecutorURIException.java
+++ b/common/src/main/java/ch/unisg/common/exception/InvalidExecutorURIException.java
@ -0,0 +1,7 @@
+package ch.unisg.common.exception;
+
+public class InvalidExecutorURIException extends Exception {
+    public InvalidExecutorURIException() {
+        super("URI is invalid");
+    }
+}
--- a/assignment/src/main/java/ch/unisg/assignment/common/SelfValidating.java
+++ b/assignment/src/main/java/ch/unisg/assignment/common/SelfValidating.java
@ -1,4 +1,4 @@
-package ch.unisg.assignment.common;
+package ch.unisg.common.validation;

 import javax.validation.ConstraintViolation;
 import javax.validation.ConstraintViolationException;
--- a/common/src/main/java/ch/unisg/common/valueobject/ExecutorURI.java
+++ b/common/src/main/java/ch/unisg/common/valueobject/ExecutorURI.java
@ -0,0 +1,13 @@
+package ch.unisg.common.valueobject;
+
+import java.net.URI;
+import lombok.Value;
+
+@Value
+public class ExecutorURI {
+    private URI value;
+
+    public ExecutorURI(String uri) {
+        this.value = URI.create(uri);
+    }
+}
--- a/diagram_1.bpmn
+++ b/diagram_1.bpmn
@ -1,653 +0,0 @@
-<?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" />
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-      </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>
--- a/doc/workflow.bpmn
+++ b/doc/workflow.bpmn
@ -0,0 +1,337 @@
+<?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_0grlf6g" 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_0p9il2x">
+    <bpmn:participant id="Participant_06nkquo" name="Task Service" processRef="Process_12mqbju" />
+    <bpmn:participant id="Participant_016oseg" name="Roster Service" processRef="Process_1s4t9qw" />
+    <bpmn:participant id="Participant_11sfrgz" name="Executor Pool" processRef="Process_0bur8vc" />
+    <bpmn:participant id="Participant_1x7nd70" name="executor" processRef="Process_1wq3sju" />
+    <bpmn:messageFlow id="Flow_14smr2g" sourceRef="Activity_13xp2vr" targetRef="Activity_0iljjpd" />
+    <bpmn:messageFlow id="Flow_1pr8430" name="Get All available executors" sourceRef="Activity_0iljjpd" targetRef="Activity_0qbi1wr" />
+    <bpmn:messageFlow id="Flow_0je874m" name="Return executorlist" sourceRef="Activity_0qbi1wr" targetRef="Activity_05ck4dv" />
+    <bpmn:messageFlow id="Flow_0z85582" name="notify executor about new tasks in event channel" sourceRef="Activity_0qh2a6b" targetRef="Activity_0feawyi" />
+    <bpmn:messageFlow id="Flow_02hwoew" sourceRef="Activity_1hdmlbq" targetRef="Activity_0x47yx9" />
+    <bpmn:messageFlow id="Flow_0jg4g6h" name="return task informations" sourceRef="Activity_0a4kzh7" targetRef="Activity_12tzfd7" />
+    <bpmn:messageFlow id="Flow_1ejujjc" name="Notify about status change" sourceRef="Activity_0a4kzh7" targetRef="Activity_0fiiuon" />
+    <bpmn:messageFlow id="Flow_1gknjes" name="Notify about task finish" sourceRef="Activity_1f06uud" targetRef="Activity_01iahon" />
+    <bpmn:messageFlow id="Flow_0fihv5s" name="return task results" sourceRef="Activity_12tzfd7" targetRef="Activity_1f06uud" />
+    <bpmn:messageFlow id="Flow_1qv7s55" name="Sends started message to executor pool" sourceRef="Activity_1r2yhx0" targetRef="Activity_14xojfa" />
+    <bpmn:messageFlow id="Flow_1l0z3bv" name="Return success message if added" sourceRef="Activity_14xojfa" targetRef="Activity_09ae5r2" />
+  </bpmn:collaboration>
+  <bpmn:process id="Process_12mqbju" isExecutable="true">
+    <bpmn:task id="Activity_0fiiuon" name="Change status to assigned" />
+    <bpmn:task id="Activity_01iahon" name="Update status and task" />
+    <bpmn:task id="Activity_13xp2vr" name="Task created" />
+  </bpmn:process>
+  <bpmn:process id="Process_1s4t9qw" isExecutable="false">
+    <bpmn:exclusiveGateway id="Gateway_0sqs3j7">
+      <bpmn:incoming>Flow_1rie16h</bpmn:incoming>
+      <bpmn:outgoing>Flow_159tlyd</bpmn:outgoing>
+      <bpmn:outgoing>Flow_01pbz6s</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_0qh2a6b" name="Add task to task queue">
+      <bpmn:incoming>Flow_159tlyd</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:task id="Activity_005fqxd" name="Auction House">
+      <bpmn:incoming>Flow_01pbz6s</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:task id="Activity_0x47yx9" name="Check if task available for this executor">
+      <bpmn:outgoing>Flow_1urp3d2</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:exclusiveGateway id="Gateway_1apm7h8">
+      <bpmn:incoming>Flow_1urp3d2</bpmn:incoming>
+      <bpmn:outgoing>Flow_1oy6e8u</bpmn:outgoing>
+      <bpmn:outgoing>Flow_1rxws1j</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_1v2mt3m" name="Return no task available">
+      <bpmn:incoming>Flow_1oy6e8u</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:task id="Activity_0a4kzh7" name="Assign executor to task and add to roster">
+      <bpmn:incoming>Flow_1rxws1j</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:task id="Activity_1f06uud" name="Remove assignment from roster" />
+    <bpmn:task id="Activity_0iljjpd" name="Receive Task" />
+    <bpmn:task id="Activity_05ck4dv" name="Check if executor is available">
+      <bpmn:outgoing>Flow_1rie16h</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:sequenceFlow id="Flow_1rie16h" sourceRef="Activity_05ck4dv" targetRef="Gateway_0sqs3j7" />
+    <bpmn:sequenceFlow id="Flow_159tlyd" name="Yes" sourceRef="Gateway_0sqs3j7" targetRef="Activity_0qh2a6b" />
+    <bpmn:sequenceFlow id="Flow_01pbz6s" name="No" sourceRef="Gateway_0sqs3j7" targetRef="Activity_005fqxd" />
+    <bpmn:sequenceFlow id="Flow_1urp3d2" sourceRef="Activity_0x47yx9" targetRef="Gateway_1apm7h8" />
+    <bpmn:sequenceFlow id="Flow_1oy6e8u" name="No" sourceRef="Gateway_1apm7h8" targetRef="Activity_1v2mt3m" />
+    <bpmn:sequenceFlow id="Flow_1rxws1j" sourceRef="Gateway_1apm7h8" targetRef="Activity_0a4kzh7" />
+  </bpmn:process>
+  <bpmn:process id="Process_0bur8vc" isExecutable="false">
+    <bpmn:task id="Activity_0qbi1wr" name="Retrieve executors by type" />
+    <bpmn:task id="Activity_14xojfa" name="Adds executor to pool" />
+  </bpmn:process>
+  <bpmn:process id="Process_1wq3sju" isExecutable="false">
+    <bpmn:task id="Activity_0feawyi" name="check if right tasktype and if idling">
+      <bpmn:outgoing>Flow_0nuuhk7</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:exclusiveGateway id="Gateway_0nyndyn">
+      <bpmn:incoming>Flow_0nuuhk7</bpmn:incoming>
+      <bpmn:outgoing>Flow_197gie6</bpmn:outgoing>
+      <bpmn:outgoing>Flow_0ruufha</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_1v0d9zm" name="Do nothing">
+      <bpmn:incoming>Flow_197gie6</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:task id="Activity_12tzfd7" name="Execute task" />
+    <bpmn:task id="Activity_1hdmlbq" name="Apply for Assignment">
+      <bpmn:incoming>Flow_0ruufha</bpmn:incoming>
+      <bpmn:incoming>Flow_1duwugb</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:task id="Activity_1r2yhx0" name="Executor Starts" />
+    <bpmn:task id="Activity_09ae5r2" name="Was startup successfull">
+      <bpmn:outgoing>Flow_19m4xhk</bpmn:outgoing>
+    </bpmn:task>
+    <bpmn:exclusiveGateway id="Gateway_1o0lihs">
+      <bpmn:incoming>Flow_19m4xhk</bpmn:incoming>
+      <bpmn:outgoing>Flow_0b4g73l</bpmn:outgoing>
+      <bpmn:outgoing>Flow_1duwugb</bpmn:outgoing>
+    </bpmn:exclusiveGateway>
+    <bpmn:task id="Activity_0n6hvhw" name="Shut down">
+      <bpmn:incoming>Flow_0b4g73l</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:sequenceFlow id="Flow_0nuuhk7" sourceRef="Activity_0feawyi" targetRef="Gateway_0nyndyn" />
+    <bpmn:sequenceFlow id="Flow_197gie6" name="No" sourceRef="Gateway_0nyndyn" targetRef="Activity_1v0d9zm" />
+    <bpmn:sequenceFlow id="Flow_0ruufha" sourceRef="Gateway_0nyndyn" targetRef="Activity_1hdmlbq" />
+    <bpmn:sequenceFlow id="Flow_19m4xhk" sourceRef="Activity_09ae5r2" targetRef="Gateway_1o0lihs" />
+    <bpmn:sequenceFlow id="Flow_0b4g73l" name="No" sourceRef="Gateway_1o0lihs" targetRef="Activity_0n6hvhw" />
+    <bpmn:sequenceFlow id="Flow_1duwugb" name="Yes" sourceRef="Gateway_1o0lihs" targetRef="Activity_1hdmlbq" />
+  </bpmn:process>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Collaboration_0p9il2x">
+      <bpmndi:BPMNShape id="Participant_016oseg_di" bpmnElement="Participant_016oseg" isHorizontal="true">
+        <dc:Bounds x="160" y="310" width="1950" height="260" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_1rie16h_di" bpmnElement="Flow_1rie16h">
+        <di:waypoint x="510" y="390" />
+        <di:waypoint x="805" y="390" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_159tlyd_di" bpmnElement="Flow_159tlyd">
+        <di:waypoint x="855" y="390" />
+        <di:waypoint x="950" y="390" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="894" y="372" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_01pbz6s_di" bpmnElement="Flow_01pbz6s">
+        <di:waypoint x="830" y="415" />
+        <di:waypoint x="830" y="500" />
+        <di:waypoint x="950" y="500" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="882" y="483" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1urp3d2_di" bpmnElement="Flow_1urp3d2">
+        <di:waypoint x="1490" y="400" />
+        <di:waypoint x="1585" y="400" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1oy6e8u_di" bpmnElement="Flow_1oy6e8u">
