Index

Websocket hello world

Main

package client;

import java.net.URI;
import java.util.concurrent.TimeUnit;

import org.eclipse.jetty.websocket.client.ClientUpgradeRequest;
import org.eclipse.jetty.websocket.client.WebSocketClient;

public class Client {

    public static void main(String[] args) {
        String destUri = "ws://localhost:8080/sock";
        if (args.length > 0) {
            destUri = args[0];
        }
        WebSocketClient client = new WebSocketClient();
        SimpleEchoSocket socket = new SimpleEchoSocket();
        try {
            client.start();
            URI echoUri = new URI(destUri);
            ClientUpgradeRequest request = new ClientUpgradeRequest();
            client.connect(socket, echoUri, request);
            System.out.printf("Connecting to : %s%n", echoUri);
            socket.awaitClose(1, TimeUnit.SECONDS);
        } catch (Throwable t) {
            t.printStackTrace();
        } finally {
            try {
                client.stop();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        System.out.println("# exit #");
    }
}

Socket

package client;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.StatusCode;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketClose;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketConnect;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketMessage;
import org.eclipse.jetty.websocket.api.annotations.WebSocket;

/**
 * Basic Echo Client Socket
 */
@WebSocket(maxTextMessageSize = 64 * 1024)
public class SimpleEchoSocket {

    private final CountDownLatch closeLatch;

    @SuppressWarnings("unused")
    private Session session;

    public SimpleEchoSocket() {
        this.closeLatch = new CountDownLatch(1);
    }

    public boolean awaitClose(int duration, TimeUnit unit) throws InterruptedException {
        System.out.println("Waiting for close");
        return this.closeLatch.await(duration, unit);
    }

    @OnWebSocketClose
    public void onClose(int statusCode, String reason) {
        System.out.printf("Connection closed: %d - %s%n", statusCode, reason);
        this.session = null;
        this.closeLatch.countDown();
    }

    @OnWebSocketConnect
    public void onConnect(Session session) {
        System.out.printf("Got connect: %s%n", session);
        this.session = session;
        try {
            Future<Void> fut;
            fut = session.getRemote().sendStringByFuture("Hello");
            fut.get(2, TimeUnit.SECONDS);
            fut = session.getRemote().sendStringByFuture("Thanks for the conversation.");
            fut.get(2, TimeUnit.SECONDS);
            session.close(StatusCode.NORMAL, "I'm done");
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    @OnWebSocketMessage
    public void onMessage(String msg) {
        System.out.printf("Got msg: %s%n", msg);
    }
}