//
// ========================================================================
// Copyright (c) 1995-2014 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.spdy.client;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.Executor;
import org.eclipse.jetty.io.AbstractConnection;
import org.eclipse.jetty.io.ByteBufferPool;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.io.RuntimeIOException;
import org.eclipse.jetty.spdy.Controller;
import org.eclipse.jetty.spdy.ISession;
import org.eclipse.jetty.spdy.IdleListener;
import org.eclipse.jetty.spdy.api.GoAwayInfo;
import org.eclipse.jetty.spdy.parser.Parser;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
public class SPDYConnection extends AbstractConnection implements Controller, IdleListener
{
private static final Logger LOG = Log.getLogger(SPDYConnection.class);
private final ByteBufferPool bufferPool;
private final Parser parser;
private final int bufferSize;
private volatile ISession session;
private volatile boolean idle = false;
public SPDYConnection(EndPoint endPoint, ByteBufferPool bufferPool, Parser parser, Executor executor, boolean dispatchIO)
{
this(endPoint, bufferPool, parser, executor, dispatchIO, 8192);
}
public SPDYConnection(EndPoint endPoint, ByteBufferPool bufferPool, Parser parser, Executor executor, boolean dispatchIO, int bufferSize)
{
// Since SPDY is multiplexed, onFillable() must never block while calling application code. In fact,
// the SPDY code always dispatches to a new thread when calling application code,
// so here we can safely pass false as last parameter, and avoid to dispatch to onFillable().
// The IO operation (read, parse, etc.) will not block and will be fast in almost all cases.
// Big uploads to a server, however, might occupy the Selector thread for a long time and
// therefore starve other connections, so by default dispatchIO is true.
super(endPoint, executor, dispatchIO);
this.bufferPool = bufferPool;
this.parser = parser;
onIdle(true);
this.bufferSize = bufferSize;
}
@Override
public void onOpen()
{
super.onOpen();
fillInterested();
}
@Override
public void onFillable()
{
ByteBuffer buffer = bufferPool.acquire(bufferSize, false);
boolean readMore = read(buffer) == 0;
bufferPool.release(buffer);
if (readMore)
fillInterested();
}
protected int read(ByteBuffer buffer)
{
EndPoint endPoint = getEndPoint();
while (true)
{
int filled = fill(endPoint, buffer);
if (LOG.isDebugEnabled()) // Avoid boxing of variable 'filled'
LOG.debug("Read {} bytes", filled);
if (filled == 0)
{
return 0;
}
else if (filled < 0)
{
shutdown(session);
return -1;
}
else
{
parser.parse(buffer);
}
}
}
private int fill(EndPoint endPoint, ByteBuffer buffer)
{
try
{
if (endPoint.isInputShutdown())
return -1;
return endPoint.fill(buffer);
}
catch (IOException x)
{
endPoint.close();
throw new RuntimeIOException(x);
}
}
@Override
public void write(final Callback callback, ByteBuffer... buffers)
{
EndPoint endPoint = getEndPoint();
endPoint.write(callback, buffers);
}
@Override
public void close()
{
goAway(session);
}
@Override
public void close(boolean onlyOutput)
{
EndPoint endPoint = getEndPoint();
// We need to gently close first, to allow
// SSL close alerts to be sent by Jetty
if (LOG.isDebugEnabled())
LOG.debug("Shutting down output {}", endPoint);
endPoint.shutdownOutput();
if (!onlyOutput)
{
if (LOG.isDebugEnabled())
LOG.debug("Closing {}", endPoint);
endPoint.close();
}
}
@Override
public void onIdle(boolean idle)
{
this.idle = idle;
}
@Override
protected boolean onReadTimeout()
{
boolean idle = this.idle;
if (LOG.isDebugEnabled())
LOG.debug("Idle timeout on {}, idle={}", this, idle);
if (idle)
goAway(session);
return false;
}
protected void goAway(ISession session)
{
if (session != null)
session.goAway(new GoAwayInfo(), Callback.Adapter.INSTANCE);
}
private void shutdown(ISession session)
{
if (session != null && !getEndPoint().isOutputShutdown())
session.shutdown();
}
protected ISession getSession()
{
return session;
}
public void setSession(ISession session)
{
this.session = session;
}
}