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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.type.Binary;
import java.nio.ByteBuffer;
import java.util.Map;
public class ProtocolHeaderTransport implements BytesTransport
{
private final Object _inputLock = new Object();
private final Object _outputLock = new Object();
private volatile boolean _inputOpen;
private volatile boolean _outputOpen;
private final Map<Binary,BytesTransport> _headersMap;
private BytesTransport _delegate;
private ByteBuffer _bytesToSend;
private byte[] _header = new byte[8];
private int _received;
private ByteBuffer _outputBuffer;
public ProtocolHeaderTransport(Map<Binary, BytesTransport> validHeaders)
{
_headersMap = validHeaders;
// if only one valid header then we can send, else we have to wait
}
public boolean isOpenForInput()
{
return _inputOpen;
}
public void inputClosed()
{
synchronized(_inputLock)
{
_inputOpen = false;
_inputLock.notifyAll();
}
}
public void processBytes(final ByteBuffer buf)
{
if(_delegate != null)
{
_delegate.processBytes(buf);
}
else
{
while( _received < 8 && buf.hasRemaining())
{
_header[_received++] = buf.get();
}
if(_received == 8)
{
Binary header = new Binary(_header);
_delegate = _headersMap.get(header);
if(_delegate != null)
{
_delegate.processBytes(ByteBuffer.wrap(_header));
_delegate.processBytes(buf);
}
else
{
inputClosed();
_outputBuffer = _headersMap.keySet().iterator().next().asByteBuffer();
}
}
}
}
public void setInputStateChangeListener(final StateChangeListener listener)
{
//To change body of implemented methods use File | Settings | File Templates.
}
public void getNextBytes(final BytesProcessor processor)
{
if(_bytesToSend != null && _bytesToSend.hasRemaining())
{
processor.processBytes(_bytesToSend);
}
else if(_delegate != null)
{
_delegate.getNextBytes(processor);
}
}
public void outputClosed()
{
synchronized (_outputLock)
{
_outputOpen = false;
_outputLock.notifyAll();
}
}
public boolean isOpenForOutput()
{
return _outputOpen;
}
public void setOutputStateChangeListener(final StateChangeListener listener)
{
//To change body of implemented methods use File | Settings | File Templates.
}
}
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