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1   /***
2    *
3    * Copyright 2004 Protique Ltd
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   *
17   **/
18  
19  
20  package org.codehaus.activemq.message;
21  
22  import java.io.DataOutput;
23  import java.io.IOException;
24  import org.codehaus.activemq.util.BitArray;
25  
26  /***
27   * Writes a ConsumerInfo object to a Stream
28   */
29  
30  public class MessageAckWriter extends AbstractPacketWriter {
31  
32  
33      /***
34       * Return the type of Packet
35       *
36       * @return integer representation of the type of Packet
37       */
38  
39      public int getPacketType() {
40          return Packet.ACTIVEMQ_MSG_ACK;
41      }
42  
43      /***
44       * Write a Packet instance to data output stream
45       *
46       * @param packet  the instance to be seralized
47       * @param dataOut the output stream
48       * @throws IOException thrown if an error occurs
49       */
50  
51      public void writePacket(Packet packet, DataOutput dataOut) throws IOException {
52          super.writePacket(packet, dataOut);
53          MessageAck ack = (MessageAck) packet;
54          super.writeUTF(ack.getConsumerId(), dataOut);
55          super.writeUTF(ack.getMessageID(), dataOut);
56          super.writeUTF(ack.getTransactionId(), dataOut);
57          
58          BitArray ba = new BitArray();
59          ba.set(MessageAck.MESSAGE_READ_INDEX, ack.isMessageRead());
60          ba.set(MessageAck.XA_TRANSACTED_INDEX, ack.isXaTransacted());
61          ba.set(MessageAck.PERSISTENT_INDEX,ack.isPersistent());
62          ba.writeToStream(dataOut);
63          
64          ActiveMQDestination.writeToStream((ActiveMQDestination) ack.getDestination(), dataOut);
65      }
66  
67  
68  }