Please consider add sample configuration for java remote debug

[huangfeiyu]

Hi, thank you for your great work first!
I have had a hard time to get java remote debug work with dape, after consult the issues, finally I got a working config. My configuration is:

(add-to-list 'dape-configs
               `(java-attach
                 modes (java-mode java-ts-mode)
                 fn (lambda (config)
                      (with-current-buffer
                          (find-file-noselect (expand-file-name (plist-get config :program)
                                                                (project-root (project-current))))
                          (thread-first
                            config
                            (plist-put 'hostname "localhost")
                            (plist-put 'port (eglot-execute-command (eglot-current-server)
                                                                    "vscode.java.startDebugSession" nil))
                            (plist-put :projectName (project-name (project-current))))))
                 :program dape-buffer-default
                 :type "java"
                 :request "attach"
                 :hostName "localhost"
                 :port 11550))

I hope this can help others.

[lewalkingdad]

Here is my config to debug an application running in a docker container:

(add-to-list
   'dape-configs
   `(java-debug
     modes (java-mode java-ts-mode)
     hostname "localhost"
     port (lambda () (eglot-execute-command (eglot-current-server) "vscode.java.startDebugSession" nil))
   :workspaceFolder "/path/to/project/src" ;; Needed for the REPL to be able to evaluate properly
     :request "attach"
:projectName "your-project-name" ;; Needed for the REPL to be able to evaluate properly
     :hostname "0.0.0.0" ;; or any domain name resolving locally.
     :port 9009 ;; the port number has to match the port number specified in the `dt_socket=` settings.
     :type "java"))

[zhangxingong]

Hi, thank you for your great work first! I have had a hard time to get java remote debug work with dape, after consult the issues, finally I got a working config. My configuration is:

(add-to-list 'dape-configs
               `(java-attach
                 modes (java-mode java-ts-mode)
                 fn (lambda (config)
                      (with-current-buffer
                          (find-file-noselect (expand-file-name (plist-get config :program)
                                                                (project-root (project-current))))
                          (thread-first
                            config
                            (plist-put 'hostname "localhost")
                            (plist-put 'port (eglot-execute-command (eglot-current-server)
                                                                    "vscode.java.startDebugSession" nil))
                            (plist-put :projectName (project-name (project-current))))))
                 :program dape-buffer-default
                 :type "java"
                 :request "attach"
                 :hostName "localhost"
                 :port 11550))

I hope this can help others.

Is this configuration suitable for debugging applications on the local Tomcat? I tried changing the port to the JDWP port of Tomcat, but it didn't hit.

[huangfeiyu]

Hi @zhangxingong
Yes, tomcat in my local machine. Here's how I start my tomcat in debug mode (I use linux):

export JPDA_ADDRESS=11550
export JPDA_TRANSPORT=dt_socket
/home/huang/apache-tomcat-10.1.42/bin/catalina.sh jpda start

I just saw your comment.