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Xtext LSP, Client with separate server process [message #1840560]

Mon, 19 April 2021 11:37

Neeraj Bhusare

Messages: 177
Registered: July 2009
Location: Canada

Senior Member

Hi,

I am not able to get the very basic Xtext LSP example to work. I see two problems - 1) Content assist not showing the keyword proposal, and 2) Validation not working.

I am running the server as a separate process. The links to the project [0], RunWebSocketServer [1], and the VS Code [3] extension are provided below.

[0] https://github.com/nbhusare/Xbase-sandbox/tree/master/lsp
[1] https://github.com/nbhusare/Xbase-sandbox/blob/master/lsp/org.xtext.example.mydsl.ide/bin/main/org/xtext/example/mydsl/ide/RunWebSocketServer.xtend
[2] https://github.com/nbhusare/Xbase-sandbox/tree/master/lsp/vscode-ext/hellolsp

I have compared my code with the xtext-example-project and other xtext-LSP projects on Github. I have also searched through the Xtext forum in the hope to get some hints, but so far I haven't had much luck.

Kindly help.

Twitter : @NeerajBhusare
Blog : https://nbhusare.github.io/
Best regards, Neeraj

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Re: Xtext LSP, Client with separate server process [message #1840562 is a reply to message #1840560]

Mon, 19 April 2021 11:46

Christian Dietrich

Messages: 14111
Registered: July 2009

Senior Member

Hi, i recommend you to remote debug for errors.
it also websocket is not for vscode. (you use normal socket in vscode)
see https://github.com/itemis/xtext-languageserver-example/blob/cd_226wip/org.xtext.example.mydsl.ide/src/org/xtext/example/mydsl/ide/RunServer.java

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

[Updated on: Mon, 19 April 2021 11:49]

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Re: Xtext LSP, Client with separate server process [message #1840563 is a reply to message #1840562]

Mon, 19 April 2021 11:55

Christian Dietrich

Messages: 14111
Registered: July 2009

Senior Member

please make also sure you use match lsp4j/xtext and vscode api versions

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Xtext LSP, Client with separate server process [message #1840567 is a reply to message #1840563]

Mon, 19 April 2021 12:38

Neeraj Bhusare

Messages: 177
Registered: July 2009
Location: Canada

Senior Member

Christian, thanks for the hints. I'll look into it. Tx.

Twitter : @NeerajBhusare
Blog : https://nbhusare.github.io/
Best regards, Neeraj

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Re: Xtext LSP, Client with separate server process [message #1840590 is a reply to message #1840567]

Tue, 20 April 2021 06:34

Neeraj Bhusare

Messages: 177
Registered: July 2009
Location: Canada

Senior Member

Thanks, Christian for your help.

I am using VS Code version 1.55.0, which uses the 3.16 version of the LSP. In order to make the example work, I needed LSP4j version 0.12.0. Upgrading to Xtext 2.26.0-SNAPSHOT, and vscode-languageclient version to 7.0.0 fixed the issue.

Twitter : @NeerajBhusare
Blog : https://nbhusare.github.io/
Best regards, Neeraj

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