MINA架构DEMO

参考：Java中的MINA框架_java mina_小陈拾光的博客-CSDN博客

MINA：一个简洁易用的基于TCP/IP通信的JAVA框架。

    org.apache.mina
    mina-core
    2.1.5

先启动server，之后启动client，则首先server和client均会创建sessionCreated 和 sessionOpened，之后client发送消息：messageSent，cf.getSession().write(msg)

则server端，可以收到消息，之后server端发送，也是session.write(msg)，messageSent。可参考如下：

 结果：Client端

Connected to the target VM, address: '127.0.0.1:62483', transport: 'socket'
MinaClientHandler-sessionCreated (0x00000001: nio socket, client, /127.0.0.1:62534 => localhost/127.0.0.1:9999)
MinaClientHandler-sessionOpened (0x00000001: nio socket, client, /127.0.0.1:62534 => localhost/127.0.0.1:9999)
MinaClientHandler-messageSent (0x00000001: nio socket, client, /127.0.0.1:62534 => localhost/127.0.0.1:9999)  Message{from='clientfrom', to='clientto', type='clientsend', info='clientinfo'}
16:44:28.700 [NioProcessor-2] DEBUG org.apache.mina.filter.codec.ProtocolCodecFilter - Processing a MESSAGE_RECEIVED for session 1
MinaClientHandler-messageReceived (0x00000001: nio socket, client, /127.0.0.1:62534 => localhost/127.0.0.1:9999)  Message{from='serverFrom', to='serverTo', type='serversent', info='serverInfo'}

服务端：server:

Connected to the target VM, address: '127.0.0.1:62391', transport: 'socket'
Mina Server Running,Listener on : 9999
MinaServerHandler  sessionCreated (0x00000001: nio socket, server, /127.0.0.1:62534 => /127.0.0.1:9999)
 MinaServerHandler -sessionOpened  welcome client: /127.0.0.1:62534
16:44:28.684 [NioProcessor-2] DEBUG org.apache.mina.filter.codec.ProtocolCodecFilter - Processing a MESSAGE_RECEIVED for session 1
 MinaServerHandler messageReceived 收到客户端发来的消息：(0x00000001: nio socket, server, /127.0.0.1:62534 => /127.0.0.1:9999) Message{from='clientfrom', to='clientto', type='clientsend', info='clientinfo'}
MinaServerHandler  messageSent (0x00000001: nio socket, server, /127.0.0.1:62534 => /127.0.0.1:9999)  Message{from='serverFrom', to='serverTo', type='serversent', info='serverInfo'}

如果Server不关闭，只关闭Client，则会向服务器发送：

MinaServerHandler-exceptionCaught (0x00000001: nio socket, server, /127.0.0.1:49956 => /127.0.0.1:9999)  java.io.IOException: 远程主机强迫关闭了一个现有的连接。
MinaServerHandler  client closed (0x00000001: nio socket, server, /127.0.0.1:49956 => 0.0.0.0/0.0.0.0:9999)

如果客户端不关闭，只关闭 服务端Server，则此时会在Client出现：

MinaClientHandler-exceptionCaught (0x00000001: nio socket, client, /127.0.0.1:50335 => localhost/127.0.0.1:9999)  java.io.IOException: 远程主机强迫关闭了一个现有的连接。
MinaClientHandler-sessionClosed (0x00000001: nio socket, client, 0.0.0.0/0.0.0.0:50335 => localhost/127.0.0.1:9999)

代码如下：

package mina;

import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.serialization.ObjectSerializationCodecFactory;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.SocketAcceptor;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Iterator;

/**
 *服务器
 */
public class Server {
    public static void main(String[] args) {
        //创建一个非阻塞的Server端Socket  NIO
        SocketAcceptor acceptor = new NioSocketAcceptor();
        DefaultIoFilterChainBuilder Chain = acceptor.getFilterChain();
        //设定一个过滤器，一行一行的读取数据（/r/n）
//        Chain.addLast("myChain",new ProtocolCodecFilter(new TextLineCodecFactory()));
        //设定过滤器，以对象为单位来读取数据
        Chain.addLast("objectFilter",new ProtocolCodecFilter(new ObjectSerializationCodecFactory()));
        //设置服务端的消息处理器
        acceptor.setHandler(new MinaServerHandler());
        //定义端口号
        int port = 9999;
        try {
            //绑定端口，启动服务器（不会阻塞，立即返回）
            acceptor.bind(new InetSocketAddress(port));
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println("Mina Server Running,Listener on : "+port);
    }
}

package mina;

import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;

/**
 *
 * 
mina
 *
 * 类说明
 *
 * @author duanxj
 * @version
 */
public class MinaServerHandler extends IoHandlerAdapter{

    @Override
    public void exceptionCaught(IoSession session, Throwable cause)
            throws Exception {
        System.out.println("MinaServerHandler-exceptionCaught "+session+"  "+cause);
    }

    //接收消息
    @Override
    public void messageReceived(IoSession session, Object message)
            throws Exception {

        super.messageReceived(session, message);

