Adding a MongoDB repository and extending the use cases for adding new tasks and retrieval of a new task

docker-compose.yml

@@ -70,3 +70,36 @@ services:
       - "traefik.http.routers.app.tls=true"
       - "traefik.http.routers.app.entryPoints=web,websecure"
       - "traefik.http.routers.app.tls.certresolver=le"
+
+  mongodb:
+    image: mongo
+    container_name: mongodb
+    restart: unless-stopped
+    environment:
+      MONGO_INITDB_ROOT_USERNAME: root
+      MONGO_INITDB_ROOT_PASSWORD: 8nP7s0a    # Can not be changed again later on
+    volumes:
+      - database:/data/db
+
+  dbadmin:
+    image: mongo-express
+    container_name: dbadmin
+    restart: unless-stopped
+    environment:
+      ME_CONFIG_BASICAUTH_USERNAME: student    # Access to web interface: username
+      ME_CONFIG_BASICAUTH_PASSWORD: studious   # Access to web interface: password
+      ME_CONFIG_MONGODB_ADMINUSERNAME: root
+      ME_CONFIG_MONGODB_ADMINPASSWORD: 8nP7s0a  # must correspond to the db
+      ME_CONFIG_MONGODB_PORT: 27017 # Default 27017
+      ME_CONFIG_MONGODB_SERVER: mongodb
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.dbadmin.rule=Host(`dbadmin1.${PUB_IP}.nip.io`)"
+      - "traefik.http.routers.dbadmin.service=dbadmin"
+      - "traefik.http.services.dbadmin.loadbalancer.server.port=8081"
+      - "traefik.http.routers.dbadmin.tls=true"
+      - "traefik.http.routers.dbadmin.entryPoints=web,websecure"
+      - "traefik.http.routers.dbadmin.tls.certresolver=le"
+
+volumes:
+  database:

tapas-tasks/pom.xml

@@ -27,6 +27,15 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-mongodb</artifactId>
+            <version>3.2.6</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-mongodb</artifactId>
+        </dependency>
 
 		<dependency>
 			<groupId>org.projectlombok</groupId>

tapas-tasks/src/main/java/ch/unisg/tapastasks/TapasTasksApplication.java

@@ -1,14 +1,20 @@
 package ch.unisg.tapastasks;
 
+import ch.unisg.tapastasks.tasks.adapter.out.persistence.mongodb.TaskRepository;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
 
 @SpringBootApplication
+@EnableMongoRepositories(basePackageClasses = TaskRepository.class)
 public class TapasTasksApplication {
 
 	public static void main(String[] args) {
 		SpringApplication tapasTasksApp = new SpringApplication(TapasTasksApplication.class);
 		tapasTasksApp.run(args);
+
+
+
 	}
 
 }

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/adapter/out/persistence/mongodb/MongoTaskDocument.java

@@ -0,0 +1,32 @@
+package ch.unisg.tapastasks.tasks.adapter.out.persistence.mongodb;
+
+import lombok.Data;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Data
+@Document(collection = "tasks")
+public class MongoTaskDocument {
+
+    @Id
+    public String taskId;
+
+    public String taskName;
+    public String taskType;
+    public String originalTaskUri;
+    public String taskStatus;
+    public String taskListName;
+
+
+    public MongoTaskDocument(String taskId, String taskName, String taskType,
+                             String originalTaskUri,
+                             String taskStatus, String taskListName) {
+
+        this.taskId = taskId;
+        this.taskName = taskName;
+        this.taskType = taskType;
+        this.originalTaskUri = originalTaskUri;
+        this.taskStatus = taskStatus;
+        this.taskListName = taskListName;
+    }
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/adapter/out/persistence/mongodb/TaskMapper.java

@@ -0,0 +1,30 @@
+package ch.unisg.tapastasks.tasks.adapter.out.persistence.mongodb;
+
+import ch.unisg.tapastasks.tasks.domain.Task;
+import ch.unisg.tapastasks.tasks.domain.TaskList;
+import org.springframework.stereotype.Component;
+
+@Component
+class TaskMapper {
+
+    Task mapToDomainEntity(MongoTaskDocument task) {
+        return Task.withIdNameTypeOriginaluriStatus(
+            new Task.TaskId(task.taskId),
+            new Task.TaskName(task.taskName),
+            new Task.TaskType(task.taskType),
+            new Task.OriginalTaskUri(task.originalTaskUri),
+            new Task.TaskStatus(Task.Status.valueOf(task.taskStatus))
+        );
+    }
+
+    MongoTaskDocument mapToMongoDocument(Task task) {
+        return new MongoTaskDocument(
+            task.getTaskId().getValue(),
+            task.getTaskName().getValue(),
+            task.getTaskType().getValue(),
+            task.getOriginalTaskUri().getValue(),
+            task.getTaskStatus().getValue().toString(),
+            TaskList.getTapasTaskList().getTaskListName().getValue()
+        );
+    }
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/adapter/out/persistence/mongodb/TaskPersistenceAdapter.java