+        <di:waypoint x="1610" y="425" />
+        <di:waypoint x="1610" y="480" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1618" y="443" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1rxws1j_di" bpmnElement="Flow_1rxws1j">
+        <di:waypoint x="1635" y="400" />
+        <di:waypoint x="1750" y="400" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Gateway_0sqs3j7_di" bpmnElement="Gateway_0sqs3j7" isMarkerVisible="true">
+        <dc:Bounds x="805" y="365" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0qh2a6b_di" bpmnElement="Activity_0qh2a6b">
+        <dc:Bounds x="950" y="350" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_005fqxd_di" bpmnElement="Activity_005fqxd">
+        <dc:Bounds x="950" y="460" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0x47yx9_di" bpmnElement="Activity_0x47yx9">
+        <dc:Bounds x="1390" y="360" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_1apm7h8_di" bpmnElement="Gateway_1apm7h8" isMarkerVisible="true">
+        <dc:Bounds x="1585" y="375" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1v2mt3m_di" bpmnElement="Activity_1v2mt3m">
+        <dc:Bounds x="1560" y="480" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0a4kzh7_di" bpmnElement="Activity_0a4kzh7">
+        <dc:Bounds x="1750" y="360" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1f06uud_di" bpmnElement="Activity_1f06uud">
+        <dc:Bounds x="1970" y="360" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0iljjpd_di" bpmnElement="Activity_0iljjpd">
+        <dc:Bounds x="230" y="350" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_05ck4dv_di" bpmnElement="Activity_05ck4dv">
+        <dc:Bounds x="410" y="350" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_11sfrgz_di" bpmnElement="Participant_11sfrgz" isHorizontal="true">
+        <dc:Bounds x="160" y="640" width="860" height="250" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0qbi1wr_di" bpmnElement="Activity_0qbi1wr">
+        <dc:Bounds x="230" y="730" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_14xojfa_di" bpmnElement="Activity_14xojfa">
+        <dc:Bounds x="550" y="710" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_1x7nd70_di" bpmnElement="Participant_1x7nd70" isHorizontal="true">
+        <dc:Bounds x="160" y="930" width="1950" height="300" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_0nuuhk7_di" bpmnElement="Flow_0nuuhk7">
+        <di:waypoint x="1180" y="1040" />
+        <di:waypoint x="1265" y="1040" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_197gie6_di" bpmnElement="Flow_197gie6">
+        <di:waypoint x="1290" y="1065" />
+        <di:waypoint x="1290" y="1150" />
+        <di:waypoint x="1400" y="1150" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1332" y="1133" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0ruufha_di" bpmnElement="Flow_0ruufha">
+        <di:waypoint x="1315" y="1040" />
+        <di:waypoint x="1400" y="1040" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_19m4xhk_di" bpmnElement="Flow_19m4xhk">
+        <di:waypoint x="810" y="1010" />
+        <di:waypoint x="905" y="1010" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0b4g73l_di" bpmnElement="Flow_0b4g73l">
+        <di:waypoint x="930" y="1035" />
+        <di:waypoint x="930" y="1110" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="938" y="1063" width="15" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1duwugb_di" bpmnElement="Flow_1duwugb">
+        <di:waypoint x="930" y="985" />
+        <di:waypoint x="930" y="960" />
+        <di:waypoint x="1420" y="960" />
+        <di:waypoint x="1420" y="1000" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="961" y="942" width="18" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Activity_0feawyi_di" bpmnElement="Activity_0feawyi">
+        <dc:Bounds x="1080" y="1000" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_0nyndyn_di" bpmnElement="Gateway_0nyndyn" isMarkerVisible="true">
+        <dc:Bounds x="1265" y="1015" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1v0d9zm_di" bpmnElement="Activity_1v0d9zm">
+        <dc:Bounds x="1400" y="1110" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_12tzfd7_di" bpmnElement="Activity_12tzfd7">
+        <dc:Bounds x="1750" y="1000" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1hdmlbq_di" bpmnElement="Activity_1hdmlbq">
+        <dc:Bounds x="1400" y="1000" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_1r2yhx0_di" bpmnElement="Activity_1r2yhx0">
+        <dc:Bounds x="340" y="1050" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_09ae5r2_di" bpmnElement="Activity_09ae5r2">
+        <dc:Bounds x="710" y="970" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Gateway_1o0lihs_di" bpmnElement="Gateway_1o0lihs" isMarkerVisible="true">
+        <dc:Bounds x="905" y="985" width="50" height="50" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0n6hvhw_di" bpmnElement="Activity_0n6hvhw">
+        <dc:Bounds x="880" y="1110" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Participant_06nkquo_di" bpmnElement="Participant_06nkquo" isHorizontal="true">
+        <dc:Bounds x="160" y="80" width="1970" height="150" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_0fiiuon_di" bpmnElement="Activity_0fiiuon">
+        <dc:Bounds x="1750" y="120" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_01iahon_di" bpmnElement="Activity_01iahon">
+        <dc:Bounds x="1970" y="120" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="Activity_13xp2vr_di" bpmnElement="Activity_13xp2vr">
+        <dc:Bounds x="230" y="120" width="100" height="80" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNEdge id="Flow_14smr2g_di" bpmnElement="Flow_14smr2g">
+        <di:waypoint x="280" y="200" />
+        <di:waypoint x="280" y="350" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1pr8430_di" bpmnElement="Flow_1pr8430">
+        <di:waypoint x="280" y="430" />
+        <di:waypoint x="280" y="730" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="285" y="661" width="80" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0je874m_di" bpmnElement="Flow_0je874m">
+        <di:waypoint x="330" y="770" />
+        <di:waypoint x="460" y="770" />
+        <di:waypoint x="460" y="430" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="379" y="736" width="56" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0z85582_di" bpmnElement="Flow_0z85582">
+        <di:waypoint x="1050" y="390" />
+        <di:waypoint x="1130" y="390" />
+        <di:waypoint x="1130" y="1000" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1040" y="726" width="81" height="40" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_02hwoew_di" bpmnElement="Flow_02hwoew">
+        <di:waypoint x="1450" y="1000" />
+        <di:waypoint x="1450" y="440" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0jg4g6h_di" bpmnElement="Flow_0jg4g6h">
+        <di:waypoint x="1800" y="440" />
+        <di:waypoint x="1800" y="1000" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1820" y="717" width="60" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1ejujjc_di" bpmnElement="Flow_1ejujjc">
+        <di:waypoint x="1800" y="360" />
+        <di:waypoint x="1800" y="200" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="1815" y="256" width="69" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_0fihv5s_di" bpmnElement="Flow_0fihv5s">
+        <di:waypoint x="1850" y="1040" />
+        <di:waypoint x="2020" y="1040" />
+        <di:waypoint x="2020" y="440" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="2036" y="724" width="88" height="14" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1gknjes_di" bpmnElement="Flow_1gknjes">
+        <di:waypoint x="2020" y="360" />
+        <di:waypoint x="2020" y="200" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="2029" y="262" width="82" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1qv7s55_di" bpmnElement="Flow_1qv7s55">
+        <di:waypoint x="440" y="1090" />
+        <di:waypoint x="600" y="1090" />
+        <di:waypoint x="600" y="790" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="486" y="1030" width="68" height="40" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNEdge id="Flow_1l0z3bv_di" bpmnElement="Flow_1l0z3bv">
+        <di:waypoint x="650" y="750" />
+        <di:waypoint x="760" y="750" />
+        <di:waypoint x="760" y="970" />
+        <bpmndi:BPMNLabel>
+          <dc:Bounds x="777" y="800" width="87" height="27" />
+        </bpmndi:BPMNLabel>
+      </bpmndi:BPMNEdge>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn:definitions>
--- a/doc/workflow.png
+++ b/doc/workflow.png
--- a/executor-base/pom.xml
+++ b/executor-base/pom.xml
@ -9,9 +9,9 @@
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>ch.unisg</groupId>
-	<artifactId>executorBase</artifactId>
+	<artifactId>executor-base</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
-	<name>executorBase</name>
+	<name>executor-base</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
 		<java.version>11</java.version>
@ -60,6 +60,12 @@
 			<artifactId>json</artifactId>
 			<version>20210307</version>
 		</dependency>
+
+        <dependency>
+			<groupId>ch.unisg</groupId>
+			<artifactId>common</artifactId>
+			<version>0.0.1-SNAPSHOT</version>
+		</dependency>
 	</dependencies>

