Support hot class reloading

[fbricon]

While debugging, making a non breaking change to a source file (i.e don't change method signature, add new method...) should make the debugger restart the current method call, without breaking the debugging session (same as in Eclipse).

[yaohaizh]

@fbricon This is on our road map and will one of the top features that we would like to implement.

[yaohaizh]

Work items necessary for this issue to be completed:

• Hook up with the current build cycle and debug adapter to trigger the hot code replacement
• Redefine classes for changed resources (Mainly, changed class files)
• Restore the affected breakpoints
• Restore the affected stack frames
• Error handling
• Java 9
• Remote/Container scenario support

[mojo2012]

You should try DCEVM - it allows you to change nearly everything (even introduce new classes) during runtime.
It works independent of the used IDE. You just have to start the JVM with special arugments.

[yaohaizh]

@mojo2012, If you use the DCEVM for the running JVM, the vscode java HCR will support those scenarios. The HCR will try the underlying behavior of the JVM.

[yaohaizh]

Close this as the main is completed. Other features will be tracked in logged issues.