Add suspend mode for source breakpoints

[Thomas Mäder (tsmaeder)]

Fixes#608

Note that this PR contains code for handling source breakpoints and exception breakpoints. But in fact, VS Code Java only properly handles source and instruction breakpoints. I've left the code in there, since it's not completely trivial and it should not affect the behavior if no suspend mode is sent when setting the exception breakpoints.

How to Test

1. Set a breakpoint in a Java Program
2. Start Debugging
3. You now should be able to chose the suspend mode (thread or VM) in the breakpoints view and when editing the breakpoint condition.
4. Make sure the breakpoint can suspend either all threads or only one thread depending on the mode
5. Put your breakpoint in a for loop and when the breakpoint is hit, switch to the other suspend mode
6. Resume the program (may need "resume all" from the context menu) and ensure the new suspend mode is honored the next time you hit the breakpoint.
7. Make sure exception breakpoints behave as usual. There should be no UI to set the mode and exceptions should only suspend the thread the occur on.

[Changyong Gong (chagong)]

Thomas Mäder (@tsmaeder) I wrote a simple program to test it, but got error:

publicclassHelloWorld {
publicstaticvoidmain(String[] args) {
System.out.println("Starting application...");
Stringmessage = "Hello, World!";
System.out.println(message); // Set a breakpoint herefor (inti = 0; i < 3; i++) {
System.out.println("Count: " + i);
}
System.out.println("Application finished.");
}
}

Error:
No delegateCommandHandler for vscode.java.resolveMainMethod

Also please fix CI errors.

[Thomas Mäder (tsmaeder)]

Changyong Gong (@chagong) how are you testing? I have a very similar program which works fine for me. Also, this PR does not contain changes that could cause a problem with the delegate command handler, IMO. Here's what I do:

1. build a new jar with mvnw clean install
2. copy the resulting jar to ..\vscode-java-debug\server
3. Run the vscode-java-debug plugin from source
4. Works fine for me 🤷

[Changyong Gong (chagong)]

Thomas Mäder (@tsmaeder) probably the problem of my setup, it works after I relaunch vscode and F5. The PR is good to go after your fix the format errors.

[Thomas Mäder (tsmaeder)]

Changyong Gong (@chagong) running checkstyle:check locally spews out messages about <cr><lf> not being allowed for every file. However, that line ending is just an artifact of checking out the repo on Windows.

[Thomas Mäder (tsmaeder)]

Changyong Gong (@chagong) is there anything (beyond a rebase) that I could do to move this forward?

[Changyong Gong (chagong)]

Hi Thomas Mäder (@tsmaeder), can you check if the fix to microsoft/vscode-java-debug#722 has already supported the suspend policy setting?

[Thomas Mäder (tsmaeder)]

Changyong Gong (@chagong) no, this PR allows to set the suspend mode per breakpoint, the other PR just introduces a global flag.

[Changyong Gong (chagong)]

Thomas Mäder (@tsmaeder) we make it a global flag because vscode doesn't have UI option to set breakpoint property. Are you doing this for cursor?

[Thomas Mäder (tsmaeder)]

Thomas Mäder (@tsmaeder) we make it a global flag because vscode doesn't have UI option to set breakpoint property. Are you doing this for cursor?

Chagon VS Code does have UI for this, but you have to enable the modes in the debug adapter (what this PR does) in order to see it. See description.