@@ -0,0 +1,34 @@
+package ch.unisg.tapastasks.tasks.adapter.out.persistence.mongodb;
+
+import ch.unisg.tapastasks.tasks.application.port.out.AddTaskPort;
+import ch.unisg.tapastasks.tasks.application.port.out.LoadTaskPort;
+import ch.unisg.tapastasks.tasks.domain.Task;
+import ch.unisg.tapastasks.tasks.domain.TaskList;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class TaskPersistenceAdapter implements
+    AddTaskPort,
+    LoadTaskPort {
+
+    @Autowired
+    private final TaskRepository taskRepository;
+
+    private final TaskMapper taskMapper;
+
+    @Override
+    public void addTask(Task task) {
+        MongoTaskDocument mongoTaskDocument = taskMapper.mapToMongoDocument(task);
+        taskRepository.save(mongoTaskDocument);
+    }
+
+    @Override
+    public Task loadTask(Task.TaskId taskId, TaskList.TaskListName taskListName) {
+        MongoTaskDocument mongoTaskDocument = taskRepository.findByTaskId(taskId.getValue(),taskListName.getValue());
+        Task task = taskMapper.mapToDomainEntity(mongoTaskDocument);
+        return task;
+    }
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/adapter/out/persistence/mongodb/TaskRepository.java

@@ -0,0 +1,14 @@
+package ch.unisg.tapastasks.tasks.adapter.out.persistence.mongodb;
+
+import org.springframework.data.mongodb.repository.MongoRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface TaskRepository extends MongoRepository<MongoTaskDocument,String> {
+
+    public MongoTaskDocument findByTaskId(String taskId, String taskListName);
+
+    public List<MongoTaskDocument> findByTaskListName(String taskListName);
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/application/port/out/AddTaskPort.java

@@ -0,0 +1,9 @@
+package ch.unisg.tapastasks.tasks.application.port.out;
+
+import ch.unisg.tapastasks.tasks.domain.Task;
+
+public interface AddTaskPort {
+
+    void addTask(Task task);
+
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/application/port/out/LoadTaskPort.java

@@ -0,0 +1,10 @@
+package ch.unisg.tapastasks.tasks.application.port.out;
+
+import ch.unisg.tapastasks.tasks.domain.Task;
+import ch.unisg.tapastasks.tasks.domain.TaskList;
+
+public interface LoadTaskPort {
+
+    Task loadTask(Task.TaskId taskId, TaskList.TaskListName taskListName);
+
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/application/port/out/TaskListLock.java

@@ -0,0 +1,11 @@
+package ch.unisg.tapastasks.tasks.application.port.out;
+
+import ch.unisg.tapastasks.tasks.domain.TaskList;
+
+public interface TaskListLock {
+
+    void lockTaskList(TaskList.TaskListName taskListName);
+
+    void releaseTaskList(TaskList.TaskListName taskListName);
+
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/application/service/AddNewTaskToTaskListService.java

@@ -2,7 +2,9 @@ package ch.unisg.tapastasks.tasks.application.service;
 
 import ch.unisg.tapastasks.tasks.application.port.in.AddNewTaskToTaskListCommand;
 import ch.unisg.tapastasks.tasks.application.port.in.AddNewTaskToTaskListUseCase;
+import ch.unisg.tapastasks.tasks.application.port.out.AddTaskPort;
 import ch.unisg.tapastasks.tasks.application.port.out.NewTaskAddedEventPort;
+import ch.unisg.tapastasks.tasks.application.port.out.TaskListLock;
 import ch.unisg.tapastasks.tasks.domain.Task;
 
 import ch.unisg.tapastasks.tasks.domain.NewTaskAddedEvent;
@@ -17,11 +19,14 @@ import javax.transaction.Transactional;
 public class AddNewTaskToTaskListService implements AddNewTaskToTaskListUseCase {
 
     private final NewTaskAddedEventPort newTaskAddedEventPort;
+    private final AddTaskPort addTaskToRepositoryPort;
+    private final TaskListLock taskListLock;
 
     @Override
     public Task addNewTaskToTaskList(AddNewTaskToTaskListCommand command) {
         TaskList taskList = TaskList.getTapasTaskList();
 
+        taskListLock.lockTaskList(taskList.getTaskListName());
         Task newTask = (command.getOriginalTaskUri().isPresent()) ?
             // Create a delegated task that points back to the original task
             taskList.addNewTaskWithNameAndTypeAndOriginalTaskUri(command.getTaskName(),
@@ -29,6 +34,9 @@ public class AddNewTaskToTaskListService implements AddNewTaskToTaskListUseCase
             // Create an original task
             : taskList.addNewTaskWithNameAndType(command.getTaskName(), command.getTaskType());
 
