/*
* Copyright 2004-2006 the original author or authors.
*
* Licensed 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 net.sf.cindy.example.chat;
import java.nio.ByteBuffer;
import net.sf.cindy.Buffer;
import net.sf.cindy.Packet;
import net.sf.cindy.PacketDecoder;
import net.sf.cindy.PacketEncoder;
import net.sf.cindy.Session;
import net.sf.cindy.SessionAcceptor;
import net.sf.cindy.SessionAcceptorHandler;
import net.sf.cindy.SessionType;
import net.sf.cindy.buffer.BufferFactory;
import net.sf.cindy.packet.DefaultPacket;
import net.sf.cindy.session.SessionFactory;
import net.sf.cindy.util.Charset;
/**
* Chat server.
*
* @author <a href="chenrui@gmail.com">Roger Chen</a>
* @version $id$
*/
public class ChatServer {
private static final byte[] TOKEN = System.getProperty("line.separator")
.getBytes();
/**
* Decode <code>Packet</code> to chat message.
*
* @author <a href="chenrui@gmail.com">Roger Chen</a>
* @version $id$
*/
private static class ChatMessageDecoder implements PacketDecoder {
public Object decode(Session session, Packet packet) throws Exception {
Buffer buffer = packet.getContent();
int index = buffer.indexOf(TOKEN);
if (index >= 0) {
String s = buffer.getString(Charset.SYSTEM, index
- buffer.position());
buffer.skip(TOKEN.length);
return s;
}
return null;
}
}
/**
* Encode chat message to <code>Packet</code>.
*
* @author <a href="chenrui@gmail.com">Roger Chen</a>
* @version $id$
*/
private static class ChatMessageEncoder implements PacketEncoder {
public Packet encode(Session session, Object obj) throws Exception {
String s = (String) obj;
ByteBuffer buffer = Charset.SYSTEM.encode(s);
return new DefaultPacket(BufferFactory.allocate(
buffer.remaining() + TOKEN.length).put(buffer).put(TOKEN)
.flip());
}
}
public static void main(String[] args) throws Exception {
SessionAcceptor acceptor = SessionFactory
.createSessionAcceptor(SessionType.TCP);
acceptor.setAcceptorHandler(new SessionAcceptorHandler() {
public void sessionAccepted(SessionAcceptor acceptor,
Session session) throws Exception {
session.setPacketDecoder(new ChatMessageDecoder());
session.setPacketEncoder(new ChatMessageEncoder());
session.addSessionFilter(new ChatLogFilter());
session.setSessionHandler(new ChatHandler());
session.start();
}
public void exceptionCaught(SessionAcceptor acceptor,
Throwable cause) {
System.err.println(cause);
}
});
acceptor.start();
if (acceptor.isStarted())
System.out.println("ChatServer listen on "
+ acceptor.getListenAddress());
}
}