diff --git a/.deployment/docker-compose.yml b/.deployment/docker-compose.yml
index 01a5a77..5a1329f 100644
--- a/.deployment/docker-compose.yml
+++ b/.deployment/docker-compose.yml
@@ -56,20 +56,20 @@ services:
             - "traefik.http.routers.tapas-auction-house.entryPoints=web,websecure"
             - "traefik.http.routers.tapas-auction-house.tls.certresolver=le"
 
-    assignment:
+    roster:
         image: openjdk
-        command: "java -jar /data/assignment-0.0.1-SNAPSHOT.jar"
+        command: "java -jar /data/roster-0.0.1-SNAPSHOT.jar"
         restart: unless-stopped
         volumes:
             - ./:/data/
         labels:
             - "traefik.enable=true"
-            - "traefik.http.routers.assignment.rule=Host(`assignment.${PUB_IP}.nip.io`)"
-            - "traefik.http.routers.assignment.service=assignment"
-            - "traefik.http.services.assignment.loadbalancer.server.port=8082"
-            - "traefik.http.routers.assignment.tls=true"
-            - "traefik.http.routers.assignment.entryPoints=web,websecure"
-            - "traefik.http.routers.assignment.tls.certresolver=le"
+            - "traefik.http.routers.roster.rule=Host(`roster.${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
@@ -86,38 +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"
diff --git a/.github/workflows/build-and-deploy.yml b/.github/workflows/build-and-deploy.yml
index d223887..7290452 100644
--- a/.github/workflows/build-and-deploy.yml
+++ b/.github/workflows/build-and-deploy.yml
@@ -33,30 +33,33 @@ 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 with Maven
+            - 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
 
diff --git a/.github/workflows/ci.assignment.yml b/.github/workflows/ci.assignment.yml
deleted file mode 100644
index 394fe54..0000000
--- a/.github/workflows/ci.assignment.yml
+++ /dev/null
@@ -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
diff --git a/.github/workflows/ci.executor2.yml b/.github/workflows/ci.executor-computation.yml
similarity index 75%
rename from .github/workflows/ci.executor2.yml
rename to .github/workflows/ci.executor-computation.yml
index 5ae38f0..5832883 100644
--- a/.github/workflows/ci.executor2.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
diff --git a/.github/workflows/ci.executor1.yml b/.github/workflows/ci.executor-robot.yml
similarity index 76%
rename from .github/workflows/ci.executor1.yml
rename to .github/workflows/ci.executor-robot.yml
index 708d7d4..7a216aa 100644
--- a/.github/workflows/ci.executor1.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
diff --git a/.github/workflows/ci.roster.yml b/.github/workflows/ci.roster.yml
new file mode 100644
index 0000000..b38355e
--- /dev/null
+++ 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
diff --git 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
index 8fda5ac..66ef496 100644
--- 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
@@ -1,5 +1,7 @@
 package ch.unisg.executorbase.executor.adapter.in.web;
 
+import java.util.logging.Logger;
+
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -19,6 +21,8 @@ public class TaskAvailableController {
         this.taskAvailableUseCase = taskAvailableUseCase;
     }
 
+    Logger logger = Logger.getLogger(TaskAvailableController.class.getName());
+
     /**
     *   Controller for notification about new events.
     *   @return 200 OK
@@ -26,6 +30,8 @@ public class TaskAvailableController {
     @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()));
diff --git 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
index a5ae910..58f6287 100644
--- 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
@@ -16,8 +16,9 @@ import ch.unisg.executorbase.executor.domain.ExecutionFinishedEvent;
 
 public class ExecutionFinishedEventAdapter implements ExecutionFinishedEventPort {
 
+    // TODO url doesn't get mapped bc no autowiring
     @Value("${roster.url}")
-    String server;
+    String server = "http://localhost:8082";
 
     Logger logger = Logger.getLogger(ExecutionFinishedEventAdapter.class.getName());
 
@@ -28,6 +29,9 @@ public class ExecutionFinishedEventAdapter implements ExecutionFinishedEventPort
     @Override
     public void publishExecutionFinishedEvent(ExecutionFinishedEvent event) {
 
+        System.out.println("HI");
+        System.out.println(server);
+
         String body = new JSONObject()
         .put("taskID", event.getTaskID())
         .put("result", event.getResult())
@@ -41,6 +45,9 @@ public class ExecutionFinishedEventAdapter implements ExecutionFinishedEventPort
                 .POST(HttpRequest.BodyPublishers.ofString(body))
                 .build();
 
