Added xml.restart.language.server command for language server restart

[AlexXuChen]

Added xml.restart.language.server command to trigger language server restart.

Closes #539

Signed-off-by: Alexander Chen [email protected]

[AlexXuChen]

If someone else can quickly confirm for me, when running the command, the client command registration seems to re-trigger, which tells me that the language client is restarting. Can someone confirm this, or give me another check to see if the language client has restarted?

[GitMensch]

Thanks for the PR!

The best option to check this is to inspect the processes (top -u $(whoami) or Taskmanager/Sysinternals ProcessExplorer on win32). Before and after issuing the command.

[GitMensch]

Is there a reason that this is still on draft? The original implementation seemed fine and the linked issue is still open...

[AlexXuChen]

Using languageClient.restart() does the trick, however we need to use vscode-languageclient version ^8.0.0, which like @rgrunber mentioned isn't supported on Theia:

The error will be fixed, but the demo shows how XML Support is stopped, and starts again.

There is a work around: we can apply the same logic as restart(), as the need to update vscode-languageclient for the time being

[AlexXuChen]

Use

await languageClient.restart()

once we move to vscode-languageclient ^8.0.1

[rgrunber]

Change works very well for me.

I was considering just leaving the timeout even when run outside of debug mode, but given that restart() will have the timeout, we may as well run it that way.

[rgrunber]

@AlexXuChen , may be worth adding to https://github.com/redhat-developer/vscode-xml/blob/master/docs/Commands.md as well.