Apache MINA 基于UDP实例

1、基于UDP服务端

server

NioDatagramAcceptor acceptor = new NioDatagramAcceptor();
acceptor.setHandler(new MemoryMonitorHandler(this));
DefaultIoFilterChainBuilder chain = acceptor.getFilterChain();
chain.addLast("logger", new LoggingFilter());
DatagramSessionConfig dcfg = acceptor.getSessionConfig();
dcfg.setReuseAddress(true);acceptor.bind(new InetSocketAddress(PORT));
@Override
public void sessionCreated(IoSession session) throws Exception {
    SocketAddress remoteAddress = session.getRemoteAddress();
    server.addClient(remoteAddress);
}
@Override
public void messageReceived(IoSession session, Object message) throws Exception {
    if (message instanceof IoBuffer) {
        IoBuffer buffer = (IoBuffer) message;
        SocketAddress remoteAddress = session.getRemoteAddress();
        server.recvUpdate(remoteAddress, buffer.getLong());
    }
 }
@Override
public void sessionClosed(IoSession session) throws Exception {
    System.out.println("Session closed...");
    SocketAddress remoteAddress = session.getRemoteAddress();
    server.removeClient(remoteAddress);
}

client：

connector = new NioDatagramConnector();
connector.setHandler( this );
ConnectFuture connFuture = connector.connect( new InetSocketAddress("localhost", MemoryMonitor.PORT ));
connFuture.addListener( new IoFutureListener(){
            public void operationComplete(IoFuture future) {
                ConnectFuture connFuture = (ConnectFuture)future;
                if( connFuture.isConnected() ){
                    session = future.getSession();
                    try {
                        sendData();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                } else {
                    log.error("Not connected...exiting");
                }
            }
        });
private void sendData() throws InterruptedException {
    for (int i = 0; i < 30; i++) {
        long free = Runtime.getRuntime().freeMemory();
        IoBuffer buffer = IoBuffer.allocate(8);
        buffer.putLong(free);
        buffer.flip();
        session.write(buffer);
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
            throw new InterruptedException(e.getMessage());
        }
    }
}