language-server-template-java

template to get started writing a Language Server in Java.

It provides opinionated way to:

• default to Standard I/O communication
• have a WebScoket connection using --websocket option using Tyrus, the reference implementation.
• bundle as a fat jar (using SpringBoot)
• register opened files
• use Full sync mode for easier start (impact performance on big files)

Where to start

• Check Initialization parameters com.github.mylanguageserver.MyLanguageServer.createServerCapabilities()
• Check current completion provided com.github.mylanguageserver.MyTextDocumentService.completion(CompletionParams)
• Read LSP4J documentation
• Watch recording of Language Server for Apache Camel: Java/Eclipse plugin developer perspective | EclipseCon Europe 2018

How to test it

• From Eclipse Desktop IDE, for Standard I/O connection:
  • Ensure LSP4E is installed
  • Start the launch configuration "Java Template Standard IO"
  • in Preferences -> Languages Servers, add an association for the interested filetype and the launch configuration
  • open the file
• For WebSocket Connection:
  • Start the launch configuration "Java Template Websocket"
  • Follow instructions on https://github.com/apupier/language-client-template-codemirror