/*
* 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.server;
import java.util.concurrent.TimeUnit;
import org.cometd.bayeux.server.LocalSession;
import org.cometd.bayeux.server.ServerTransport;
import org.junit.Assert;
import org.junit.Test;
public class SweepTest
{
@Test
public void testChannelsSweepPerformance()
{
BayeuxServerImpl bayeuxServer = new BayeuxServerImpl();
StringBuilder builder = new StringBuilder();
int count = 5000;
int children = 5;
for (int i = 0; i < count; ++i)
{
builder.setLength(0);
for (int j = 0; j < children; ++j)
{
char letter = (char)('a' + j);
String name = builder.append("/").append(letter).append(i).toString();
bayeuxServer.createChannelIfAbsent(name);
}
}
long start = System.nanoTime();
bayeuxServer.sweep();
long end = System.nanoTime();
long elapsedMicros = TimeUnit.NANOSECONDS.toMicros(end - start);
int microsPerSweepPerChannel = 100;
final int expectedMicros = count * children * microsPerSweepPerChannel;
Assert.assertTrue("elapsed micros " + elapsedMicros + ", expecting < " + expectedMicros, elapsedMicros < expectedMicros);
}
@Test
public void testChannelsAreSwept()
{
BayeuxServerImpl bayeuxServer = new BayeuxServerImpl();
StringBuilder builder = new StringBuilder();
int count = 100;
int children = 5;
for (int i = 0; i < count; ++i)
{
builder.setLength(0);
for (int j = 0; j < children; ++j)
{
char letter = (char)('a' + j);
String name = builder.append("/").append(letter).append(i).toString();
bayeuxServer.createChannelIfAbsent(name);
}
}
int sweepPasses = 3;
int maxIterations = sweepPasses * children * 2;
int iterations = 0;
while (bayeuxServer.getChannels().size() > 0)
{
bayeuxServer.sweep();
++iterations;
if (iterations > maxIterations)
break;
}
Assert.assertEquals(0, bayeuxServer.getChannels().size());
}
@Test
public void testSessionsSweepPerformance()
{
BayeuxServerImpl bayeuxServer = new BayeuxServerImpl();
int count = 25000;
for (int i = 0; i < count; ++i)
{
bayeuxServer.addServerSession(bayeuxServer.newServerSession(), bayeuxServer.newMessage());
}
long start = System.nanoTime();
bayeuxServer.sweep();
long end = System.nanoTime();
long elapsedMicros = TimeUnit.NANOSECONDS.toMicros(end - start);
int microsPerSweepPerChannel = 100;
final int expectedMicros = count * microsPerSweepPerChannel;
Assert.assertTrue("elapsed micros " + elapsedMicros + ", expecting < " + expectedMicros, elapsedMicros < expectedMicros);
}
@Test
public void testLocalSessionIsNotSwept() throws Exception
{
BayeuxServerImpl bayeuxServer = new BayeuxServerImpl();
bayeuxServer.setOption("sweepIntervalMs", -1);
long maxInterval = 1000;
bayeuxServer.setOption("maxInterval", maxInterval);
bayeuxServer.setOption("maxServerInterval", maxInterval);
bayeuxServer.start();
ServerTransport serverTransport = bayeuxServer.getTransport("long-polling");
bayeuxServer.setCurrentTransport((AbstractServerTransport)serverTransport);
// LocalSessions do not perform heartbeat so we should not sweep them until disconnected
LocalSession localSession = bayeuxServer.newLocalSession("test_sweep");
localSession.handshake();
bayeuxServer.sweep();
Assert.assertNotNull(bayeuxServer.getSession(localSession.getId()));
Thread.sleep(maxInterval * 2);
bayeuxServer.sweep();
Assert.assertNotNull(bayeuxServer.getSession(localSession.getId()));
localSession.disconnect();
}
}