 </project>
--- a/executor-base/src/main/java/ch/unisg/executorBase/Executor1Application.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/Executor1Application.java
@ -1,13 +0,0 @@
-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);
-	}
-
-}
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/in/web/TaskAvailableController.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/in/web/TaskAvailableController.java
@ -1,4 +1,6 @@
-package ch.unisg.executorBase.executor.adapter.in.web;
+package ch.unisg.executorbase.executor.adapter.in.web;
+
+import java.util.logging.Logger;

 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
@ -7,9 +9,9 @@ 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;
+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 {
@ -19,9 +21,17 @@ public class TaskAvailableController {
        this.taskAvailableUseCase = taskAvailableUseCase;
    }

-    @GetMapping(path = "/newtask/{taskType}")
+    Logger logger = Logger.getLogger(TaskAvailableController.class.getName());
+
+    /**
+    *   Controller for notification about new events.
+    *   @return 200 OK
+    **/
+    @GetMapping(path = "/newtask/{taskType}", consumes = { "application/json" })
    public ResponseEntity<String> retrieveTaskFromTaskList(@PathVariable("taskType") String taskType) {

+        logger.info("New " + taskType + " available");
+
        if (ExecutorType.contains(taskType.toUpperCase())) {
            TaskAvailableCommand command = new TaskAvailableCommand(
                ExecutorType.valueOf(taskType.toUpperCase()));
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/ExecutionFinishedEventAdapter.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/ExecutionFinishedEventAdapter.java
@ -1,4 +1,4 @@
-package ch.unisg.executorBase.executor.adapter.out.web;
+package ch.unisg.executorbase.executor.adapter.out.web;

 import java.io.IOException;
 import java.net.URI;
@ -9,22 +9,29 @@ import java.util.logging.Level;
 import java.util.logging.Logger;

 import org.json.JSONObject;
+import org.springframework.beans.factory.annotation.Value;

-import ch.unisg.executorBase.executor.application.port.out.ExecutionFinishedEventPort;
-import ch.unisg.executorBase.executor.domain.ExecutionFinishedEvent;
+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";
+    // TODO url doesn't get mapped bc no autowiring
+    @Value("${roster.url}")
+    String server = "http://localhost:8082";

    Logger logger = Logger.getLogger(ExecutionFinishedEventAdapter.class.getName());

+    /**
+    *   Publishes the execution finished event
+    *   @return void
+    **/
    @Override
    public void publishExecutionFinishedEvent(ExecutionFinishedEvent event) {

        String body = new JSONObject()
        .put("taskID", event.getTaskID())
-        .put("result", event.getResult())
+        .put("outputData", event.getOutputData())
        .put("status", event.getStatus())
        .toString();

@ -35,15 +42,17 @@ public class ExecutionFinishedEventAdapter implements ExecutionFinishedEventPort
                .POST(HttpRequest.BodyPublishers.ofString(body))
                .build();

+
        try {
            client.send(request, HttpResponse.BodyHandlers.ofString());
-        } catch (IOException | InterruptedException e) {
+        } catch (InterruptedException e) {
            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
-            // Restore interrupted state...
            Thread.currentThread().interrupt();
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
        }

-        System.out.println("Finish execution event sent with result:" + event.getResult());
+        logger.log(Level.INFO, "Finish execution event sent with result: {0}", event.getOutputData());

    }

--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/GetAssignmentAdapter.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/GetAssignmentAdapter.java
@ -1,4 +1,4 @@
-package ch.unisg.executorBase.executor.adapter.out.web;
+package ch.unisg.executorbase.executor.adapter.out.web;

 import java.io.IOException;
 import java.net.URI;
@ -8,12 +8,14 @@ import java.net.http.HttpResponse;
 import java.util.logging.Level;
 import java.util.logging.Logger;

+import org.springframework.beans.factory.annotation.Value;
 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 ch.unisg.common.valueobject.ExecutorURI;
+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;

@ -21,17 +23,23 @@ import org.json.JSONObject;
@Primary
 public class GetAssignmentAdapter implements GetAssignmentPort {

+    // TODO Not working for now bc it doesn't get autowired
+    @Value("${roster.url}")
    String server = "http://127.0.0.1:8082";

    Logger logger = Logger.getLogger(GetAssignmentAdapter.class.getName());

+    /**
+    *   Requests a new task assignment
+    *   @return the assigned task
+    *   @see Task
+    **/
    @Override
-    public Task getAssignment(ExecutorType executorType, String ip, int port) {
+    public Task getAssignment(ExecutorType executorType, ExecutorURI executorURI) {

        String body = new JSONObject()
                  .put("executorType", executorType)
-                  .put("ip", ip)
-                  .put("port", port)
+                  .put("executorURI", executorURI.getValue())
                  .toString();

        HttpClient client = HttpClient.newHttpClient();
@ -42,17 +50,22 @@ public class GetAssignmentAdapter implements GetAssignmentPort {
                .build();

        try {
+            logger.info("Sending getAssignment Request");
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+            logger.log(Level.INFO, "getAssignment request result:\n {0}", response.body());
            if (response.body().equals("")) {
                return null;
            }
+            JSONObject responseBody = new JSONObject(response.body());

-            return new Task(new JSONObject(response.body()).getString("taskID"));
+            String inputData = responseBody.getString("inputData");
+            return new Task(responseBody.getString("taskID"), inputData);

-        } catch (IOException | InterruptedException e) {
+        } catch (InterruptedException e) {
            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
-            // Restore interrupted state...
            Thread.currentThread().interrupt();
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
        }

        return null;
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/NotifyExecutorPoolAdapter.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/adapter/out/web/NotifyExecutorPoolAdapter.java
@ -1,4 +1,4 @@
-package ch.unisg.executorBase.executor.adapter.out.web;
+package ch.unisg.executorbase.executor.adapter.out.web;

 import java.io.IOException;
 import java.net.URI;
@ -9,28 +9,35 @@ import java.util.logging.Level;
 import java.util.logging.Logger;

 import org.json.JSONObject;
+import org.springframework.beans.factory.annotation.Value;
 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;
+import ch.unisg.common.valueobject.ExecutorURI;
+import ch.unisg.executorbase.executor.application.port.out.NotifyExecutorPoolPort;
+import ch.unisg.executorbase.executor.domain.ExecutorType;

@Component
@Primary
 public class NotifyExecutorPoolAdapter implements NotifyExecutorPoolPort {

+    // TODO Not working for now bc it doesn't get autowired
+    @Value("${executor.pool.url}")
    String server = "http://127.0.0.1:8083";

    Logger logger = Logger.getLogger(NotifyExecutorPoolAdapter.class.getName());

+    /**
+    *   Notifies the executor-pool about the startup of this executor
+    *   @return if the notification was successful
+    **/
    @Override
-    public boolean notifyExecutorPool(String ip, int port, ExecutorType executorType) {
+    public boolean notifyExecutorPool(ExecutorURI executorURI, ExecutorType executorType) {

        String body = new JSONObject()
            .put("executorTaskType", executorType)
-            .put("executorIp", ip)
-            .put("executorPort", Integer.toString(port))
+            .put("executorUri", executorURI.getValue())
            .toString();

        HttpClient client = HttpClient.newHttpClient();
@ -45,10 +52,11 @@ public class NotifyExecutorPoolAdapter implements NotifyExecutorPoolPort {
            if (response.statusCode() == HttpStatus.CREATED.value()) {
                return true;
            }
-        } catch (IOException | InterruptedException e) {
+        } catch (InterruptedException e) {
            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
-            // Restore interrupted state...
            Thread.currentThread().interrupt();
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
        }

         return false;
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/in/TaskAvailableCommand.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/in/TaskAvailableCommand.java
@ -1,10 +1,9 @@
-package ch.unisg.executorBase.executor.application.port.in;
-
-import ch.unisg.executorBase.common.SelfValidating;
-import ch.unisg.executorBase.executor.domain.ExecutorType;
+package ch.unisg.executorbase.executor.application.port.in;

 import javax.validation.constraints.NotNull;

+import ch.unisg.common.validation.SelfValidating;
+import ch.unisg.executorbase.executor.domain.ExecutorType;
 import lombok.Value;

@Value
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/in/TaskAvailableUseCase.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/in/TaskAvailableUseCase.java
@ -1,4 +1,4 @@
-package ch.unisg.executorBase.executor.application.port.in;
+package ch.unisg.executorbase.executor.application.port.in;

 public interface TaskAvailableUseCase {
    void newTaskAvailable(TaskAvailableCommand command);
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/ExecutionFinishedEventPort.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/ExecutionFinishedEventPort.java
@ -1,6 +1,6 @@
-package ch.unisg.executorBase.executor.application.port.out;
+package ch.unisg.executorbase.executor.application.port.out;

-import ch.unisg.executorBase.executor.domain.ExecutionFinishedEvent;
+import ch.unisg.executorbase.executor.domain.ExecutionFinishedEvent;

 public interface ExecutionFinishedEventPort {
    void publishExecutionFinishedEvent(ExecutionFinishedEvent event);
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/GetAssignmentPort.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/GetAssignmentPort.java
@ -1,8 +1,9 @@
-package ch.unisg.executorBase.executor.application.port.out;
+package ch.unisg.executorbase.executor.application.port.out;

-import ch.unisg.executorBase.executor.domain.ExecutorType;
-import ch.unisg.executorBase.executor.domain.Task;
+import ch.unisg.common.valueobject.ExecutorURI;
+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);
+    Task getAssignment(ExecutorType executorType, ExecutorURI executorURI);
 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/NotifyExecutorPoolPort.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/port/out/NotifyExecutorPoolPort.java
@ -1,7 +1,8 @@
-package ch.unisg.executorBase.executor.application.port.out;
+package ch.unisg.executorbase.executor.application.port.out;

-import ch.unisg.executorBase.executor.domain.ExecutorType;
+import ch.unisg.common.valueobject.ExecutorURI;
+import ch.unisg.executorbase.executor.domain.ExecutorType;

 public interface NotifyExecutorPoolPort {
-    boolean notifyExecutorPool(String ip, int port, ExecutorType executorType);
+    boolean notifyExecutorPool(ExecutorURI executorURI, ExecutorType executorType);
 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/service/NotifyExecutorPoolService.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/service/NotifyExecutorPoolService.java
@ -1,7 +1,8 @@
-package ch.unisg.executorBase.executor.application.service;
+package ch.unisg.executorbase.executor.application.service;

-import ch.unisg.executorBase.executor.application.port.out.NotifyExecutorPoolPort;
-import ch.unisg.executorBase.executor.domain.ExecutorType;
+import ch.unisg.common.valueobject.ExecutorURI;
+import ch.unisg.executorbase.executor.application.port.out.NotifyExecutorPoolPort;
+import ch.unisg.executorbase.executor.domain.ExecutorType;
 import lombok.RequiredArgsConstructor;

@RequiredArgsConstructor
@ -9,7 +10,7 @@ public class NotifyExecutorPoolService {

 	private final NotifyExecutorPoolPort notifyExecutorPoolPort;

