/**
* 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.proton.jms;
import org.apache.qpid.proton.codec.CompositeWritableBuffer;
import org.apache.qpid.proton.codec.DroppingWritableBuffer;
import org.apache.qpid.proton.codec.WritableBuffer;
import org.apache.qpid.proton.amqp.UnsignedInteger;
import javax.jms.BytesMessage;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageFormatException;
import java.nio.ByteBuffer;
import org.apache.qpid.proton.message.impl.MessageImpl;
/**
* @author <a href="http://hiramchirino.com">Hiram Chirino</a>
*/
public class AMQPNativeOutboundTransformer extends OutboundTransformer {
public AMQPNativeOutboundTransformer(JMSVendor vendor) {
super(vendor);
}
@Override
public EncodedMessage transform(Message msg) throws Exception {
if( msg == null )
return null;
if( !(msg instanceof BytesMessage) )
return null;
try {
if( !msg.getBooleanProperty(prefixVendor + "NATIVE") ) {
return null;
}
} catch (MessageFormatException e) {
return null;
}
return transform(this, (BytesMessage) msg);
}
static EncodedMessage transform(OutboundTransformer options, BytesMessage msg) throws JMSException {
long messageFormat;
try {
messageFormat = msg.getLongProperty(options.prefixVendor + "MESSAGE_FORMAT");
} catch (MessageFormatException e) {
return null;
}
byte data[] = new byte[(int) msg.getBodyLength()];
int dataSize = data.length;
msg.readBytes(data);
msg.reset();
try {
int count = msg.getIntProperty("JMSXDeliveryCount");
if( count > 1 ) {
// decode...
MessageImpl amqp = new MessageImpl();
int offset = 0;
int len = data.length;
while( len > 0 ) {
final int decoded = amqp.decode(data, offset, len);
assert decoded > 0: "Make progress decoding the message";
offset += decoded;
len -= decoded;
}
// Update the DeliveryCount header...
amqp.getHeader().setDeliveryCount(new UnsignedInteger(count));
// Re-encode...
ByteBuffer buffer = ByteBuffer.wrap(new byte[1024*4]);
final DroppingWritableBuffer overflow = new DroppingWritableBuffer();
int c = amqp.encode(new CompositeWritableBuffer(new WritableBuffer.ByteBufferWrapper(buffer), overflow));
if( overflow.position() > 0 ) {
buffer = ByteBuffer.wrap(new byte[1024*4+overflow.position()]);
c = amqp.encode(new WritableBuffer.ByteBufferWrapper(buffer));
}
data = buffer.array();
dataSize = c;
}
} catch (JMSException e) {
}
return new EncodedMessage(messageFormat, data, 0, dataSize);
}
}