| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.catalina.tribes; |
| |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| |
| /** |
| * A byte message is not serialized and deserialized by the channel |
| * instead it is sent as a byte array<br> |
| * By default Tribes uses java serialization when it receives an object |
| * to be sent over the wire. Java serialization is not the most |
| * efficient of serializing data, and Tribes might not even |
| * have access to the correct class loaders to deserialize the object properly. |
| * <br> |
| * The ByteMessage class is a class where the channel when it receives it will |
| * not attempt to perform serialization, instead it will simply stream the <code>getMessage()</code> |
| * bytes.<br> |
| * If you are using multiple applications on top of Tribes you should add some sort of header |
| * so that you can decide with the <code>ChannelListener.accept()</code> whether this message was intended |
| * for you. |
| * @author Filip Hanik |
| * @version $Id$ |
| */ |
| |
| public class ByteMessage implements Externalizable { |
| /** |
| * Storage for the message to be sent |
| */ |
| private byte[] message; |
| |
| |
| /** |
| * Creates an empty byte message |
| * Constructor also for deserialization |
| */ |
| public ByteMessage() { |
| } |
| |
| /** |
| * Creates a byte message wit h |
| * @param data byte[] - the message contents |
| */ |
| public ByteMessage(byte[] data) { |
| message = data; |
| } |
| |
| /** |
| * Returns the message contents of this byte message |
| * @return byte[] - message contents, can be null |
| */ |
| public byte[] getMessage() { |
| return message; |
| } |
| |
| /** |
| * Sets the message contents of this byte message |
| * @param message byte[] |
| */ |
| public void setMessage(byte[] message) { |
| this.message = message; |
| } |
| |
| /** |
| * @see java.io.Externalizable#readExternal |
| * @param in ObjectInput |
| * @throws IOException |
| */ |
| @Override |
| public void readExternal(ObjectInput in ) throws IOException { |
| int length = in.readInt(); |
| message = new byte[length]; |
| in.readFully(message); |
| } |
| |
| /** |
| * @see java.io.Externalizable#writeExternal |
| * @param out ObjectOutput |
| * @throws IOException |
| */ |
| @Override |
| public void writeExternal(ObjectOutput out) throws IOException { |
| out.writeInt(message!=null?message.length:0); |
| if ( message!=null ) out.write(message,0,message.length); |
| } |
| |
| } |