-	public boolean notifyExecutorPool(String ip, int port, ExecutorType executorType) {
-		return notifyExecutorPoolPort.notifyExecutorPool(ip, port, executorType);
+	public boolean notifyExecutorPool(ExecutorURI executorURI, ExecutorType executorType) {
+		return notifyExecutorPoolPort.notifyExecutorPool(executorURI, executorType);
 	}
 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/application/service/TaskAvailableService.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/application/service/TaskAvailableService.java
@ -1,9 +1,9 @@
-package ch.unisg.executorBase.executor.application.service;
+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 ch.unisg.executorbase.executor.application.port.in.TaskAvailableCommand;
+import ch.unisg.executorbase.executor.application.port.in.TaskAvailableUseCase;
 import lombok.RequiredArgsConstructor;

 import javax.transaction.Transactional;
@ -15,6 +15,6 @@ public class TaskAvailableService implements TaskAvailableUseCase {

    @Override
    public void newTaskAvailable(TaskAvailableCommand command) {
-      // Placeholder so spring can create a bean
+      // Placeholder so spring can create a bean, implementation of this function is inside the executors
    }
 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutionFinishedEvent.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutionFinishedEvent.java
@ -1,21 +1,21 @@
-package ch.unisg.executorBase.executor.domain;
+package ch.unisg.executorbase.executor.domain;

 import lombok.Getter;

 public class ExecutionFinishedEvent {
-    
+
    @Getter
    private String taskID;
-    
+
    @Getter
-    private String result;
+    private String outputData;

    @Getter
    private String status;

-    public ExecutionFinishedEvent(String taskID, String result, String status) {
+    public ExecutionFinishedEvent(String taskID, String outputData, String status) {
        this.taskID = taskID;
-        this.result = result;
+        this.outputData = outputData;
        this.status = status;
    }
 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorBase.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorBase.java
@ -1,45 +1,46 @@
-package ch.unisg.executorBase.executor.domain;
+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 java.util.logging.Logger;

-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 ch.unisg.common.valueobject.ExecutorURI;
+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.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.application.service.NotifyExecutorPoolService;
 import lombok.Getter;

 public abstract class ExecutorBase {

    @Getter
-    private String ip;
+    private ExecutorURI executorURI;

    @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
+    // TODO Violation of the Dependency Inversion Principle?,
+    // TODO do this with only services
    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;
+    Logger logger = Logger.getLogger(ExecutorBase.class.getName());

+    protected ExecutorBase(ExecutorType executorType) {
+        logger.info("Starting Executor");
        this.status = ExecutorStatus.STARTING_UP;
-        if(!notifyExecutorPoolService.notifyExecutorPool(this.ip, this.port, this.executorType)) {
+        this.executorType = executorType;
+        // TODO set this automaticly
+        this.executorURI = new ExecutorURI("http://localhost:8084");
+        // TODO do this in main
+        // Notify executor-pool about existence. If executor-pools response is successfull start with getting an assignment, else shut down executor.
+        if(!notifyExecutorPoolService.notifyExecutorPool(this.executorURI, this.executorType)) {
            System.exit(0);
        } else {
            this.status = ExecutorStatus.IDLING;
@ -47,9 +48,14 @@ public abstract class ExecutorBase {
        }
    }

+    /**
+    *   Requests a new task from the task queue
+    *   @return void
+    **/
    public void getAssignment() {
-        Task newTask = getAssignmentPort.getAssignment(this.getExecutorType(), this.getIp(),
-            this.getPort());
+        Task newTask = getAssignmentPort.getAssignment(this.getExecutorType(), this.getExecutorURI());
+        System.out.println("New assignment");
+        System.out.println(newTask);
        if (newTask != null) {
            this.executeTask(newTask);
        } else {
@ -57,19 +63,28 @@ public abstract class ExecutorBase {
        }
    }

+    /**
+    *   Start the execution of a task
+    *   @return void
+    **/
    private void executeTask(Task task) {
-        System.out.println("Starting execution");
+        logger.info("Starting execution");
        this.status = ExecutorStatus.EXECUTING;

-        task.setResult(execution());
+        task.setOutputData(execution(task.getInputData()));

+        // TODO implement logic if execution was not successful
        executionFinishedEventPort.publishExecutionFinishedEvent(
-            new ExecutionFinishedEvent(task.getTaskID(), task.getResult(), "SUCCESS"));
+            new ExecutionFinishedEvent(task.getTaskID(), task.getOutputData(), "SUCCESS"));

-        System.out.println("Finish execution");
+        logger.info("Finish execution");
        getAssignment();
    }

-    protected abstract String execution();
+    /**
+    *   Implementation of the actual execution method of an executor
+    *   @return the execution result
+    **/
+    protected abstract String execution(String input);

 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorStatus.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorStatus.java
@ -1,7 +1,7 @@
-package ch.unisg.executorBase.executor.domain;
+package ch.unisg.executorbase.executor.domain;

 public enum ExecutorStatus {
-    STARTING_UP,
-    EXECUTING,
-    IDLING,
+    STARTING_UP, // Executor is starting
+    EXECUTING, // Executor is currently executing a task
+    IDLING, // Executor has no tasks left and is waiting for new instructions
 }
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorType.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/ExecutorType.java
@ -1,8 +1,12 @@
-package ch.unisg.executorBase.executor.domain;
+package ch.unisg.executorbase.executor.domain;

 public enum ExecutorType {
    ADDITION, ROBOT;

+    /**
+    *   Checks if the give executor type exists.
+    *   @return Wheter the given executor type exists
+    **/
    public static boolean contains(String test) {

        for (ExecutorType x : ExecutorType.values()) {
--- a/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/Task.java
+++ b/executor-base/src/main/java/ch/unisg/executorBase/executor/domain/Task.java
@ -1,4 +1,4 @@
-package ch.unisg.executorBase.executor.domain;
+package ch.unisg.executorbase.executor.domain;

 import lombok.Getter;
 import lombok.Setter;
@ -10,10 +10,16 @@ public class Task {

    @Getter
    @Setter
-    private String result;
+    private String outputData;

-    public Task(String taskID) {
+    // TODO maybe create a value object for inputData so we can make sure it is in the right
+    // format.
+    @Getter
+    private String inputData;
+
+    public Task(String taskID, String inputData) {
        this.taskID = taskID;
+        this.inputData= inputData;
    }

 }
--- a/executor-base/src/main/resources/application.properties
+++ b/executor-base/src/main/resources/application.properties
@ -1 +1,6 @@
 server.port=8081
+roster.url=http://127.0.0.1:8082
+executor.pool.url=http://127.0.0.1:8083
+executor1.url=http://127.0.0.1:8084
+executor2.url=http://127.0.0.1:8085
+task-list.url=http://127.0.0.1:8081
--- a/executor-computation/.gitignore
+++ b/executor-computation/.gitignore
--- a/executor-computation/.mvn/wrapper/MavenWrapperDownloader.java
+++ b/executor-computation/.mvn/wrapper/MavenWrapperDownloader.java
--- a/executor-computation/.mvn/wrapper/maven-wrapper.jar
+++ b/executor-computation/.mvn/wrapper/maven-wrapper.jar
--- a/executor-computation/.mvn/wrapper/maven-wrapper.properties
+++ b/executor-computation/.mvn/wrapper/maven-wrapper.properties
--- a/executor-computation/Dockerfile
+++ b/executor-computation/Dockerfile
--- a/executor-computation/mvnw
+++ b/executor-computation/mvnw
--- a/executor-computation/mvnw.cmd
+++ b/executor-computation/mvnw.cmd
--- a/executor-computation/pom.xml
+++ b/executor-computation/pom.xml
@ -9,9 +9,9 @@
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>ch.unisg</groupId>
-	<artifactId>executor2</artifactId>
+	<artifactId>executor-computation</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
-	<name>executor2</name>
+	<name>executor-computation</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
 		<java.version>11</java.version>
@ -42,7 +42,7 @@
 		</dependency>
 		<dependency>
 			<groupId>ch.unisg</groupId>
-			<artifactId>executorBase</artifactId>
+			<artifactId>executor-base</artifactId>
 			<version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
 		</dependency>
--- a/executor-computation/src/main/java/ch/unisg/executorcomputation/ExecutorcomputationApplication.java
+++ b/executor-computation/src/main/java/ch/unisg/executorcomputation/ExecutorcomputationApplication.java
@ -1,15 +1,15 @@
-package ch.unisg.executor2;
+package ch.unisg.executorcomputation;

 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

-import ch.unisg.executor2.executor.domain.Executor;
+import ch.unisg.executorcomputation.executor.domain.Executor;

@SpringBootApplication
-public class Executor2Application {
+public class ExecutorcomputationApplication {

 	public static void main(String[] args) {
-		SpringApplication.run(Executor2Application.class, args);
+		SpringApplication.run(ExecutorcomputationApplication.class, args);
 		Executor.getExecutor();
 	}

--- a/executor-computation/src/main/java/ch/unisg/executorcomputation/executor/adapter/in/web/TaskAvailableController.java
+++ b/executor-computation/src/main/java/ch/unisg/executorcomputation/executor/adapter/in/web/TaskAvailableController.java
@ -1,4 +1,4 @@
-package ch.unisg.executor2.executor.adapter.in.web;
+package ch.unisg.executorcomputation.executor.adapter.in.web;

 import java.util.concurrent.CompletableFuture;

@ -9,9 +9,9 @@ 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;
+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 {
--- a/executor-computation/src/main/java/ch/unisg/executorcomputation/executor/application/service/TaskAvailableService.java
+++ b/executor-computation/src/main/java/ch/unisg/executorcomputation/executor/application/service/TaskAvailableService.java
@ -1,11 +1,11 @@
-package ch.unisg.executor1.executor.application.service;
+package ch.unisg.executorcomputation.executor.application.service;

 import org.springframework.stereotype.Component;

-import ch.unisg.executor1.executor.domain.Executor;
-import ch.unisg.executorBase.executor.application.port.in.TaskAvailableCommand;
-import ch.unisg.executorBase.executor.application.port.in.TaskAvailableUseCase;
-import ch.unisg.executorBase.executor.domain.ExecutorStatus;
+import ch.unisg.executorcomputation.executor.domain.Executor;
+import ch.unisg.executorbase.executor.application.port.in.TaskAvailableCommand;
+import ch.unisg.executorbase.executor.application.port.in.TaskAvailableUseCase;
+import ch.unisg.executorbase.executor.domain.ExecutorStatus;
 import lombok.RequiredArgsConstructor;

 import javax.transaction.Transactional;
@ -20,7 +20,7 @@ public class TaskAvailableService implements TaskAvailableUseCase {

