Pairing monaco-editor with JDTLS using monaco-languageclient

[zeekliviu]

Hello, and thanks for stopping by here!

I have been trying to pair those two components for days and failed. My use case is that I need to render the monaco-editor in a React component for solving Java problems for the e-learning platform I am trying to build for my bachelor thesis. I need to pair monaco with JDTLS to have the features that VS Code has (i.e. informative tooltips, autocomplete, autoimport, etc.) because those are helpful for beginners.

I have already built a server for the RESTful API and tried to bundle it with the ws as seen in the example.

I have followed the example on Groovy from here and made a minimal reproducible project. The command to start both the front and back end is npm run dev.

The error I am facing is that the editor seems to not be configured correctly and I honestly do not know what to do next.

What am I missing?

Thanks for any help! 🙏🏻

[kaisalmen]

Hi @zeekliviu thank you for the reproducible example. I will look into this likely tomorrow and provide feedback.

[kaisalmen]

@zeekliviu I have created a working version on this branch: https://github.com/TypeFox/monaco-languageclient/tree/jdtls

More details later, especially what were the obstacles to make it work properly

[zeekliviu]

Thank you, sir! 🙏🏻

I will patiently wait for you to describe the adventure of getting it working properly. I bet it's a one of a kind story!

[kaisalmen]

@zeekliviu see PR #708

[kaisalmen]

@zeekliviu from the PR description "JDT LS requires that the files physically exist at the specified location. An openTextDocument is not sufficient. This works flawlessly with other language servers"
This was the main obstacle. The container ensure the server starts properly on all platforms with everything a the correct location.

[zeekliviu]

@kaisalmen all right; so from my use case, there will be a need to modify the starting code file inside the container before a client connects to always reflect the boilerplate code for each problem. I can not really start a container for each individual as that would kill my low spec server. Maybe there is a solution with different workspaces? I'll look into it.

I want to thank you and to all of the team for the effort you put into this project!

If there is something I can do in return, let me know!