+
+        System.out.println(server);
+
         try {
             client.send(request, HttpResponse.BodyHandlers.ofString());
         } catch (InterruptedException e) {
@@ -50,7 +57,7 @@ public class ExecutionFinishedEventAdapter implements ExecutionFinishedEventPort
             logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
         }
 
-        logger.log(Level.INFO, "Finish execution event sent with result: {}", event.getResult());
+        logger.log(Level.INFO, "Finish execution event sent with result: {0}", event.getResult());
 
     }
 
diff --git 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
index 3ed4e37..dd82c81 100644
--- 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
@@ -23,8 +23,9 @@ 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;
+    String server = "http://127.0.0.1:8082";
 
     Logger logger = Logger.getLogger(GetAssignmentAdapter.class.getName());
 
@@ -51,12 +52,15 @@ public class GetAssignmentAdapter implements GetAssignmentPort {
         try {
             logger.info("Sending getAssignment Request");
             HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
-            logger.log(Level.INFO, "getAssignment request result:\n {}", response.body());
+            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(responseBody.getString("taskID"), responseBody.getString("input"));
+
+            String[] input = { "1", "+", "2" };
+            // TODO Add input in roster + tasklist
+            return new Task(responseBody.getString("taskID"), input);
 
         } catch (InterruptedException e) {
             logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
diff --git 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
index 2dba64f..abc0cf5 100644
--- 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
@@ -22,8 +22,9 @@ import ch.unisg.executorbase.executor.domain.ExecutorType;
 @Primary
 public class NotifyExecutorPoolAdapter implements NotifyExecutorPoolPort {
 
-    @Value("${executor-pool.url}")
-    String server;
+    // TODO Not working for now bc it doesn't get autowired
+    @Value("${executor.pool.url}")
+    String server = "http://127.0.0.1:8083";
 
     Logger logger = Logger.getLogger(NotifyExecutorPoolAdapter.class.getName());
 
@@ -36,7 +37,7 @@ public class NotifyExecutorPoolAdapter implements NotifyExecutorPoolPort {
 
         String body = new JSONObject()
             .put("executorTaskType", executorType)
-            .put("executorURI", executorURI.getValue())
+            .put("executorUri", executorURI.getValue())
             .toString();
 
         HttpClient client = HttpClient.newHttpClient();
diff --git 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
index 122ea4b..b8e8631 100644
--- 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
@@ -23,9 +23,8 @@ public abstract class ExecutorBase {
     @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 implement the execution as a service but there still is the problem with the startup request.
-    // 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();
@@ -38,8 +37,8 @@ public abstract class ExecutorBase {
         this.status = ExecutorStatus.STARTING_UP;
         this.executorType = executorType;
         // TODO set this automaticly
-        this.executorURI = new ExecutorURI("localhost:8084");
-
+        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);
@@ -55,6 +54,8 @@ public abstract class ExecutorBase {
     **/
     public void getAssignment() {
         Task newTask = getAssignmentPort.getAssignment(this.getExecutorType(), this.getExecutorURI());
+        System.out.println("New assignment");
+        System.out.println(newTask);
         if (newTask != null) {
             this.executeTask(newTask);
         } else {
@@ -72,6 +73,8 @@ public abstract class ExecutorBase {
 
         task.setResult(execution(task.getInput()));
 
+        System.out.println(task.getResult());
+
         // TODO implement logic if execution was not successful
         executionFinishedEventPort.publishExecutionFinishedEvent(
             new ExecutionFinishedEvent(task.getTaskID(), task.getResult(), "SUCCESS"));
diff --git a/executor-base/src/main/resources/application.properties b/executor-base/src/main/resources/application.properties
index 3eee96a..4316ebf 100644
--- a/executor-base/src/main/resources/application.properties
+++ b/executor-base/src/main/resources/application.properties
@@ -1,6 +1,6 @@
 server.port=8081
 roster.url=http://127.0.0.1:8082
-executor-pool.url=http://127.0.0.1:8083
+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
diff --git a/executorcomputation/src/main/java/ch/unisg/executorcomputation/executor/domain/Executor.java b/executorcomputation/src/main/java/ch/unisg/executorcomputation/executor/domain/Executor.java
index eb09699..c3fbb67 100644
--- a/executorcomputation/src/main/java/ch/unisg/executorcomputation/executor/domain/Executor.java
+++ b/executorcomputation/src/main/java/ch/unisg/executorcomputation/executor/domain/Executor.java
@@ -21,16 +21,18 @@ public class Executor extends ExecutorBase {
     protected
     String execution(String... input) {
 
