How can I debug with the Cloud-SDK-based Maven App Engine plugin?

Question

I'd like to debug with the Cloud-SDK Based Maven plugin (com.google.cloud.tools::appengine-maven-plugin v. 1.3.0).

I run the goal appengine:run in Eclipse in Debug, but this does not put me into Debug mode, e.g. stopping on breakpoints.

I can use remote-debugger, but it is a hassle to run two processes every time I need to start my application. Is there a way of running a Debug session with one command?

Answer 1

I believe the only way to do this with Maven is by setting up a remote debug configuration in Eclipse as described in the App Engine documentation.

<configuration>
  <jvmFlags>
    <jvmFlag>-Xdebug</jvmFlag>
    <jvmFlag>-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005</jvmFlag>
  </jvmFlag>
</configuration>

Your eclipse remote debug configuration needs to use the port specified in the jvmFlag arguments.

Another more practical way to run the debugger is to use Google Cloud Tools for Eclipse.