Run and debug a Spring Boot application using Docker Compose

The source code of the application is hosted on GitHub at https://github.com/IdeaUJetBrains/SpringBootDockerDemoDebug

1. From the main menu, select VCS | Get from Version Control

2. Specify the URL of the repository and click Clone.

3. Agree to open the cloned project in a new window.

1. Open the docker-compose-debug.yml file.

2. Click in the gutter.

   This creates a Docker Compose run configuration, which starts the application in a container as the app service and the database in another container as the db service. If successful, you should see something similar to the following in the deploy log:

   Creating db ... Creating springbootdockerdemodebug_app_1 ... 'Compose: docker-compose-debug.yml' has been deployed successfully.

   You can access the application at http://localhost:18080. For example, you can try to execute the following GET request, which should add a new entitybus entry to the database and list all available entries: http://127.0.0.1:18080/entitybus/post.

   You can connect to the database at jdbc:mysql://0.0.0.0:13306/DOCKERDB. Use the Database tool window to add the database as a data source and check the entitybus table. Use the following connection settings:

   • Host: 0.0.0.0 or localhost

   • Port: 13306

   • User: root

   • Password: root

   • Database: DOCKERDB

1. Open the docker-compose-debug.yml file.

2. Click in the gutter.

3. Select the module in the Use module classpath list.

4. Double-click the Docker Compose run configuration in the Before launch list. If it is not in the list, click and select Launch Docker before debug.

5. Make sure that the Docker Compose run configuration is selected with the app service. Also check the Custom Command field: it should contain the -agentlib option and options from the command field in the docker-compose-debug.yml file:

   java -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005 -Djava.security.egd=file:/dev/./urandom -jar /project/target/demo-0.0.1-SNAPSHOT.jar

If the application is already running, do not run the debug configuration. Apply the settings and click Cancel.

1. If the application is already running, stop it. To do it, select the Docker Compose node in the Services tool window and click in the toolbar. Alternatively, you can right-click and delete the containers under the corresponding services.

2. Open the docker-compose-debug.yml file.

3. Click in the gutter and start the debug configuration.

Once the application starts and the debugger attaches to it, the Debug tool window will open.

1. Open the src/main/java/entity/Entitybus.java file and set a breakpoint in the setEid() method.

   

2. Execute the following GET request: http://127.0.0.1:18080/entitybus/post

   The application will stop at the breakpoint and you can examine the current variable values and frames in the Debug tool window.

3. Click until it executes the request and you get the returned values.