Mina实战六：不独立启动Server，Client通信

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/haoranhaoshi/article/details/89109412

Mina框架介绍：https://blog.csdn.net/haoranhaoshi/article/details/89102597
Mina实战一：建立Server和Client。有Client加入，Server广播给所有Client：https://blog.csdn.net/haoranhaoshi/article/details/89103348
Mina实战二：在控制台中Client可以给Sever和其他Client发送数据：https://blog.csdn.net/haoranhaoshi/article/details/89103887
Mina实战三：特定角色的Client处理消息：https://blog.csdn.net/haoranhaoshi/article/details/89103993
Mina实战四：特定角色收到消息：https://blog.csdn.net/haoranhaoshi/article/details/89108502
Mina实战五：Client启动时如果没有Server，就先建立Server：https://blog.csdn.net/haoranhaoshi/article/details/89108625
Mina实战六：不独立启动Server，Client通信：https://blog.csdn.net/haoranhaoshi/article/details/89109412
Mina实战工程下载：https://download.csdn.net/download/haoranhaoshi/11100668

本篇：一个进程中包括Server和Client，进程A和B通信，Server负责接收另一个进程的消息，Client负责发送给另一个进程消息，无需Server独立启动，或者绑定在一个进程中，保证最后离线，或者绑定在一个进程中，进程离线后绑定在其他进程中。把Client中的OWN_SERVER_PORT和ANOTHER_SERVER_PORT调换后启动另一个进程，即可测试。

package test5;

import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

import java.net.InetSocketAddress;
import java.nio.charset.Charset;
import java.util.Collection;
import java.util.Scanner;

public class MinaServer {

    private IoAcceptor acceptor;

    public boolean start(int SERVER_PORT) {
        try {
            acceptor = new NioSocketAcceptor();
            acceptor.getFilterChain().addLast("MinaServer_ProtocolCodecFilter", new ProtocolCodecFilter(new TextLineCodecFactory(Charset.forName("UTF-8"))));
            MinaServerHandler minaServerHandler = new MinaServerHandler();
            acceptor.setHandler(minaServerHandler);
            acceptor.getSessionConfig().setReadBufferSize(2048);
            acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 30);
            acceptor.bind(new InetSocketAddress(SERVER_PORT));
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

        return true;
    }

    public void close(){
        acceptor.dispose();
    }
}

package test5;

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;

import java.util.Collection;

public class MinaServerHandler extends IoHandlerAdapter {

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    private IoSession recentIoSession;

    @Override
    public void sessionCreated(IoSession session) {
        logger.info("Client:"  + session.getRemoteAddress());
    }

    @Override
    public void sessionOpened(IoSession session) {
        logger.info("Client:" + session.getRemoteAddress());
        recentIoSession = session;
        Collection<IoSession> ioSessionCollection = session.getService().getManagedSessions().values();
        String minaClientCountInfo = "MinaClient_Count:" + ioSessionCollection.size();
        String recentIoSessionInfo = "recentIoSession:" + recentIoSession.getRemoteAddress();
        for (IoSession ioSession : ioSessionCollection) {
            ioSession.write(minaClientCountInfo + " " + recentIoSessionInfo);
        }
    }

    @Override
    public void sessionClosed(IoSession session) {
        logger.info("Client:" + session.getRemoteAddress());
    }

    @Override
    public void messageReceived(IoSession session, Object message) {
        logger.info("Client:" + session.getRemoteAddress() + " message:" + message.toString().trim());
    }

    @Override
    public void sessionIdle(IoSession session, IdleStatus status) {
        logger.info("Server:" + session.getRemoteAddress() + " status:" + status.toString());
    }

    @Override
    public void exceptionCaught(IoSession session, Throwable cause) {
        logger.info("Client:" + session.getRemoteAddress() + " cause:" + cause.getMessage());
    }

}  

package test5;

import com.google.gson.Gson;
import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.core.future.CloseFuture;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.SocketConnector;
import org.apache.mina.transport.socket.nio.NioSocketConnector;

import java.net.InetSocketAddress;
import java.nio.charset.Charset;
import java.util.Scanner;

public class MinaClient {

    private static final int OWN_SERVER_PORT = 33220;
    private static final int ANOTHER_SERVER_PORT = 33221;

    private SocketConnector connector;
    private ConnectFuture future;
    private IoSession session;

    public static void main(String[] args) {
        MinaClient minaClient = new MinaClient();
        if (minaClient.connect()) {
            Scanner scanner = new Scanner(System.in);
            while (scanner.hasNext()) {
                // write(Object object);会使messageSent(IoSession session , Object message)执行
                minaClient.session.write(scanner.next());
            }
        }
    }

    public boolean connect() {
        try {
            connector = new NioSocketConnector();
            DefaultIoFilterChainBuilder chain = connector.getFilterChain();
            chain.addLast("MinaClient_ProtocolCodecFilter", new ProtocolCodecFilter(new TextLineCodecFactory(Charset.forName("UTF-8"))));
            MinaClientHandler minaClientHandler = new MinaClientHandler();
            connector.setHandler(minaClientHandler);
            connector.setConnectTimeoutMillis(5000);
            connector.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 30);
            Thread thread = new Thread(() -> {
                while (future == null || !future.isConnected()) {
                    future = connector.connect(new InetSocketAddress("localhost", ANOTHER_SERVER_PORT));
                    future.awaitUninterruptibly();
                }

                session = future.getSession();
            });
            thread.setName("connectorThread");
            thread.start();
            MinaServer minaServer = new MinaServer();
            minaServer.start(OWN_SERVER_PORT);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

        return true;
    }

    public boolean close() {
        CloseFuture future = session.getCloseFuture();
        future.awaitUninterruptibly(1000);
        connector.dispose();
        return true;
    }
}

package test5;

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;

public class MinaClientHandler extends IoHandlerAdapter {

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    @Override
    public void sessionCreated(IoSession session) {
        logger.info("Server:" + session.getRemoteAddress());
    }

    @Override
    public void sessionOpened(IoSession session) {
        logger.info("Server:" + session.getRemoteAddress());
    }

    @Override
    public void sessionClosed(IoSession session) {
        logger.info("Server:" + session.getRemoteAddress());
    }

    @Override
    public void messageSent(IoSession session, Object message) {
        logger.info("Server:" + session.getRemoteAddress() + " message:" + message.toString());
    }

    @Override
    public void sessionIdle(IoSession session, IdleStatus status) {
        logger.info("Server:" + session.getRemoteAddress() + " status:" + status.toString());
    }

    @Override
    public void exceptionCaught(IoSession session, Throwable cause) {
        logger.info("Server:" + session.getRemoteAddress() + " cause:" + cause.getMessage());
    }
}