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WebSocketOpenClose.java - Session Open and Close
How to provide call back methods for session open and close events with WebSocket API?
✍: FYIcenter.com
Adding session open and close event call back methods can be done
with @OnOpen and @OnCLose annotated methods as shown below:
// Copyright (c) 2016 FYIcenter.com import java.net.URI; import javax.websocket.ClientEndpoint; import javax.websocket.OnMessage; import javax.websocket.ContainerProvider; import javax.websocket.Session; import javax.websocket.WebSocketContainer; import javax.websocket.*; @ClientEndpoint public class WebSocketOpenClose { public static void main(String[] args) throws Exception { WebSocketContainer c = ContainerProvider.getWebSocketContainer(); URI u = new URI("wss://echo.websocket.org"); Session s = c.connectToServer(WebSocketOpenClose.class, u); System.out.println("WebSocket session info:"); System.out.println(" Protocol version: "+s.getProtocolVersion()); System.out.println(" Request URI: "+s.getRequestURI()); RemoteEndpoint.Basic r = s.getBasicRemote(); r.sendText("Hello there!"); Thread.sleep(1000*2); s.close(); } @OnMessage public void OnMessage(String message) { System.out.println("-- Message received: "+message); } @OnOpen public void OnOpen(Session session) { System.out.println("-- Session started: "+session.getId()); } @OnClose public void OnClose(Session session, CloseReason reason) { System.out.println("-- Session closed: "+session.getId()+" - "+reason); } }
You can compile and run the above example in a command window with Java SE JDK 8 and the tyrus-standalone-client.jar from Java EE 7 SDK:
>\fyicenter\jdk-1.8.0\bin\javac -cp \fyicenter\glassfish4\mq\lib\tyrus-standalone-client.jar WebSocketOpenClose.java >\fyicenter\jdk-1.8.0\bin\java -cp .;\fyicenter\glassfish4\mq\lib\tyrus-standalone-client.jar WebSocketOpenClose -- Session started: fefe38df-30fe-40d3-a18a-2a1e4d5bbcfd WebSocket session info: Protocol version: 13 Request URI: wss://echo.websocket.org -- Message received: Hello there! -- Session closed: fefe38df-30fe-40d3-a18a-2a1e4d5bbcfd - CloseReason[1000]
⇐ WebSocketEchoClient.java - WebSocket Echo Client
2018-01-16, 1535👍, 0💬
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