        Executor executor = Executor.getExecutor();

-        if (executor.getExecutorType() == command.getTaskType() && 
+        if (executor.getExecutorType() == command.getTaskType() &&
            executor.getStatus() == ExecutorStatus.IDLING) {
            executor.getAssignment();
        }
--- a/executor-computation/src/main/java/ch/unisg/executorcomputation/executor/domain/Executor.java
+++ b/executor-computation/src/main/java/ch/unisg/executorcomputation/executor/domain/Executor.java
@ -0,0 +1,65 @@
+package ch.unisg.executorcomputation.executor.domain;
+
+import java.util.concurrent.TimeUnit;
+
+import ch.unisg.executorbase.executor.domain.ExecutorBase;
+import ch.unisg.executorbase.executor.domain.ExecutorType;
+
+public class Executor extends ExecutorBase {
+
+    private static final Executor executor = new Executor(ExecutorType.ADDITION);
+
+    public static Executor getExecutor() {
+        return executor;
+    }
+
+    private Executor(ExecutorType executorType) {
+        super(executorType);
+    }
+
+    @Override
+    protected
+    String execution(String inputData) {
+
+        System.out.println(inputData);
+
+        String operator = "";
+        if (inputData.contains("+")) {
+            operator = "+";
+        } else if (inputData.contains("-")) {
+            operator = "-";
+        } else if (inputData.contains("*")) {
+            operator = "*";
+        }
+
+        // System.out.println(operator);
+
+        // double result = Double.NaN;
+
+        // System.out.print(inputData.split("+"));
+
+        // int a = Integer.parseInt(inputData.split(operator)[0]);
+        // int b = Integer.parseInt(inputData.split(operator)[1]);
+
+        // // try {
+        // //     TimeUnit.SECONDS.sleep(20);
+        // // } catch (InterruptedException e) {
+        // //     e.printStackTrace();
+        // // }
+
+        // if (operator.equalsIgnoreCase("+")) {
+        //     result = a + b;
+        // } else if (operator.equalsIgnoreCase("*")) {
+        //     result = a * b;
+        // } else if (operator.equalsIgnoreCase("-")) {
+        //     result = a - b;
+        // }
+
+        // System.out.println("Result: " + result);
+
+        double result = 0.0;
+
+        return Double.toString(result);
+    }
+
+}
--- a/executor-computation/src/main/resources/application.properties
+++ b/executor-computation/src/main/resources/application.properties
--- a/executor-computation/src/test/java/ch/unisg/executorcomputation/ExecutorcomputationApplicationTests.java
+++ b/executor-computation/src/test/java/ch/unisg/executorcomputation/ExecutorcomputationApplicationTests.java
@ -1,10 +1,10 @@
-package ch.unisg.executor2;
+package ch.unisg.executorcomputation;

 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
-class Executor2ApplicationTests {
+class ExecutorcomputationApplicationTests {

 	@Test
 	void contextLoads() {
--- a/executor-pool/pom.xml
+++ b/executor-pool/pom.xml
@ -63,6 +63,12 @@
            <artifactId>javax.transaction-api</artifactId>
            <scope>compile</scope>
        </dependency>
+        <dependency>
+            <groupId>org.eclipse.paho</groupId>
+            <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
+            <version>1.2.5</version>
+            <scope>compile</scope>
+        </dependency>
    </dependencies>

 	<build>
--- a/executor-pool/src/main/java/ch/unisg/common/ConfigProperties.java
+++ b/executor-pool/src/main/java/ch/unisg/common/ConfigProperties.java
@ -0,0 +1,22 @@
+package ch.unisg.common;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+import java.net.URI;
+
+@Component
+public class ConfigProperties {
+    @Autowired
+    private Environment environment;
+
+    /**
+     * Retrieves the URI of the MQTT broker.
+     *
+     * @return the URI of the MQTT broker
+     */
+    public URI getMqttBrokerUri() {
+        return URI.create(environment.getProperty("mqtt.broker.uri"));
+    }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/TestController.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/TestController.java
@ -1,12 +0,0 @@
-package ch.unisg.executorpool;
-
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-public class TestController {
-    @RequestMapping("/")
-    public String index() {
-        return "Hello World! Executor Pool";
-    }
-}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/common/clients/TapasMqttClient.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/common/clients/TapasMqttClient.java
@ -0,0 +1,41 @@
+package ch.unisg.executorpool.adapter.common.clients;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.eclipse.paho.client.mqttv3.*;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
+
+import java.nio.charset.StandardCharsets;
+import java.util.UUID;
+
+public class TapasMqttClient {
+    private static final Logger LOGGER = LogManager.getLogger(TapasMqttClient.class);
+
+    private static TapasMqttClient tapasClient = null;
+
+    private MqttClient mqttClient;
+    private final String mqttClientId;
+    private final String brokerAddress;
+
+    private TapasMqttClient(String brokerAddress) {
+        this.mqttClientId = UUID.randomUUID().toString();
+        this.brokerAddress = brokerAddress;
+    }
+
+    public static synchronized TapasMqttClient getInstance(String brokerAddress) {
+
+        if (tapasClient == null) {
+            tapasClient = new TapasMqttClient(brokerAddress);
+        }
+
+        return tapasClient;
+    }
+
+    public void publishMessage(String topic, String payload) throws MqttException {
+        mqttClient = new org.eclipse.paho.client.mqttv3.MqttClient(brokerAddress, mqttClientId, new MemoryPersistence());
+        mqttClient.connect();
+        MqttMessage message = new MqttMessage(payload.getBytes(StandardCharsets.UTF_8));
+        mqttClient.publish(topic, message);
+        mqttClient.disconnect();
+    }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/common/formats/ExecutorJsonRepresentation.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/common/formats/ExecutorJsonRepresentation.java
@ -0,0 +1,51 @@
+package ch.unisg.executorpool.adapter.common.formats;
+
+import ch.unisg.executorpool.domain.ExecutorClass;
+import lombok.Getter;
+import lombok.Setter;
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.util.List;
+
+public class ExecutorJsonRepresentation {
+    public static final String EXECUTOR_MEDIA_TYPE = "application/json";
+
+    @Getter @Setter
+    private String executorUri;
+
+    @Getter @Setter
+    private String executorTaskType;
+
+    // TODO Check if this need Setters. Also applies to AuctionJsonRepresentation
+    public ExecutorJsonRepresentation(String executorUri, String executorTaskType){
+        this.executorUri = executorUri;
+        this.executorTaskType = executorTaskType;
+    }
+
+    public static String serialize(ExecutorClass executorClass) {
+        JSONObject payload = new JSONObject();
+
+        payload.put("executorUri", executorClass.getExecutorUri().getValue());
+        payload.put("executorTaskType", executorClass.getExecutorTaskType().getValue());
+
+        return payload.toString();
+    }
+
+    public static String serialize(List<ExecutorClass> listOfExecutors) {
+        JSONArray jsonArray = new JSONArray();
+
+        for (ExecutorClass executor: listOfExecutors) {
+            JSONObject jsonObject = new JSONObject();
+
+            jsonObject.put("executorUri", executor.getExecutorUri().getValue());
+            jsonObject.put("executorTaskType", executor.getExecutorTaskType().getValue());
+
+            jsonArray.put(jsonObject);
+        }
+
+        return jsonArray.toString();
+    }
+
+    private ExecutorJsonRepresentation() { }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/AddNewExecutorToExecutorPoolWebController.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/AddNewExecutorToExecutorPoolWebController.java
@ -1,5 +1,7 @@
 package ch.unisg.executorpool.adapter.in.web;

+import ch.unisg.executorpool.adapter.common.clients.TapasMqttClient;
+import ch.unisg.executorpool.adapter.common.formats.ExecutorJsonRepresentation;
 import ch.unisg.executorpool.application.port.in.AddNewExecutorToExecutorPoolUseCase;
 import ch.unisg.executorpool.application.port.in.AddNewExecutorToExecutorPoolCommand;
 import ch.unisg.executorpool.domain.ExecutorClass;
@ -11,6 +13,11 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.server.ResponseStatusException;
 import javax.validation.ConstraintViolationException;
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.util.UUID;
+
+import org.eclipse.paho.client.mqttv3.*;

@RestController
 public class AddNewExecutorToExecutorPoolWebController {
@ -20,19 +27,21 @@ public class AddNewExecutorToExecutorPoolWebController {
        this.addNewExecutorToExecutorPoolUseCase = addNewExecutorToExecutorPoolUseCase;
    }

-    @PostMapping(path = "/executor-pool/AddExecutor", consumes = {ExecutorMediaType.EXECUTOR_MEDIA_TYPE})
-    public ResponseEntity<String> addNewExecutorToExecutorPool(@RequestBody ExecutorClass executorClass){
-        try{
+    @PostMapping(path = "/executor-pool/AddExecutor", consumes = {ExecutorJsonRepresentation.EXECUTOR_MEDIA_TYPE})
+    public ResponseEntity<String> addNewExecutorToExecutorPool(@RequestBody ExecutorJsonRepresentation payload){
+        try {
            AddNewExecutorToExecutorPoolCommand command = new AddNewExecutorToExecutorPoolCommand(
-                    executorClass.getExecutorIp(), executorClass.getExecutorPort(), executorClass.getExecutorTaskType()
+                new ExecutorClass.ExecutorUri(URI.create(payload.getExecutorUri())),
+                new ExecutorClass.ExecutorTaskType(payload.getExecutorTaskType())
            );

            ExecutorClass newExecutor = addNewExecutorToExecutorPoolUseCase.addNewExecutorToExecutorPool(command);

            HttpHeaders responseHeaders = new HttpHeaders();
-            responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorMediaType.EXECUTOR_MEDIA_TYPE);
+            responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorJsonRepresentation.EXECUTOR_MEDIA_TYPE);
+
+            return new ResponseEntity<>(ExecutorJsonRepresentation.serialize(newExecutor), responseHeaders, HttpStatus.CREATED);

