自定义语言Xtext LanguageServer

如何解决自定义语言Xtext LanguageServer

我想举一个使用IntelliJ Idea插件运行语言服务器的简单示例。

我从Eclipse开始了一个简单的Xtext项目。我没什么特别的。刚刚创建了一个新的Xtext项目并使用gradle进行了构建。由于某种原因，我的新语言未注册为一种语言，服务器对此有所抱怨。

启动服务器并发送请求时，我会收到以下消息：

Aug 29,2020 7:48:50 PM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError
SEVERE: Internal error: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:67)
    at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)
    at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)
    at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)
    at org.eclipse.lsp4j.jsonrpc.validation.ReflectiveMessageValidator.consume(ReflectiveMessageValidator.java:68)
    at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
    at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
    at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:65)
    ... 12 more
Caused by: java.lang.IllegalStateException: No Xtext languages have been registered. Please make sure you have added the languages's setup class in '/meta-inf/services/org.eclipse.xtext.ISetup'
    at org.eclipse.xtext.ide.server.LanguageServerImpl.initialize(LanguageServerImpl.java:211)
    ... 17 more

我尝试搜索此文件/meta-inf/services/org.eclipse.xtext.ISetup，但是在项目或构建的工件中不存在该文件。

有人知道如何注册语言吗？

解决方法

这实际上是Eclipse的问题-它没有看到那些文件。我能够在总指挥官中找到他们。然后重新安装并刷新后，一切都很好。