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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.http2;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Queue;
import java.util.concurrent.Executor;
import org.eclipse.jetty.http2.parser.Parser;
import org.eclipse.jetty.io.AbstractConnection;
import org.eclipse.jetty.io.ByteBufferPool;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.ConcurrentArrayQueue;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.util.thread.ExecutionStrategy;
public class HTTP2Connection extends AbstractConnection
{
protected static final Logger LOG = Log.getLogger(HTTP2Connection.class);
private final Queue<Runnable> tasks = new ConcurrentArrayQueue<>();
private final ByteBufferPool byteBufferPool;
private final Parser parser;
private final ISession session;
private final int bufferSize;
private final HTTP2Producer producer = new HTTP2Producer();
private final ExecutionStrategy executionStrategy;
public HTTP2Connection(ByteBufferPool byteBufferPool, Executor executor, EndPoint endPoint, Parser parser, ISession session, int bufferSize)
{
super(endPoint, executor);
this.byteBufferPool = byteBufferPool;
this.parser = parser;
this.session = session;
this.bufferSize = bufferSize;
this.executionStrategy = ExecutionStrategy.Factory.instanceFor(producer, executor);
}
public ISession getSession()
{
return session;
}
protected Parser getParser()
{
return parser;
}
protected void setInputBuffer(ByteBuffer buffer)
{
producer.buffer = buffer;
}
@Override
public void onOpen()
{
if (LOG.isDebugEnabled())
LOG.debug("HTTP2 Open {} ", this);
super.onOpen();
executionStrategy.execute();
}
@Override
public void onClose()
{
if (LOG.isDebugEnabled())
LOG.debug("HTTP2 Close {} ", this);
super.onClose();
}
@Override
public void onFillable()
{
if (LOG.isDebugEnabled())
LOG.debug("HTTP2 onFillable {} ", this);
executionStrategy.execute();
}
private int fill(EndPoint endPoint, ByteBuffer buffer)
{
try
{
if (endPoint.isInputShutdown())
return -1;
return endPoint.fill(buffer);
}
catch (IOException x)
{
LOG.debug("Could not read from " + endPoint, x);
return -1;
}
}
@Override
public boolean onIdleExpired()
{
boolean close = session.onIdleTimeout();
boolean idle = isFillInterested();
if (close && idle)
session.close(ErrorCode.NO_ERROR.code, "idle_timeout", Callback.NOOP);
return false;
}
protected void offerTask(Runnable task, boolean dispatch)
{
tasks.offer(task);
if (dispatch)
executionStrategy.dispatch();
else
executionStrategy.execute();
}
@Override
public void close()
{
// We don't call super from here, otherwise we close the
// endPoint and we're not able to read or write anymore.
session.close(ErrorCode.NO_ERROR.code, "close", Callback.NOOP);
}
protected class HTTP2Producer implements ExecutionStrategy.Producer
{
private ByteBuffer buffer;
@Override
public Runnable produce()
{
Runnable task = tasks.poll();
if (LOG.isDebugEnabled())
LOG.debug("Dequeued task {}", task);
if (task != null)
return task;
if (isFillInterested())
return null;
if (buffer == null)
buffer = byteBufferPool.acquire(bufferSize, false); // TODO: make directness customizable
boolean looping = BufferUtil.hasContent(buffer);
while (true)
{
if (looping)
{
while (buffer.hasRemaining())
parser.parse(buffer);
task = tasks.poll();
if (LOG.isDebugEnabled())
LOG.debug("Dequeued task {}", task);
if (task != null)
{
release();
return task;
}
}
int filled = fill(getEndPoint(), buffer);
if (LOG.isDebugEnabled())
LOG.debug("Filled {} bytes", filled);
if (filled == 0)
{
release();
fillInterested();
return null;
}
else if (filled < 0)
{
release();
session.onShutdown();
return null;
}
looping = true;
}
}
private void release()
{
if (buffer != null && !buffer.hasRemaining())
{
byteBufferPool.release(buffer);
buffer = null;
}
}
}
}
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