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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.server.examples.echo;
import java.nio.ByteBuffer;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.annotations.WebSocket;
@WebSocket
public class EchoBroadcastPingSocket extends EchoBroadcastSocket
{
private static class KeepAlive extends Thread
{
private CountDownLatch latch;
private Session session;
public KeepAlive(Session session)
{
this.session = session;
}
@Override
public void run()
{
try
{
while (!latch.await(10,TimeUnit.SECONDS))
{
System.err.println("Ping");
ByteBuffer data = ByteBuffer.allocate(3);
data.put(new byte[]
{ (byte)1, (byte)2, (byte)3 });
data.flip();
session.getRemote().sendPing(data);
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void shutdown()
{
if (latch != null)
{
latch.countDown();
}
}
@Override
public synchronized void start()
{
latch = new CountDownLatch(1);
super.start();
}
}
private KeepAlive keepAlive; // A dedicated thread is not a good way to do this
public EchoBroadcastPingSocket()
{
}
@Override
public void onClose(int statusCode, String reason)
{
keepAlive.shutdown();
super.onClose(statusCode,reason);
}
@Override
public void onOpen(Session session)
{
if (keepAlive == null)
{
keepAlive = new KeepAlive(session);
}
keepAlive.start();
super.onOpen(session);
}
}
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