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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  }