java - WebSockets，TyrusServer 的 DeploymentException

Question

set 26, 2014 5:13:00 PM org.glassfish.tyrus.core.AnnotatedEndpoint callMethod
INFO: Exception thrown from onError method public void main.scala.SocksEndpoint2.onError(javax.websocket.Session,java.lang.Throwable).
javax.websocket.DeploymentException: Component provider threw exception when providing instance of class main.scala.SocksEndpoint2.

什么会导致这种情况？我正在使用一个几乎完全空的端点：

@ServerEndpoint("/websocks")
class SocksEndpoint2(system: ActorSystem) {

  @OnMessage
  def onMessage(mess: String, session: Session) {

  }
  @OnClose
  def onClose(session: Session) {

  }

  @OnError
  def onError(session: Session , t: Throwable) {

  }
}

并通过 javascript 发送

var exampleSocket = new WebSocket("ws://localhost:8025/websocks")
exampleSocket.send("{}")

它返回上面的错误。

Answer 1

端点类必须是公共的；

您显然对类的实例化有SocksEndpoint2疑问。它必须是公共的，并且必须具有零参数的构造函数 - 才能执行类似Class.forName(...).newInstance().