Debug Java Web Applications

[AlexMAS]

Hello!

I suppose my question can be quite stupid because I have not enough experience with Java. But anyway. Is there possible to debug Java Web Applications? For example, I have an application which can be hosted on Apache Tomcat and I would like to debug it in VSCode using your extension, like I can debug it in Eclipse or IntelliJ IDEA using an appropriate debug configuration.

[andxu]

Currently, the launch mode cannot support launch web app in web container, but the attach mode should support debug servlet (jsp is not supported) , but we have not tested it yet, I will keep this issue open as the task from supporting web containers, please keep eyes on this issue for updates.

[fbricon]

Alexander Mezhov (@AlexMAS) take a look at this article. Even if you don't use JRebel, you'll see how to attach the debugger to a remote tomcat process.

[AlexMAS]

Fred Bricon (@fbricon) thank you, it works fine!

I have a Gradle project, so I imported the gretty plugin as described comprehensively in this article and configured an appropriate task to run the project:

{
    "taskName": "Run Debug",
    "type": "shell",
    "command": "gradlew appRunDebug",
    "group": "build",
    "problemMatcher": []
}

You also have to configure debug options like next:

allprojects {

    apply plugin: 'org.akhikhl.gretty'

    gretty {

        // Hosting
        servletContainer = 'tomcat8'
        host = 'localhost'
        httpPort = 8080

        // Debug
        debugPort = 5005
        debugSuspend = true
    }
}

And finally the launch configuration:

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Debug (Attach)",
            "request": "attach",
            "hostName": "localhost",
            "port": 5005
        }
    ]
}

[andxu]

Please take a look at this plugin, we will prepare the tutorials for debug java web apps(jsp is not supported by now) .

[cvaliere]

hi Andy Xu(devdiv) (@andxu) i too have trouble figuring out how to do it
any news on the tutorial?

cheers