001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. 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 package org.apache.activemq.kaha; 018 019 import java.io.DataInput; 020 import java.io.DataOutput; 021 import java.io.IOException; 022 import org.apache.activemq.command.Message; 023 import org.apache.activemq.util.ByteSequence; 024 import org.apache.activemq.wireformat.WireFormat; 025 026 /** 027 * Implementation of a Marshaller for MessageIds 028 * 029 * 030 */ 031 public class MessageMarshaller implements Marshaller<Message> { 032 033 private WireFormat wireFormat; 034 035 /** 036 * Constructor 037 * 038 * @param wireFormat 039 */ 040 public MessageMarshaller(WireFormat wireFormat) { 041 this.wireFormat = wireFormat; 042 } 043 044 /** 045 * Write the payload of this entry to the RawContainer 046 * 047 * @param message 048 * @param dataOut 049 * @throws IOException 050 */ 051 public void writePayload(Message message, DataOutput dataOut) throws IOException { 052 ByteSequence packet = wireFormat.marshal(message); 053 dataOut.writeInt(packet.length); 054 dataOut.write(packet.data, packet.offset, packet.length); 055 } 056 057 /** 058 * Read the entry from the RawContainer 059 * 060 * @param dataIn 061 * @return unmarshalled object 062 * @throws IOException 063 */ 064 public Message readPayload(DataInput dataIn) throws IOException { 065 int size = dataIn.readInt(); 066 byte[] data = new byte[size]; 067 dataIn.readFully(data); 068 return (Message)wireFormat.unmarshal(new ByteSequence(data)); 069 } 070 }