101 lines
3.2 KiB
Java
101 lines
3.2 KiB
Java
/*
|
|
* 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.
|
|
*/
|
|
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 An IO error occurred
|
|
*/
|
|
@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 An IO error occurred
|
|
*/
|
|
@Override
|
|
public void writeExternal(ObjectOutput out) throws IOException {
|
|
out.writeInt(message!=null?message.length:0);
|
|
if ( message!=null ) out.write(message,0,message.length);
|
|
}
|
|
|
|
}
|