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//
// ========================================================================
// Copyright (c) 1995-2013 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.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.eclipse.jetty.util.thread.Scheduler;
import org.eclipse.jetty.util.thread.TimerScheduler;
import org.junit.After;
import org.junit.Assert;
import org.junit.Test;
public class SelectChannelEndPointInterestsTest
{
private QueuedThreadPool threadPool;
private Scheduler scheduler;
private ServerSocketChannel connector;
private SelectorManager selectorManager;
public void init(final Interested interested) throws Exception
{
threadPool = new QueuedThreadPool();
threadPool.start();
scheduler = new TimerScheduler();
scheduler.start();
connector = ServerSocketChannel.open();
connector.bind(new InetSocketAddress("localhost", 0));
selectorManager = new SelectorManager(threadPool, scheduler)
{
@Override
protected EndPoint newEndPoint(SocketChannel channel, ManagedSelector selector, SelectionKey selectionKey) throws IOException
{
return new SelectChannelEndPoint(channel, selector, selectionKey, getScheduler(), 60000)
{
@Override
protected void onIncompleteFlush()
{
super.onIncompleteFlush();
interested.onIncompleteFlush();
}
};
}
@Override
public Connection newConnection(SocketChannel channel, final EndPoint endPoint, Object attachment)
{
return new AbstractConnection(endPoint, getExecutor())
{
@Override
public void onOpen()
{
super.onOpen();
fillInterested();
}
@Override
public void onFillable()
{
interested.onFillable(endPoint, this);
}
};
}
};
selectorManager.start();
}
@After
public void destroy() throws Exception
{
if (scheduler!=null)
scheduler.stop();
if (selectorManager != null)
selectorManager.stop();
if (connector != null)
connector.close();
if (threadPool != null)
threadPool.stop();
}
@Test
public void testReadBlockedThenWriteBlockedThenReadableThenWritable() throws Exception
{
final AtomicInteger size = new AtomicInteger(1024 * 1024);
final AtomicReference<Exception> failure = new AtomicReference<>();
final CountDownLatch latch1 = new CountDownLatch(1);
final CountDownLatch latch2 = new CountDownLatch(1);
final AtomicBoolean writeBlocked = new AtomicBoolean();
init(new Interested()
{
@Override
public void onFillable(EndPoint endPoint, AbstractConnection connection)
{
ByteBuffer input = BufferUtil.allocate(2);
int read = fill(endPoint, input);
if (read == 1)
{
byte b = input.get();
if (b == 1)
{
connection.fillInterested();
ByteBuffer output = ByteBuffer.allocate(size.get());
endPoint.write(new Callback.Adapter(), output);
latch1.countDown();
}
else
{
latch2.countDown();
}
}
else
{
failure.set(new Exception("Unexpectedly read " + read + " bytes"));
}
}
@Override
public void onIncompleteFlush()
{
writeBlocked.set(true);
}
private int fill(EndPoint endPoint, ByteBuffer buffer)
{
try
{
return endPoint.fill(buffer);
}
catch (IOException x)
{
failure.set(x);
return 0;
}
}
});
Socket client = new Socket();
client.connect(connector.getLocalAddress());
client.setSoTimeout(5000);
SocketChannel server = connector.accept();
server.configureBlocking(false);
selectorManager.accept(server);
OutputStream clientOutput = client.getOutputStream();
clientOutput.write(1);
clientOutput.flush();
Assert.assertTrue(latch1.await(5, TimeUnit.SECONDS));
// We do not read to keep the socket write blocked
clientOutput.write(2);
clientOutput.flush();
Assert.assertTrue(latch2.await(5, TimeUnit.SECONDS));
// Sleep before reading to allow waking up the server only for read
Thread.sleep(1000);
// Now read what was written, waking up the server for write
InputStream clientInput = client.getInputStream();
while (size.getAndDecrement() > 0)
clientInput.read();
client.close();
Assert.assertNull(failure.get());
}
private interface Interested
{
void onFillable(EndPoint endPoint, AbstractConnection connection);
void onIncompleteFlush();
}
}
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