-            return new ResponseEntity<>(ExecutorMediaType.serialize(newExecutor), responseHeaders, HttpStatus.CREATED);
        } catch (ConstraintViolationException e){
            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, e.getMessage());
        }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/ExecutorMediaType.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/ExecutorMediaType.java
@ -1,38 +0,0 @@
-package ch.unisg.executorpool.adapter.in.web;
-
-import ch.unisg.executorpool.domain.ExecutorClass;
-import org.json.JSONArray;
-import org.json.JSONObject;
-
-import java.util.List;
-
-final public class ExecutorMediaType {
-    public static final String EXECUTOR_MEDIA_TYPE = "application/json";
-
-    public static String serialize(ExecutorClass executorClass) {
-        JSONObject payload = new JSONObject();
-
-        payload.put("executorIp", executorClass.getExecutorIp().getValue());
-        payload.put("executorPort", executorClass.getExecutorPort().getValue());
-        payload.put("executorTaskType", executorClass.getExecutorTaskType().getValue());
-
-        return payload.toString();
-    }
-
-    public static String serialize(List<ExecutorClass> listOfExecutors) {
-        String serializedList = "[ \n";
-
-        for (ExecutorClass executor: listOfExecutors) {
-            serializedList += serialize(executor) + "\n";
-        }
-
-        // return serializedList + "\n ]";
-        JSONArray jsonArray = new JSONArray();
-        JSONObject jsonObject = new JSONObject();
-        jsonObject.put("executorIp", "localhost");
-        jsonArray.put(jsonObject);
-        return jsonArray.toString();
-    }
-
-    private ExecutorMediaType() { }
-}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/GetAllExecutorInExecutorPoolByTypeWebController.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/GetAllExecutorInExecutorPoolByTypeWebController.java
@ -1,35 +0,0 @@
-package ch.unisg.executorpool.adapter.in.web;
-
-import ch.unisg.executorpool.application.port.in.GetAllExecutorInExecutorPoolByTypeQuery;
-import ch.unisg.executorpool.application.port.in.GetAllExecutorInExecutorPoolByTypeUseCase;
-import ch.unisg.executorpool.domain.ExecutorClass;
-import ch.unisg.executorpool.domain.ExecutorClass.ExecutorTaskType;
-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 java.util.List;
-
-@RestController
-public class GetAllExecutorInExecutorPoolByTypeWebController {
-    private final GetAllExecutorInExecutorPoolByTypeUseCase getAllExecutorInExecutorPoolByTypeUseCase;
-
-    public GetAllExecutorInExecutorPoolByTypeWebController(GetAllExecutorInExecutorPoolByTypeUseCase getAllExecutorInExecutorPoolByTypeUseCase){
-        this.getAllExecutorInExecutorPoolByTypeUseCase = getAllExecutorInExecutorPoolByTypeUseCase;
-    }
-
-    @GetMapping(path = "/executor-pool/GetAllExecutorInExecutorPoolByType/{taskType}")
-    public ResponseEntity<String> getAllExecutorInExecutorPoolByType(@PathVariable("taskType") String taskType){
-        GetAllExecutorInExecutorPoolByTypeQuery query = new GetAllExecutorInExecutorPoolByTypeQuery(new ExecutorTaskType(taskType));
-        List<ExecutorClass> matchedExecutors = getAllExecutorInExecutorPoolByTypeUseCase.getAllExecutorInExecutorPoolByType(query);
-
-        // Add the content type as a response header
-        HttpHeaders responseHeaders = new HttpHeaders();
-        responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorMediaType.EXECUTOR_MEDIA_TYPE);
-
-        return new ResponseEntity<>(ExecutorMediaType.serialize(matchedExecutors), responseHeaders, HttpStatus.OK);
-    }
-}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/GetAllExecutorsInExecutorPoolByTypeWebController.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/GetAllExecutorsInExecutorPoolByTypeWebController.java
@ -0,0 +1,36 @@
+package ch.unisg.executorpool.adapter.in.web;
+
+import ch.unisg.executorpool.adapter.common.formats.ExecutorJsonRepresentation;
+import ch.unisg.executorpool.application.port.in.GetAllExecutorsInExecutorPoolByTypeQuery;
+import ch.unisg.executorpool.application.port.in.GetAllExecutorsInExecutorPoolByTypeUseCase;
+import ch.unisg.executorpool.domain.ExecutorClass;
+import ch.unisg.executorpool.domain.ExecutorClass.ExecutorTaskType;
+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 java.util.List;
+
+@RestController
+public class GetAllExecutorsInExecutorPoolByTypeWebController {
+    private final GetAllExecutorsInExecutorPoolByTypeUseCase getAllExecutorsInExecutorPoolByTypeUseCase;
+
+    public GetAllExecutorsInExecutorPoolByTypeWebController(GetAllExecutorsInExecutorPoolByTypeUseCase getAllExecutorInExecutorPoolByTypeUseCase){
+        this.getAllExecutorsInExecutorPoolByTypeUseCase = getAllExecutorInExecutorPoolByTypeUseCase;
+    }
+
+    @GetMapping(path = "/executor-pool/GetAllExecutorsInExecutorPoolByType/{taskType}")
+    public ResponseEntity<String> getAllExecutorInExecutorPoolByType(@PathVariable("taskType") String taskType){
+        GetAllExecutorsInExecutorPoolByTypeQuery query = new GetAllExecutorsInExecutorPoolByTypeQuery(new ExecutorTaskType(taskType));
+        List<ExecutorClass> matchedExecutors = getAllExecutorsInExecutorPoolByTypeUseCase.getAllExecutorsInExecutorPoolByType(query);
+
+        // Add the content type as a response header
+        HttpHeaders responseHeaders = new HttpHeaders();
+        responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorJsonRepresentation.EXECUTOR_MEDIA_TYPE);
+
+        return new ResponseEntity<>(ExecutorJsonRepresentation.serialize(matchedExecutors), responseHeaders, HttpStatus.OK);
+    }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/GetAllExecutorsInExecutorPoolWebController.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/GetAllExecutorsInExecutorPoolWebController.java
@ -1,5 +1,6 @@
 package ch.unisg.executorpool.adapter.in.web;

+import ch.unisg.executorpool.adapter.common.formats.ExecutorJsonRepresentation;
 import ch.unisg.executorpool.application.port.in.GetAllExecutorsInExecutorPoolUseCase;
 import ch.unisg.executorpool.domain.ExecutorClass;
 import org.springframework.http.HttpHeaders;
@ -24,8 +25,8 @@ public class GetAllExecutorsInExecutorPoolWebController {

        // Add the content type as a response header
        HttpHeaders responseHeaders = new HttpHeaders();
-        responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorMediaType.EXECUTOR_MEDIA_TYPE);
+        responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorJsonRepresentation.EXECUTOR_MEDIA_TYPE);

-        return new ResponseEntity<>(ExecutorMediaType.serialize(executorClassList), responseHeaders, HttpStatus.OK);
+        return new ResponseEntity<>(ExecutorJsonRepresentation.serialize(executorClassList), responseHeaders, HttpStatus.OK);
    }
 }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/RemoveExecutorFromExecutorPoolWebController.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/in/web/RemoveExecutorFromExecutorPoolWebController.java
@ -1,5 +1,6 @@
 package ch.unisg.executorpool.adapter.in.web;

+import ch.unisg.executorpool.adapter.common.formats.ExecutorJsonRepresentation;
 import ch.unisg.executorpool.application.port.in.RemoveExecutorFromExecutorPoolCommand;
 import ch.unisg.executorpool.application.port.in.RemoveExecutorFromExecutorPoolUseCase;
 import ch.unisg.executorpool.domain.ExecutorClass;
@ -11,6 +12,7 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.server.ResponseStatusException;

+import java.net.URI;
 import java.util.Optional;

@RestController
@ -21,9 +23,11 @@ public class RemoveExecutorFromExecutorPoolWebController {
        this.removeExecutorFromExecutorPoolUseCase = removeExecutorFromExecutorPoolUseCase;
    }

-    @PostMapping(path = "/executor-pool/RemoveExecutor", consumes = {ExecutorMediaType.EXECUTOR_MEDIA_TYPE})
-    public ResponseEntity<String> removeExecutorFromExecutorPool(@RequestBody ExecutorClass executorClass){
-        RemoveExecutorFromExecutorPoolCommand command = new RemoveExecutorFromExecutorPoolCommand(executorClass.getExecutorIp(), executorClass.getExecutorPort());
+    @PostMapping(path = "/executor-pool/RemoveExecutor", consumes = {ExecutorJsonRepresentation.EXECUTOR_MEDIA_TYPE})
+    public ResponseEntity<String> removeExecutorFromExecutorPool(@RequestBody ExecutorJsonRepresentation executorJsonRepresentation){
+        RemoveExecutorFromExecutorPoolCommand command = new RemoveExecutorFromExecutorPoolCommand(
+            new ExecutorClass.ExecutorUri(URI.create(executorJsonRepresentation.getExecutorUri()))
+        );
        Optional<ExecutorClass> removedExecutor = removeExecutorFromExecutorPoolUseCase.removeExecutorFromExecutorPool(command);

        if(removedExecutor.isEmpty()){
@ -31,9 +35,9 @@ public class RemoveExecutorFromExecutorPoolWebController {
        }

        HttpHeaders responseHeaders = new HttpHeaders();
-        responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorMediaType.EXECUTOR_MEDIA_TYPE);
+        responseHeaders.add(HttpHeaders.CONTENT_TYPE, ExecutorJsonRepresentation.EXECUTOR_MEDIA_TYPE);

