Apache Mina入门

Mina第一次听到这个名称的时候，我以为是个MM的名字米娜，后来才知道…

Apache MINA(Multipurpose Infrastructure for Network Applications)

官网http://mina.apache.org/

是 Apache 组织一个较新的项目，它为开发高性能和高可用性的网络应用程序提供了非常便利的框架。当前发行的 MINA 版本支持基于 Java NIO 技术的 TCP/UDP 应用程序开发、串口通讯程序（只在最新的预览版中提供），MINA 所支持的功能也在进一步的扩展中。 目前正在使用 MINA 的软件包括有：Apache Directory Project、AsyncWeb、AMQP（Advanced Message Queuing Protocol）、RED5 Server（Macromedia Flash Media RTMP）、ObjectRADIUS、Openfire 等等。

本文就介绍入门mina的入门,

参考文档http://mina.apache.org/mina-project/quick-start-guide.html

第一步、定义MinaTimeServer.java mina服务端

/**

*

*/

package com.figo.onlineshop.test;

import java.io.IOException;

import java.net.InetSocketAddress;

import java.nio.charset.Charset;

import org.apache.mina.core.service.IoAcceptor;

import org.apache.mina.core.session.IdleStatus;

import org.apache.mina.filter.codec.ProtocolCodecFilter;

import org.apache.mina.filter.codec.textline.TextLineCodecFactory;

import org.apache.mina.filter.logging.LoggingFilter;

import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

/**

* @author zhuzhifei

*

*/

public class MinaTimeServer {

private static final int PORT = 9123;

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

//定义socket接收器

IoAcceptor acceptor = new NioSocketAcceptor();

//添加日志记录

acceptor.getFilterChain().addLast( "logger", new LoggingFilter() );

//添加编码解码器

acceptor.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));

//添加处理器(用于接收数据后处理处理数据逻辑)

acceptor.setHandler(  new TimeServerHandler() );

//设置读取数据缓存单位byte

acceptor.getSessionConfig().setReadBufferSize( 2048 );

//设置多长时间后接收器开始空闲

acceptor.getSessionConfig().setIdleTime( IdleStatus.BOTH_IDLE, 10 );

try {

//绑定某个端口，作为数据入口

acceptor.bind( new InetSocketAddress(PORT) );

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

第二步、定义消息处理器TimeServerHandler.java

/**

*

*/

package com.figo.onlineshop.test;

import java.util.Date;

import org.apache.mina.core.service.IoHandlerAdapter;

import org.apache.mina.core.session.IdleStatus;

import org.apache.mina.core.session.IoSession;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

* @author zhuzhifei

*

*/

//必须继承IoHandlerAdapter

public class TimeServerHandler extends IoHandlerAdapter {

private final Logger logger = LoggerFactory.getLogger(MinaTimeServer.class);

//补抓异常

@Override

public void exceptionCaught(IoSession session, Throwable cause)

throws Exception {

// TODO Auto-generated method stub

super.exceptionCaught(session, cause);

}

//获取客户端消息后处理逻辑

@Override

public void messageReceived(IoSession session, Object message)

throws Exception {

// TODO Auto-generated method stub

super.messageReceived(session, message);

String str = message.toString();

if( str.trim().equalsIgnoreCase("quit") ) {

session.close(true);

return;

}

Date date = new Date();

session.write( "current time:"+date.toString() );//该消息将返回给客户端

System.out.println("Message Received:"+str);

logger.info(date.toString()+"Message Received:"+str);//日志没有输出why?

}

//发送消息

@Override

public void messageSent(IoSession session, Object message) throws Exception {

// TODO Auto-generated method stub

super.messageSent(session, message);

}

//当前会话关闭

@Override

public void sessionClosed(IoSession session) throws Exception {

// TODO Auto-generated method stub

super.sessionClosed(session);

}

//创建会话

@Override

public void sessionCreated(IoSession session) throws Exception {

// TODO Auto-generated method stub

super.sessionCreated(session);

}

//会话空闲

@Override

public void sessionIdle(IoSession session, IdleStatus status)

throws Exception {

// TODO Auto-generated method stub

super.sessionIdle(session, status);

System.out.println( "IDLE " + session.getIdleCount( status ));

}

//打开会话

@Override

public void sessionOpened(IoSession session) throws Exception {

// TODO Auto-generated method stub

super.sessionOpened(session);

}

}

第三步、模拟客户端tcp调用

MinaTimeServer.java run as java Application后

C:\Documents and Settings\zhuzhifei>telnet 127.0.0.1 9123 连上服务器

客户端输入：abc后

服务端接收到：

2012-12-25 18:26:52 INFO  com.figo.onlineshop.test.MinaTimeServer - Tue Dec 25 18:26:52 CST 2012Message Received:abc

客户端显示：current time:Tue Dec 25 18:26:52 CST 2012