//        String msg = (String) message;//接收到的消息对象
        Message msg = (Message)message;
        System.out.println(" MinaServerHandler messageReceived 收到客户端发来的消息："+session+" "+msg);

        //向客户端发送消息对象
        msg.setFrom("serverFrom");
        msg.setTo("serverTo");
        msg.setType("serversent");
        msg.setInfo("serverInfo");
        session.write(msg);
    }

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

        System.out.println("MinaServerHandler  messageSent "+session+"  "+message);
    }


    //会话关闭
    @Override
    public void sessionClosed(IoSession session) throws Exception {
        super.sessionClosed(session);
        System.out.println("MinaServerHandler  client closed "+session);
    }

    @Override
    public void sessionCreated(IoSession session) throws Exception {
        System.out.println("MinaServerHandler  sessionCreated "+session);
    }

    @Override
    public void sessionIdle(IoSession session, IdleStatus status)
            throws Exception {
        System.out.println("MinaServerHandler  sessionIdle "+session+"  "+status);
    }

    //一次会话被打开
    @Override
    public void sessionOpened(IoSession session) throws Exception {
        super.sessionOpened(session);
        System.out.println(" MinaServerHandler -sessionOpened  welcome client: "+session.getRemoteAddress());
    }
}

package mina;

import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.serialization.ObjectSerializationCodecFactory;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.nio.NioSocketConnector;

import java.net.InetSocketAddress;
import java.util.Scanner;

/**
 * @date 2022/4/15--9:20
 * 客户端
 */
public class Client {
    public static void main(String[] args) {
        //创建连接
        NioSocketConnector connector = new NioSocketConnector();
        DefaultIoFilterChainBuilder chain = connector.getFilterChain();
//        chain.addLast("myChain",new ProtocolCodecFilter(new TextLineCodecFactory()));
        //设定过滤器，以对象为单位来读取数据
        chain.addLast("objectFilter",new ProtocolCodecFilter(new ObjectSerializationCodecFactory()));
        connector.setHandler(new MinaClientHandler());
        connector.setConnectTimeoutMillis(10000);
        //连接服务器
        ConnectFuture cf =connector.connect(new InetSocketAddress("localhost",9999));
        cf.awaitUninterruptibly();//等待连接成功
        //Scanner input = new Scanner(System.in);

//        while (true){
//            System.out.println("请输入：");
//            String info= input.nextLine();
//            //发送消息
//            cf.getSession().write(info);
//        }
        //以对象的方式传输数据
        Message msg = new Message();
        //System.out.println("from:");
        msg.setFrom("clientfrom");
       // System.out.println("To:");
        msg.setTo("clientto");
       // msg.setTo(input.nextLine());
        //System.out.println("info");;
        msg.setInfo("clientinfo");
        msg.setType("clientsend");
        cf.getSession().write(msg);
        //等待服务器连接关闭，结束长连接
//        cf.getSession().getCloseFuture().awaitUninterruptibly()
        //connector.dispose();
    }
}

package mina;

import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;

/**
 * @date 2022/4/15--9:21
 * 客户端消息处理器
 */
public class MinaClientHandler extends IoHandlerAdapter {
    @Override
    public void sessionOpened(IoSession session) throws Exception {
        super.sessionOpened(session);
        System.out.println("MinaClientHandler-sessionOpened "+session);
    }

    @Override
    public void sessionCreated(IoSession session) throws Exception {
        System.out.println("MinaClientHandler-sessionCreated "+session);
    }

    @Override
    public void sessionIdle(IoSession session, IdleStatus status)
            throws Exception {
        System.out.println("MinaClientHandler-sessionIdle "+session+"  "+status);
    }

    @Override
    public void sessionClosed(IoSession session) throws Exception {
        super.sessionClosed(session);
        System.out.println("MinaClientHandler-sessionClosed "+session);
    }

    @Override
    public void messageSent(IoSession session, Object message) throws Exception {
        System.out.println("MinaClientHandler-messageSent "+session+"  "+message);
    }

    @Override
    public void exceptionCaught(IoSession session, Throwable cause)
            throws Exception {
        System.out.println("MinaClientHandler-exceptionCaught "+session+"  "+cause);
    }


    @Override
    public void messageReceived(IoSession session, Object message) throws Exception {
        super.messageReceived(session, message);
//        String msg = (String) message;
        Message msg = (Message) message;
        System.out.println("MinaClientHandler-messageReceived "+session+"  "+msg);
    }
}

package mina;

import java.io.Serializable;

/**
 * @date 2022/4/15--9:49
 */
public class Message implements Serializable {

    private String from;
    private String to;
    private String type;
    private String info;

    public String getFrom() {
        return from;
    }

    public void setFrom(String from) {
        this.from = from;
    }

    public String getTo() {
        return to;
    }

    public void setTo(String to) {
        this.to = to;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }

    @Override
    public String toString() {
        return "Message{" +
                "from='" + from + '\'' +
                ", to='" + to + '\'' +
                ", type='" + type + '\'' +
                ", info='" + info + '\'' +
                '}';
    }
}