-        return new ResponseEntity<>(ExecutorMediaType.serialize(removedExecutor.get()), responseHeaders,
+        return new ResponseEntity<>(ExecutorJsonRepresentation.serialize(removedExecutor.get()), responseHeaders,
                HttpStatus.OK);
    }
 }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/out/messaging/PublishExecutorAddedEventAdapter.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/out/messaging/PublishExecutorAddedEventAdapter.java
@ -0,0 +1,43 @@
+package ch.unisg.executorpool.adapter.out.messaging;
+
+import ch.unisg.common.ConfigProperties;
+import ch.unisg.executorpool.adapter.common.clients.TapasMqttClient;
+import ch.unisg.executorpool.adapter.common.formats.ExecutorJsonRepresentation;
+import ch.unisg.executorpool.application.port.out.ExecutorAddedEventPort;
+import ch.unisg.executorpool.domain.ExecutorAddedEvent;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.eclipse.paho.client.mqttv3.MqttException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Primary;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+import java.net.URI;
+
+@Component
+@Primary
+public class PublishExecutorAddedEventAdapter implements ExecutorAddedEventPort {
+
+    private static final Logger LOGGER = LogManager.getLogger(PublishExecutorAddedEventAdapter.class);
+
+    // TODO Can't autowire. Find fix
+    /*
+    @Autowired
+    private ConfigProperties config;
+    */
+
+    @Autowired
+    private Environment environment;
+
+    @Override
+    public void publishExecutorAddedEvent(ExecutorAddedEvent event){
+        try{
+            var mqttClient = TapasMqttClient.getInstance(environment.getProperty("mqtt.broker.uri"));
+            mqttClient.publishMessage("ch/unisg/tapas/executors/added", ExecutorJsonRepresentation.serialize(event.getExecutorClass()));
+        }
+        catch (MqttException e){
+            LOGGER.error(e.getMessage(), e);
+        }
+    }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/adapter/out/messaging/PublishExecutorRemovedEventAdapter.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/adapter/out/messaging/PublishExecutorRemovedEventAdapter.java
@ -0,0 +1,41 @@
+package ch.unisg.executorpool.adapter.out.messaging;
+
+import ch.unisg.executorpool.adapter.common.clients.TapasMqttClient;
+import ch.unisg.executorpool.adapter.common.formats.ExecutorJsonRepresentation;
+import ch.unisg.executorpool.application.port.out.ExecutorRemovedEventPort;
+import ch.unisg.executorpool.domain.ExecutorAddedEvent;
+import ch.unisg.executorpool.domain.ExecutorRemovedEvent;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.eclipse.paho.client.mqttv3.MqttException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Primary;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Primary
+public class PublishExecutorRemovedEventAdapter  implements ExecutorRemovedEventPort {
+
+    private static final Logger LOGGER = LogManager.getLogger(PublishExecutorAddedEventAdapter.class);
+
+    // TODO Can't autowire. Find fix
+    /*
+    @Autowired
+    private ConfigProperties config;
+    */
+
+    @Autowired
+    private Environment environment;
+
+    @Override
+    public void publishExecutorRemovedEvent(ExecutorRemovedEvent event){
+        try{
+            var mqttClient = TapasMqttClient.getInstance(environment.getProperty("mqtt.broker.uri"));
+            mqttClient.publishMessage("ch/unisg/tapas/executors/removed", ExecutorJsonRepresentation.serialize(event.getExecutorClass()));
+        }
+        catch (MqttException e){
+            LOGGER.error(e.getMessage(), e);
+        }
+    }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/AddNewExecutorToExecutorPoolCommand.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/AddNewExecutorToExecutorPoolCommand.java
@ -2,8 +2,7 @@ package ch.unisg.executorpool.application.port.in;

 import ch.unisg.common.SelfValidating;
 import ch.unisg.executorpool.domain.ExecutorPool;
-import ch.unisg.executorpool.domain.ExecutorClass.ExecutorIp;
-import ch.unisg.executorpool.domain.ExecutorClass.ExecutorPort;
+import ch.unisg.executorpool.domain.ExecutorClass.ExecutorUri;
 import ch.unisg.executorpool.domain.ExecutorClass.ExecutorTaskType;
 import lombok.Value;
 import javax.validation.constraints.NotNull;
@ -11,17 +10,13 @@ import javax.validation.constraints.NotNull;
@Value
 public class AddNewExecutorToExecutorPoolCommand extends SelfValidating<AddNewExecutorToExecutorPoolCommand> {
    @NotNull
-    private final ExecutorIp executorIp;
-
-    @NotNull
-    private final ExecutorPort executorPort;
+    private final ExecutorUri executorUri;

    @NotNull
    private final ExecutorTaskType executorTaskType;

-    public AddNewExecutorToExecutorPoolCommand(ExecutorIp executorIp, ExecutorPort executorPort, ExecutorTaskType executorTaskType){
-        this.executorIp = executorIp;
-        this.executorPort = executorPort;
+    public AddNewExecutorToExecutorPoolCommand(ExecutorUri executorUri, ExecutorTaskType executorTaskType){
+        this.executorUri = executorUri;
        this.executorTaskType = executorTaskType;
        this.validateSelf();
    }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/GetAllExecutorInExecutorPoolByTypeUseCase.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/GetAllExecutorInExecutorPoolByTypeUseCase.java
@ -1,9 +0,0 @@
-package ch.unisg.executorpool.application.port.in;
-
-import ch.unisg.executorpool.domain.ExecutorClass;
-
-import java.util.List;
-
-public interface GetAllExecutorInExecutorPoolByTypeUseCase {
-    List<ExecutorClass> getAllExecutorInExecutorPoolByType(GetAllExecutorInExecutorPoolByTypeQuery query);
-}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/GetAllExecutorsInExecutorPoolByTypeQuery.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/GetAllExecutorsInExecutorPoolByTypeQuery.java
@ -7,11 +7,11 @@ import lombok.Value;
 import javax.validation.constraints.NotNull;

@Value
-public class GetAllExecutorInExecutorPoolByTypeQuery extends SelfValidating<GetAllExecutorInExecutorPoolByTypeQuery> {
+public class GetAllExecutorsInExecutorPoolByTypeQuery extends SelfValidating<GetAllExecutorsInExecutorPoolByTypeQuery> {
    @NotNull
    private final ExecutorTaskType executorTaskType;

-    public GetAllExecutorInExecutorPoolByTypeQuery(ExecutorTaskType executorTaskType){
+    public GetAllExecutorsInExecutorPoolByTypeQuery(ExecutorTaskType executorTaskType){
        this.executorTaskType = executorTaskType;
        this.validateSelf();
    }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/GetAllExecutorsInExecutorPoolByTypeUseCase.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/GetAllExecutorsInExecutorPoolByTypeUseCase.java
@ -0,0 +1,9 @@
+package ch.unisg.executorpool.application.port.in;
+
+import ch.unisg.executorpool.domain.ExecutorClass;
+
+import java.util.List;
+
+public interface GetAllExecutorsInExecutorPoolByTypeUseCase {
+    List<ExecutorClass> getAllExecutorsInExecutorPoolByType(GetAllExecutorsInExecutorPoolByTypeQuery query);
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/RemoveExecutorFromExecutorPoolCommand.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/in/RemoveExecutorFromExecutorPoolCommand.java
@ -1,9 +1,7 @@
 package ch.unisg.executorpool.application.port.in;

-import ch.unisg.executorpool.domain.ExecutorClass;
 import ch.unisg.common.SelfValidating;
-import ch.unisg.executorpool.domain.ExecutorClass.ExecutorIp;
-import ch.unisg.executorpool.domain.ExecutorClass.ExecutorPort;
+import ch.unisg.executorpool.domain.ExecutorClass.ExecutorUri;
 import lombok.Value;

 import javax.validation.constraints.NotNull;
@ -11,14 +9,10 @@ import javax.validation.constraints.NotNull;
@Value
 public class RemoveExecutorFromExecutorPoolCommand extends SelfValidating<RemoveExecutorFromExecutorPoolCommand> {
    @NotNull
-    private final ExecutorIp executorIp;
+    private final ExecutorUri executorUri;

-    @NotNull
-    private final ExecutorPort executorPort;
-
-    public RemoveExecutorFromExecutorPoolCommand(ExecutorIp executorIp, ExecutorPort executorPort){
-        this.executorIp = executorIp;
-        this.executorPort = executorPort;
+    public RemoveExecutorFromExecutorPoolCommand(ExecutorUri executorUri){
+        this.executorUri = executorUri;
        this.validateSelf();
    }
 }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/out/ExecutorAddedEventPort.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/out/ExecutorAddedEventPort.java
@ -0,0 +1,8 @@
+package ch.unisg.executorpool.application.port.out;
+
+import ch.unisg.executorpool.domain.ExecutorAddedEvent;
+import org.eclipse.paho.client.mqttv3.MqttException;
+
+public interface ExecutorAddedEventPort {
+    void publishExecutorAddedEvent(ExecutorAddedEvent event);
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/port/out/ExecutorRemovedEventPort.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/port/out/ExecutorRemovedEventPort.java
@ -0,0 +1,7 @@
+package ch.unisg.executorpool.application.port.out;
+
+import ch.unisg.executorpool.domain.ExecutorRemovedEvent;
+
+public interface ExecutorRemovedEventPort {
+    void publishExecutorRemovedEvent(ExecutorRemovedEvent event);
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/service/AddNewExecutorToExecutorPoolService.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/service/AddNewExecutorToExecutorPoolService.java
@ -2,24 +2,33 @@ package ch.unisg.executorpool.application.service;

 import ch.unisg.executorpool.application.port.in.AddNewExecutorToExecutorPoolUseCase;
 import ch.unisg.executorpool.application.port.in.AddNewExecutorToExecutorPoolCommand;
+import ch.unisg.executorpool.application.port.out.ExecutorAddedEventPort;
+import ch.unisg.executorpool.domain.ExecutorAddedEvent;
 import ch.unisg.executorpool.domain.ExecutorClass;
 import ch.unisg.executorpool.domain.ExecutorPool;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
-import org.yaml.snakeyaml.constructor.DuplicateKeyException;

 import javax.transaction.Transactional;
-import javax.validation.ConstraintViolationException;

-@RequiredArgsConstructor
@Component
@Transactional
 public class AddNewExecutorToExecutorPoolService implements AddNewExecutorToExecutorPoolUseCase {