+        System.out.println(input);
+
         double result = Double.NaN;
         int a = Integer.parseInt(input[0]);
         int b = Integer.parseInt(input[2]);
         String operation = input[1];
 
-        try {
-            TimeUnit.SECONDS.sleep(20);
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
+        // try {
+        //     TimeUnit.SECONDS.sleep(20);
+        // } catch (InterruptedException e) {
+        //     e.printStackTrace();
+        // }
 
         if (operation == "+") {
             result = a + b;
@@ -40,7 +42,9 @@ public class Executor extends ExecutorBase {
             result = a - b;
         }
 
+        System.out.println("finish");
+
         return Double.toString(result);
     }
 
-}
\ No newline at end of file
+}
diff --git a/roster/src/main/java/ch/unisg/roster/RosterApplication.java b/roster/src/main/java/ch/unisg/roster/RosterApplication.java
index dd57a5d..bc18c54 100644
--- a/roster/src/main/java/ch/unisg/roster/RosterApplication.java
+++ b/roster/src/main/java/ch/unisg/roster/RosterApplication.java
@@ -1,13 +1,41 @@
 package ch.unisg.roster;
 
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.eclipse.paho.client.mqttv3.MqttException;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+import ch.unisg.roster.roster.adapter.common.clients.TapasMqttClient;
+import ch.unisg.roster.roster.adapter.in.messaging.mqtt.ExecutorEventMqttListener;
+import ch.unisg.roster.roster.adapter.in.messaging.mqtt.ExecutorEventsMqttDispatcher;
+
 @SpringBootApplication
 public class RosterApplication {
 
+    static Logger logger = Logger.getLogger(RosterApplication.class.getName());
+
+    public static String MQTT_BROKER = "tcp://localhost:1883";
+
 	public static void main(String[] args) {
 		SpringApplication.run(RosterApplication.class, args);
+
+        bootstrapMarketplaceWithMqtt();
 	}
 
+    /**
+     * Connects to an MQTT broker, presumably the one used by all TAPAS groups to communicate with
+     * one another
+     */
+    private static void bootstrapMarketplaceWithMqtt() {
+        try {
+            ExecutorEventsMqttDispatcher dispatcher = new ExecutorEventsMqttDispatcher();
+            TapasMqttClient client = TapasMqttClient.getInstance(MQTT_BROKER, dispatcher);
+            client.startReceivingMessages();
+        } catch (MqttException e) {
+            logger.log(Level.SEVERE, e.getMessage(), e);
+        }
+    }
+
 }
diff --git a/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorAddedEventListenerMqttAdapter.java b/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorAddedEventListenerMqttAdapter.java
index 1c3cbcd..10e907e 100644
--- a/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorAddedEventListenerMqttAdapter.java
+++ b/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorAddedEventListenerMqttAdapter.java
@@ -17,6 +17,9 @@ public class ExecutorAddedEventListenerMqttAdapter extends ExecutorEventMqttList
 
     @Override
     public boolean handleEvent(MqttMessage message) {
+
+        System.out.println("New Executor added!");
+
         String payload = new String(message.getPayload());
 
         try {
@@ -25,7 +28,7 @@ public class ExecutorAddedEventListenerMqttAdapter extends ExecutorEventMqttList
             JsonNode data = new ObjectMapper().readTree(payload);
 
             String taskType = data.get("executorTaskType").asText();
-            String executorId = data.get("executorURI").asText();
+            String executorId = data.get("executorUri").asText();
 
             ExecutorAddedEvent executorAddedEvent = new ExecutorAddedEvent(
                 new ExecutorURI(executorId),
diff --git a/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorEventsMqttDispatcher.java b/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorEventsMqttDispatcher.java
index caa6202..c1b7649 100644
--- a/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorEventsMqttDispatcher.java
+++ b/roster/src/main/java/ch/unisg/roster/roster/adapter/in/messaging/mqtt/ExecutorEventsMqttDispatcher.java
@@ -16,8 +16,8 @@ public class ExecutorEventsMqttDispatcher {
 