+        addTaskToRepositoryPort.addTask(newTask);
+        taskListLock.releaseTaskList(taskList.getTaskListName());
+
         //Here we are using the application service to emit the domain event to the outside of the bounded context.
         //This event should be considered as a light-weight "integration event" to communicate with other services.
         //Domain events are usually rather "fat". In our implementation we simplify at this point. In general, it is

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/application/service/NoOpTaskListLock.java

@@ -0,0 +1,18 @@
+package ch.unisg.tapastasks.tasks.application.service;
+
+import ch.unisg.tapastasks.tasks.application.port.out.TaskListLock;
+import ch.unisg.tapastasks.tasks.domain.TaskList;
+import org.springframework.stereotype.Component;
+
+@Component
+public class NoOpTaskListLock implements TaskListLock {
+    @Override
+    public void lockTaskList(TaskList.TaskListName taskListName) {
+        //do nothing
+    }
+
+    @Override
+    public void releaseTaskList(TaskList.TaskListName taskListName) {
+        //do nothing
+    }
+}

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/application/service/RetrieveTaskFromTaskListService.java

@@ -2,6 +2,7 @@ package ch.unisg.tapastasks.tasks.application.service;
 
 import ch.unisg.tapastasks.tasks.application.port.in.RetrieveTaskFromTaskListQuery;
 import ch.unisg.tapastasks.tasks.application.port.in.RetrieveTaskFromTaskListUseCase;
+import ch.unisg.tapastasks.tasks.application.port.out.LoadTaskPort;
 import ch.unisg.tapastasks.tasks.domain.Task;
 import ch.unisg.tapastasks.tasks.domain.TaskList;
 import lombok.RequiredArgsConstructor;
@@ -14,9 +15,17 @@ import java.util.Optional;
 @Component
 @Transactional
 public class RetrieveTaskFromTaskListService implements RetrieveTaskFromTaskListUseCase {
+
+    private final LoadTaskPort loadTaskFromRepositoryPort;
+
     @Override
     public Optional<Task> retrieveTaskFromTaskList(RetrieveTaskFromTaskListQuery query) {
         TaskList taskList = TaskList.getTapasTaskList();
-        return taskList.retrieveTaskById(query.getTaskId());
+
+        Optional<Task> task = taskList.retrieveTaskById(query.getTaskId());
+
+        Optional<Task> taskFromRepo = Optional.ofNullable(loadTaskFromRepositoryPort.loadTask(query.getTaskId(), taskList.getTaskListName()));
+
+        return taskFromRepo;
     }
 }

tapas-tasks/src/main/java/ch/unisg/tapastasks/tasks/domain/Task.java

@@ -49,17 +49,39 @@ public class Task {
         this.outputData = null;
     }
 
-    protected static Task createTaskWithNameAndType(TaskName name, TaskType type) {
+    //Constructor from repo
+    public Task(TaskId taskId, TaskName taskName, TaskType taskType, OriginalTaskUri taskUri,
+                TaskStatus taskStatus) {
+        this.taskId = taskId;
+        this.taskName = taskName;
+        this.taskType = taskType;
+        this.originalTaskUri = taskUri;
+        this.taskStatus = taskStatus;
+        this.inputData = null;
+        this.outputData = null;
+    }
+
+
+    public static Task createTaskWithNameAndType(TaskName name, TaskType type) {
         //This is a simple debug message to see that the request has reached the right method in the core
         System.out.println("New Task: " + name.getValue() + " " + type.getValue());
         return new Task(name, type, null);
     }
 
-    protected static Task createTaskWithNameAndTypeAndOriginalTaskUri(TaskName name, TaskType type,
+    public static Task createTaskWithNameAndTypeAndOriginalTaskUri(TaskName name, TaskType type,
             OriginalTaskUri originalTaskUri) {
         return new Task(name, type, originalTaskUri);
     }
 
+    //This is for recreating a task from a repository.
+    public static Task withIdNameTypeOriginaluriStatus(TaskId taskId, TaskName taskName,
+                                                               TaskType taskType,
+                                                               OriginalTaskUri originalTaskUri,
+                                                               TaskStatus taskStatus) {
+        return new Task(taskId, taskName, taskType, originalTaskUri, taskStatus);
+    }
+
+
     @Value
     public static class TaskId {
         String value;

tapas-tasks/src/main/resources/application.properties

@@ -1,2 +1,7 @@
 server.port=8081
+//spring.data.mongodb.uri=mongodb://127.0.0.1:27017
+spring.data.mongodb.uri=mongodb://root:8nP7s0a@mongodb:27017/
+spring.data.mongodb.database=tapas-tasks
 baseuri=https://tapas-tasks.86-119-34-23.nip.io/
+
+