/*
* 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.activemq.transport.amqp.message;
import static org.apache.activemq.transport.amqp.message.AmqpMessageSupport.JMS_AMQP_MESSAGE_FORMAT;
import static org.apache.activemq.transport.amqp.message.AmqpMessageSupport.getBinaryFromMessageBody;
import javax.jms.JMSException;
import javax.jms.MessageFormatException;
import org.apache.activemq.command.ActiveMQBytesMessage;
import org.apache.activemq.command.ActiveMQMessage;
import org.apache.qpid.proton.amqp.Binary;
import org.apache.qpid.proton.amqp.UnsignedInteger;
import org.apache.qpid.proton.amqp.messaging.Header;
import org.apache.qpid.proton.message.ProtonJMessage;
public class AMQPNativeOutboundTransformer implements OutboundTransformer {
@Override
public EncodedMessage transform(ActiveMQMessage message) throws Exception {
if (message == null || !(message instanceof ActiveMQBytesMessage)) {
return null;
}
return transform(this, (ActiveMQBytesMessage) message);
}
static EncodedMessage transform(OutboundTransformer options, ActiveMQBytesMessage message) throws JMSException {
long messageFormat;
try {
messageFormat = message.getLongProperty(JMS_AMQP_MESSAGE_FORMAT);
} catch (MessageFormatException e) {
return null;
}
Binary encodedMessage = getBinaryFromMessageBody(message);
byte encodedData[] = encodedMessage.getArray();
int encodedSize = encodedMessage.getLength();
int count = message.getRedeliveryCounter();
if (count >= 1) {
// decode...
ProtonJMessage amqp = (ProtonJMessage) org.apache.qpid.proton.message.Message.Factory.create();
int offset = 0;
int len = encodedSize;
while (len > 0) {
final int decoded = amqp.decode(encodedData, offset, len);
assert decoded > 0 : "Make progress decoding the message";
offset += decoded;
len -= decoded;
}
// Update the DeliveryCount header...
// The AMQP delivery-count field only includes prior failed delivery attempts,
// whereas JMSXDeliveryCount includes the first/current delivery attempt. Subtract 1.
if (amqp.getHeader() == null) {
amqp.setHeader(new Header());
}
amqp.getHeader().setDeliveryCount(new UnsignedInteger(count));
// Re-encode...
final AmqpWritableBuffer buffer = new AmqpWritableBuffer();
int written = amqp.encode(buffer);
encodedData = buffer.getArray();
encodedSize = written;
}
return new EncodedMessage(messageFormat, encodedData, 0, encodedSize);
}
}