自定义语言Xtext LanguageServer

Question

我想做一个运行在IntelliJ Idea插件上的语言服务器的简单例子。

我从Eclipse中的一个简单的Xtext项目开始。我没做什么特别的事。刚刚创建了一个新的Xtext项目，并使用gradle构建它。由于某种原因，我的新语言没有注册为一种语言，服务器对此抱怨不已。

当我启动服务器并发送请求时，我收到以下消息：

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

我试图搜索这个文件/META-INF/services/org.eclipse.xtext.ISetup，但它不存在于项目或构建的工件中。

有人知道如何注册这门语言吗？

Answer 1

这实际上是Eclipse的问题-它看不到这些文件。我在总司令部找到了他们。然后在重新安装和刷新之后，一切都很好。