/*
* Copyright (c) 2008-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.cometd.client;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
import org.cometd.bayeux.Channel;
import org.cometd.bayeux.Message;
import org.cometd.bayeux.client.ClientSessionChannel;
import org.cometd.bayeux.server.BayeuxServer;
import org.cometd.bayeux.server.ServerMessage;
import org.cometd.bayeux.server.ServerSession;
import org.cometd.client.transport.ClientTransport;
import org.cometd.client.transport.LongPollingTransport;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertTrue;
public class MaxNetworkDelayTest extends ClientServerTest
{
private final long timeout = 5000;
@Before
public void setUp() throws Exception
{
Map<String, String> params = new HashMap<>();
params.put("timeout", String.valueOf(timeout));
startServer(params);
}
@Test
public void testMaxNetworkDelayOnHandshake() throws Exception
{
final long maxNetworkDelay = 2000;
final long sleep = maxNetworkDelay + maxNetworkDelay / 2;
bayeux.addExtension(new BayeuxServer.Extension.Adapter()
{
@Override
public boolean sendMeta(ServerSession to, ServerMessage.Mutable message)
{
if (Channel.META_HANDSHAKE.equals(message.getChannel()))
{
try
{
Thread.sleep(sleep);
// If we are able to sleep the whole time, the test will fail
}
catch (InterruptedException x)
{
Thread.currentThread().interrupt();
// This exception is expected, do nothing
}
}
return true;
}
});
final CountDownLatch latch = new CountDownLatch(2);
ClientTransport transport = new LongPollingTransport(null, httpClient);
transport.setOption(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay);
BayeuxClient client = new BayeuxClient(cometdURL, transport)
{
@Override
public void onFailure(Throwable failure, List<? extends Message> messages)
{
if (failure instanceof TimeoutException)
latch.countDown();
}
};
client.getChannel(Channel.META_HANDSHAKE).addListener(new ClientSessionChannel.MessageListener()
{
public void onMessage(ClientSessionChannel channel, Message message)
{
if (!message.isSuccessful())
latch.countDown();
}
});
client.handshake();
assertTrue(latch.await(sleep, TimeUnit.MILLISECONDS));
disconnectBayeuxClient(client);
}
@Test
public void testMaxNetworkDelayOnConnect() throws Exception
{
final long maxNetworkDelay = 2000;
final long sleep = maxNetworkDelay + maxNetworkDelay / 2;
bayeux.addExtension(new BayeuxServer.Extension.Adapter()
{
private AtomicInteger connects = new AtomicInteger();
@Override
public boolean sendMeta(ServerSession to, ServerMessage.Mutable message)
{
if (Channel.META_CONNECT.equals(message.getChannel()))
{
int c = connects.incrementAndGet();
if (c == 2)
{
try
{
Thread.sleep(sleep);
// If we are able to sleep the whole time, the test will fail
}
catch (InterruptedException x)
{
Thread.currentThread().interrupt();
// This exception is expected, do nothing
}
}
}
return true;
}
});
final CountDownLatch latch = new CountDownLatch(3);
ClientTransport transport = new LongPollingTransport(null, httpClient);
transport.setOption(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay);
BayeuxClient client = new BayeuxClient(cometdURL, transport)
{
@Override
public void onFailure(Throwable failure, List<? extends Message> messages)
{
if (failure instanceof TimeoutException)
latch.countDown();
}
};
client.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener()
{
private AtomicInteger connects = new AtomicInteger();
public void onMessage(ClientSessionChannel channel, Message message)
{
int c = connects.incrementAndGet();
if (c == 1 && message.isSuccessful())
latch.countDown();
else if (c == 2 && !message.isSuccessful())
latch.countDown();
}
});
client.handshake();
long begin = System.nanoTime();
assertTrue(latch.await(timeout + sleep, TimeUnit.MILLISECONDS));
long end = System.nanoTime();
assertTrue(end - begin > TimeUnit.MILLISECONDS.toNanos(timeout));
disconnectBayeuxClient(client);
}
@Test
public void testDynamicMaxNetworkDelay() throws Exception
{
final long maxNetworkDelay1 = 2000;
final long maxNetworkDelay2 = 4000;
final long sleep = (maxNetworkDelay1 + maxNetworkDelay2) / 2;
bayeux.addExtension(new BayeuxServer.Extension.Adapter()
{
@Override
public boolean rcvMeta(ServerSession from, ServerMessage.Mutable message)
{
if (Channel.META_CONNECT.equals(message.getChannel()))
{
try
{
Thread.sleep(sleep);
}
catch (InterruptedException x)
{
// Ignore
}
}
return true;
}
});
final CountDownLatch latch = new CountDownLatch(3);
LongPollingTransport transport = new LongPollingTransport(null, httpClient);
transport.setOption(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay1);
final BayeuxClient client = new BayeuxClient(cometdURL, transport)
{
@Override
public void onFailure(Throwable failure, List<? extends Message> messages)
{
if (failure instanceof TimeoutException)
latch.countDown();
}
};
client.getChannel(Channel.META_CONNECT).addListener(new ClientSessionChannel.MessageListener()
{
private AtomicInteger connects = new AtomicInteger();
public void onMessage(ClientSessionChannel channel, Message message)
{
int c = connects.incrementAndGet();
if (c == 1 && !message.isSuccessful())
{
latch.countDown();
// Change dynamically the max network delay.
client.setOption(ClientTransport.MAX_NETWORK_DELAY_OPTION, maxNetworkDelay2);
}
else if (c == 2 && message.isSuccessful())
{
latch.countDown();
}
}
});
client.handshake();
assertTrue(latch.await(3 * sleep, TimeUnit.MILLISECONDS));
disconnectBayeuxClient(client);
}
}