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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.qpid.amqp_1_0.transport;
import org.apache.qpid.amqp_1_0.codec.FrameWriter;
import org.apache.qpid.amqp_1_0.framing.AMQFrame;
import org.apache.qpid.amqp_1_0.framing.TransportFrame;
import org.apache.qpid.amqp_1_0.type.FrameBody;
import java.nio.ByteBuffer;
public class AMQPTransport implements BytesTransport
{
private volatile boolean _inputOpen = true;
private volatile boolean _outputOpen = true;
private static final int INPUT_BUFFER_SIZE = 1 << 16;
private static final int OUTPUT_BUFFER_SIZE = 1 << 16;
private final CircularBytesBuffer _inputBuffer = new CircularBytesBuffer(INPUT_BUFFER_SIZE);
private TransportFrame _currentInputFrame;
private boolean _readingFrames;
private final CircularBytesBuffer _outputBuffer = new CircularBytesBuffer(OUTPUT_BUFFER_SIZE);
private AMQFrame<FrameBody> _currentOutputFrame;
private AMQPFrameTransport _frameTransport;
private FrameWriter _frameWriter;
private final BytesProcessor _frameWriterProcessor = new BytesProcessor()
{
public void processBytes(final ByteBuffer buf)
{
_frameWriter.writeToBuffer(buf);
if(_frameWriter.isComplete())
{
_currentOutputFrame = null;
}
}
};
private StateChangeListener _inputListener;
private StateChangeListener _outputListener;
public AMQPTransport(AMQPFrameTransport frameTransport)
{
_frameTransport = frameTransport;
_frameWriter = new FrameWriter(_frameTransport.getRegistry());
_outputBuffer.put( ByteBuffer.wrap( new byte[] { (byte) 'A',
(byte) 'M',
(byte) 'Q',
(byte) 'P',
(byte) 0,
_frameTransport.getMajorVersion(),
_frameTransport.getMajorVersion(),
_frameTransport.getRevision(),
} ) );
}
public boolean isOpenForInput()
{
return _inputOpen;
}
public void inputClosed()
{
_inputOpen = false;
}
public void processBytes(final ByteBuffer buf)
{
_inputBuffer.put(buf);
if(!_readingFrames)
{
if(_inputBuffer.size()>=8)
{
final byte[] incomingHeader = new byte[8];
_inputBuffer.get(new BytesProcessor()
{
public void processBytes(final ByteBuffer buf)
{
buf.get(incomingHeader);
}
});
_frameTransport.setVersion(incomingHeader[5], incomingHeader[6], incomingHeader[7]);
_readingFrames = true;
}
}
else
{
}
//To change body of implemented methods use File | Settings | File Templates.
}
public void setInputStateChangeListener(final StateChangeListener listener)
{
_inputListener = listener;
_frameTransport.setInputStateChangeListener(listener);
}
public void getNextBytes(final BytesProcessor processor)
{
// First try to fill the buffer as much as possible with frames
while(!_outputBuffer.isFull())
{
if(_currentOutputFrame == null)
{
_currentOutputFrame = _frameTransport.getNextFrame();
_frameWriter.setValue(_currentOutputFrame);
}
if(_currentOutputFrame == null)
{
break;
}
_outputBuffer.put(_frameWriterProcessor);
}
}
public void outputClosed()
{
_outputOpen = false;
}
public boolean isOpenForOutput()
{
return _outputOpen;
}
public void setOutputStateChangeListener(final StateChangeListener listener)
{
_outputListener = listener;
}
}
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