Latest open-vsx Java plugins are not working in Theia

[BarryDrez]

I am using the following plugins for my theia extension:

  "theiaPlugins": {
    "vscode.markdown-language-features": "https://open-vsx.org/api/vscode/markdown-language-features/1.77.0/file/vscode.markdown-language-features-1.77.0.vsix",
    "vscode-builtin-extensions-pack": "https://open-vsx.org/api/eclipse-theia/builtin-extension-pack/1.77.0/file/eclipse-theia.builtin-extension-pack-1.77.0.vsix",
    "redhat.java": "https://open-vsx.org/api/redhat/java/1.20.2023060704/file/redhat.java-1.20.2023060704.vsix",
    "vscjava.vscode-java-dependency": "https://open-vsx.org/api/vscjava/vscode-java-dependency/0.23.0/file/vscjava.vscode-java-dependency-0.23.0.vsix"
  },

With this combination, the Java Projects view is not working. Any suggestions?

[vince-fugnitto]

@BarryDrez thank you for the discussion, are you experience the following error when opening the java projects view?

• java projects view remains empty, error popup appears microsoft/vscode-java-dependency#763

Java Projects: No delegateCommandHandler for java.project.checkImportStatus

If so, you may need to downgrade the version as it seems to be an issue with how the extension was published to open-vsx.

[marcdumais-work]

I will make a PR on Blueprint to pin the Java Project Manager extension to a slightly older version that's known to work.

[BarryDrez]

Hi @vince-fugnitto, @marcdumais-work, thank you for the update. I am opening a workspace that has a Java project, and in the Java Projects view, it says "To view the projects, you can import the projects into the workspace". When I try to run a class, I get the message: "Run/Debug feature requires Java language server to run in Standard mode. Do you want to switch it to Standard mode now?" If I select Yes, I get a message "For security concern, Java language server cannot be switched to Standard mode in untrusted workspaces.". When I click the Manage Workspace... button, nothing happens.

[marcdumais-work]

Hi @BarryDrez ,

Are you using one of the pre-built Blueprint package we produced or do you build from sources? Which operating system are you on? Electron version or browser?

[BarryDrez]

Hi @marcdumais-work I am building a Theia extension, and running it on Windows. I got your last build from today, and I am using Theia 1.38 along with the plugins:

    "vscode-builtin-extensions-pack": "https://open-vsx.org/api/eclipse-theia/builtin-extension-pack/1.77.0/file/eclipse-theia.builtin-extension-pack-1.77.0.vsix",
    "vscjava.vscode-java-pack": "https://open-vsx.org/api/vscjava/vscode-java-pack/0.25.11/file/vscjava.vscode-java-pack-0.25.11.vsix",
    "vscjava.vscode-java-dependency": "https://open-vsx.org/api/vscjava/vscode-java-dependency/0.21.2/file/vscjava.vscode-java-dependency-0.21.2.vsix"

[marcdumais-work]

@BarryDrez Ok, I think I understand what may be happening. There's a preference, related to the vscode Workspace Trust feature, with key "security.workspace.trust.enabled". Can you try to set it to false, thus disabling this feature that's not yet well supported in Theia? If you want to do that same thing programmatically, you can do it like so, in your app's package.json:

https://github.com/eclipse-theia/theia-blueprint/blob/master/applications/electron/package.json#L29

[marcdumais-work]

I saw this as well that maybe can help:

[BarryDrez]

Thank you @marcdumais-work ! Setting "security.workspace.trust.enabled" to false did the trick. I can now see my workspace in the Java Projects view. Can I set "java.server.launchMode": "Standard" in the .theia/settings file? Will that work?

[marcdumais-work]

@BarryDrez you're welcome. Yes, that should work. You should then see the setting reflected in the Settings UI, under that same key (workspace level):

.theia/settings.json:

{
    "java.compile.nullAnalysis.mode": "automatic",
    "java.server.launchMode": "Standard"
}

[marcdumais-work]

BTW, IIRC, there may be other edge cases that may result in the Java extension starting in "lightweight mode" (i.e. very low-features mode). I think e.g. if no JDK or JRE are found (when using the universal version of that extension). For more info, see the Extension's README

[BarryDrez]

Thanks again @marcdumais-work. This was very helpful.