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 }