+    private final ExecutorAddedEventPort executorAddedEventPort;
+
+    public AddNewExecutorToExecutorPoolService(ExecutorAddedEventPort executorAddedEventPort){
+        this.executorAddedEventPort = executorAddedEventPort;
+    }
+
    @Override
    public ExecutorClass addNewExecutorToExecutorPool(AddNewExecutorToExecutorPoolCommand command){
        ExecutorPool executorPool = ExecutorPool.getExecutorPool();
+        var newExecutor = executorPool.addNewExecutor(command.getExecutorUri(), command.getExecutorTaskType());

-        return executorPool.addNewExecutor(command.getExecutorIp(), command.getExecutorPort(), command.getExecutorTaskType());
+        var executorAddedEvent = new ExecutorAddedEvent(newExecutor);
+        executorAddedEventPort.publishExecutorAddedEvent(executorAddedEvent);
+
+        return newExecutor;
    }
 }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/service/GetAllExecutorsInExecutorPoolByTypeService.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/service/GetAllExecutorsInExecutorPoolByTypeService.java
@ -1,7 +1,7 @@
 package ch.unisg.executorpool.application.service;

-import ch.unisg.executorpool.application.port.in.GetAllExecutorInExecutorPoolByTypeQuery;
-import ch.unisg.executorpool.application.port.in.GetAllExecutorInExecutorPoolByTypeUseCase;
+import ch.unisg.executorpool.application.port.in.GetAllExecutorsInExecutorPoolByTypeQuery;
+import ch.unisg.executorpool.application.port.in.GetAllExecutorsInExecutorPoolByTypeUseCase;
 import ch.unisg.executorpool.domain.ExecutorClass;
 import ch.unisg.executorpool.domain.ExecutorPool;
 import lombok.RequiredArgsConstructor;
@ -13,10 +13,10 @@ import java.util.List;
@RequiredArgsConstructor
@Component
@Transactional
-public class GetAllExecutorInExecutorPoolByTypeService implements GetAllExecutorInExecutorPoolByTypeUseCase {
+public class GetAllExecutorsInExecutorPoolByTypeService implements GetAllExecutorsInExecutorPoolByTypeUseCase {

    @Override
-    public List<ExecutorClass> getAllExecutorInExecutorPoolByType(GetAllExecutorInExecutorPoolByTypeQuery query){
+    public List<ExecutorClass> getAllExecutorsInExecutorPoolByType(GetAllExecutorsInExecutorPoolByTypeQuery query){
        ExecutorPool executorPool = ExecutorPool.getExecutorPool();
        return executorPool.getAllExecutorsByType(query.getExecutorTaskType());
    }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/application/service/RemoveExecutorFromExecutorPoolService.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/application/service/RemoveExecutorFromExecutorPoolService.java
@ -2,21 +2,36 @@ package ch.unisg.executorpool.application.service;

 import ch.unisg.executorpool.application.port.in.RemoveExecutorFromExecutorPoolCommand;
 import ch.unisg.executorpool.application.port.in.RemoveExecutorFromExecutorPoolUseCase;
+import ch.unisg.executorpool.application.port.out.ExecutorRemovedEventPort;
 import ch.unisg.executorpool.domain.ExecutorClass;
 import ch.unisg.executorpool.domain.ExecutorPool;
+import ch.unisg.executorpool.domain.ExecutorRemovedEvent;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;

 import javax.transaction.Transactional;
 import java.util.Optional;

-@RequiredArgsConstructor
@Component
@Transactional
 public class RemoveExecutorFromExecutorPoolService implements RemoveExecutorFromExecutorPoolUseCase {
+
+    private final ExecutorRemovedEventPort executorRemovedEventPort;
+
+    public RemoveExecutorFromExecutorPoolService(ExecutorRemovedEventPort executorRemovedEventPort){
+        this.executorRemovedEventPort = executorRemovedEventPort;
+    }
+
    @Override
    public Optional<ExecutorClass> removeExecutorFromExecutorPool(RemoveExecutorFromExecutorPoolCommand command){
        ExecutorPool executorPool = ExecutorPool.getExecutorPool();
-        return executorPool.removeExecutorByIpAndPort(command.getExecutorIp(), command.getExecutorPort());
+        var removedExecutor = executorPool.removeExecutorByIpAndPort(command.getExecutorUri());
+
+        if(removedExecutor.isPresent()){
+            var executorRemovedEvent = new ExecutorRemovedEvent(removedExecutor.get());
+            executorRemovedEventPort.publishExecutorRemovedEvent(executorRemovedEvent);
+        }
+
+        return removedExecutor;
    }
 }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorAddedEvent.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorAddedEvent.java
@ -0,0 +1,10 @@
+package ch.unisg.executorpool.domain;
+
+import lombok.Getter;
+
+public class ExecutorAddedEvent {
+    @Getter
+    private ExecutorClass executorClass;
+
+    public ExecutorAddedEvent(ExecutorClass executorClass) { this.executorClass = executorClass; }
+}
--- a/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorClass.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorClass.java
@ -3,36 +3,29 @@ package ch.unisg.executorpool.domain;
 import lombok.Getter;
 import lombok.Value;

+import java.net.URI;
+
 public class ExecutorClass {

    @Getter
-    private final ExecutorIp executorIp;
-
-    @Getter
-    private final ExecutorPort executorPort;
+    private final ExecutorUri executorUri;

    @Getter
    private final ExecutorTaskType executorTaskType;

-    public ExecutorClass(ExecutorIp executorIp, ExecutorPort executorPort, ExecutorTaskType executorTaskType){
-        this.executorIp = executorIp;
-        this.executorPort = executorPort;
+    public ExecutorClass(ExecutorUri executorUri, ExecutorTaskType executorTaskType){
+        this.executorUri = executorUri;
        this.executorTaskType = executorTaskType;
    }

-    protected static ExecutorClass createExecutorClass(ExecutorIp executorIp, ExecutorPort executorPort, ExecutorTaskType executorTaskType){
-        System.out.println("New Task: " + executorIp.getValue() + " " + executorPort.getValue() + " " + executorTaskType.getValue());
-        return new ExecutorClass(executorIp, executorPort, executorTaskType);
+    protected static ExecutorClass createExecutorClass(ExecutorUri executorUri, ExecutorTaskType executorTaskType){
+        System.out.println("New Executor: " + executorUri.value.toString() + " " + executorTaskType.getValue());
+        return new ExecutorClass(executorUri, executorTaskType);
    }

    @Value
-    public static class ExecutorIp {
-        private String value;
-    }
-
-    @Value
-    public static class ExecutorPort {
-        private String value;
+    public static class ExecutorUri {
+        private URI value;
    }

    @Value
--- a/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorPool.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorPool.java
@ -1,5 +1,8 @@
 package ch.unisg.executorpool.domain;

+import ch.unisg.executorpool.domain.ExecutorClass.ExecutorUri;
+import ch.unisg.executorpool.domain.ExecutorClass.ExecutorTaskType;
+
 import lombok.Getter;
 import lombok.Value;

@ -20,19 +23,17 @@ public class ExecutorPool {

    public static ExecutorPool getExecutorPool() { return executorPool; }

-    public ExecutorClass addNewExecutor(ExecutorClass.ExecutorIp executorIp, ExecutorClass.ExecutorPort executorPort, ExecutorClass.ExecutorTaskType executorTaskType){
-        ExecutorClass newExecutor = ExecutorClass.createExecutorClass(executorIp, executorPort, executorTaskType);
+    public ExecutorClass addNewExecutor(ExecutorUri executorUri, ExecutorTaskType executorTaskType){
+        ExecutorClass newExecutor = ExecutorClass.createExecutorClass(executorUri, executorTaskType);
        listOfExecutors.value.add(newExecutor);
        System.out.println("Number of executors: " + listOfExecutors.value.size());
        return newExecutor;
    }

-    public Optional<ExecutorClass> getExecutorByIpAndPort(ExecutorClass.ExecutorIp executorIp, ExecutorClass.ExecutorPort executorPort){
+    public Optional<ExecutorClass> getExecutorByUri(ExecutorUri executorUri){

        for (ExecutorClass executor : listOfExecutors.value ) {
-            // TODO can this be simplified by overwriting equals()?
-            if(executor.getExecutorIp().getValue().equalsIgnoreCase(executorIp.getValue()) &&
-                    executor.getExecutorPort().getValue().equalsIgnoreCase(executorPort.getValue())){
+            if(executor.getExecutorUri().getValue().equals(executorUri)){
                return Optional.of(executor);
            }
        }
@ -54,11 +55,10 @@ public class ExecutorPool {
        return matchedExecutors;
    }

-    public Optional<ExecutorClass> removeExecutorByIpAndPort(ExecutorClass.ExecutorIp executorIp, ExecutorClass.ExecutorPort executorPort){
+    public Optional<ExecutorClass> removeExecutorByIpAndPort(ExecutorUri executorUri){
        for (ExecutorClass executor : listOfExecutors.value ) {
            // TODO can this be simplified by overwriting equals()?
-            if(executor.getExecutorIp().getValue().equalsIgnoreCase(executorIp.getValue()) &&
-                    executor.getExecutorPort().getValue().equalsIgnoreCase(executorPort.getValue())){
+            if(executor.getExecutorUri().getValue().equals(executorUri.getValue())){
                listOfExecutors.value.remove(executor);
                return Optional.of(executor);
            }
--- a/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorRemovedEvent.java
+++ b/executor-pool/src/main/java/ch/unisg/executorpool/domain/ExecutorRemovedEvent.java
@ -0,0 +1,11 @@
+package ch.unisg.executorpool.domain;
+
+import ch.unisg.executorpool.domain.ExecutorClass;
+import lombok.Getter;
+
+public class ExecutorRemovedEvent {
+    @Getter
+    private ExecutorClass executorClass;
+
+    public ExecutorRemovedEvent(ExecutorClass executorClass) { this.executorClass = executorClass; }
+}
--- a/executor-pool/src/main/resources/application.properties
+++ b/executor-pool/src/main/resources/application.properties
@ -1 +1,3 @@
 server.port=8083
+
+mqtt.broker.uri=tcp://broker.hivemq.com:1883
--- a/Show More
+++ b/Show More