     // TODO: Register here your topics and event listener adapters
     private void initRouter() {
-        router.put("ch/unisg/tapas-group-tutors/executors/added", new ExecutorAddedEventListenerMqttAdapter());
-        router.put("ch/unisg/tapas-group-tutors/executors/removed", new ExecutorRemovedEventListenerMqttAdapter());
+        router.put("ch/unisg/tapas/executors/added", new ExecutorAddedEventListenerMqttAdapter());
+        router.put("ch/unisg/tapas/executors/removed", new ExecutorRemovedEventListenerMqttAdapter());
     }
 
     /**
diff --git a/roster/src/main/java/ch/unisg/roster/roster/adapter/in/web/NewTaskController.java b/roster/src/main/java/ch/unisg/roster/roster/adapter/in/web/NewTaskController.java
index af01346..98b3ac7 100644
--- a/roster/src/main/java/ch/unisg/roster/roster/adapter/in/web/NewTaskController.java
+++ b/roster/src/main/java/ch/unisg/roster/roster/adapter/in/web/NewTaskController.java
@@ -1,5 +1,7 @@
 package ch.unisg.roster.roster.adapter.in.web;
 
+import java.util.logging.Logger;
+
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -18,6 +20,8 @@ public class NewTaskController {
         this.newTaskUseCase = newTaskUseCase;
     }
 
+    Logger logger = Logger.getLogger(NewTaskController.class.getName());
+
     /**
     *   Controller which handles the new task event from the tasklist
     *   @return 201 Create or 409 Conflict
@@ -25,10 +29,14 @@ public class NewTaskController {
     @PostMapping(path = "/task", consumes = {"application/task+json"})
     public ResponseEntity<Void> newTaskController(@RequestBody Task task) {
 
+            logger.info("New task with id:" + task.getTaskID());
+
             NewTaskCommand command = new NewTaskCommand(task.getTaskID(), task.getTaskType());
 
             boolean success = newTaskUseCase.addNewTaskToQueue(command);
 
+            logger.info("Could create task: " + success);
+
             if (success) {
                 return new ResponseEntity<>(HttpStatus.CREATED);
             }
diff --git a/roster/src/main/java/ch/unisg/roster/roster/adapter/out/web/PublishNewTaskEventAdapter.java b/roster/src/main/java/ch/unisg/roster/roster/adapter/out/web/PublishNewTaskEventAdapter.java
index 6a6b7f7..0b16567 100644
--- a/roster/src/main/java/ch/unisg/roster/roster/adapter/out/web/PublishNewTaskEventAdapter.java
+++ b/roster/src/main/java/ch/unisg/roster/roster/adapter/out/web/PublishNewTaskEventAdapter.java
@@ -34,21 +34,23 @@ public class PublishNewTaskEventAdapter implements NewTaskEventPort {
     @Override
     public void publishNewTaskEvent(NewTaskEvent event) {
 
-        HttpClient client = HttpClient.newHttpClient();
-        HttpRequest request = HttpRequest.newBuilder()
-                .uri(URI.create(server + "/newtask/" + event.taskType.getValue()))
-                .GET()
-                .build();
+        System.out.println(server2);
+
+        // 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 (InterruptedException e) {
-            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
-            Thread.currentThread().interrupt();
-        } catch (IOException e) {
-            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
-        }
+        // try {
+        //     client.send(request, HttpResponse.BodyHandlers.ofString());
+        // } catch (InterruptedException e) {
+        //     logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+        //     Thread.currentThread().interrupt();
+        // } catch (IOException e) {
+        //     logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+        // }
 
         HttpClient client2 = HttpClient.newHttpClient();
         HttpRequest request2 = HttpRequest.newBuilder()
diff --git a/roster/src/main/java/ch/unisg/roster/roster/application/service/NewTaskService.java b/roster/src/main/java/ch/unisg/roster/roster/application/service/NewTaskService.java
index 588ed04..c6e1685 100644
--- a/roster/src/main/java/ch/unisg/roster/roster/application/service/NewTaskService.java
+++ b/roster/src/main/java/ch/unisg/roster/roster/application/service/NewTaskService.java
@@ -29,6 +29,7 @@ public class NewTaskService implements NewTaskUseCase {
     public boolean addNewTaskToQueue(NewTaskCommand command) {
 
         ExecutorRegistry executorRegistry = ExecutorRegistry.getInstance();
+
         if (!executorRegistry.containsTaskType(command.getTaskType())) {
             return false;
         }