001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 **/
018
019 package org.activemq.io.impl;
020 import java.io.DataOutput;
021 import java.io.IOException;
022 import org.activemq.message.CachedValue;
023 import org.activemq.message.Packet;
024
025 /**
026 * Writes a KeepAlive object to a Stream
027 */
028
029 public class CachedValueWriter extends AbstractPacketWriter {
030
031 /**
032 * Return the type of Packet
033 *
034 * @return integer representation of the type of Packet
035 */
036
037 public int getPacketType() {
038 return Packet.CACHED_VALUE_COMMAND;
039 }
040
041 /**
042 * Write a Packet instance to data output stream
043 *
044 * @param packet
045 * the instance to be seralized
046 * @param dataOut
047 * the output stream
048 * @throws IOException
049 * thrown if an error occurs
050 */
051
052 public void writePacket(Packet packet, DataOutput dataOut) throws IOException {
053 CachedValue cv = (CachedValue)packet;
054 super.writePacket(cv, dataOut);
055 super.writeObject(cv.getValue(), dataOut);
056 }
057
058 }