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    }