netty 超时重连列子

package bhz.netty.runtime;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.timeout.ReadTimeoutHandler;

import java.util.concurrent.TimeUnit;


/**
 * Best Do It
 */
public class Client {
	
	private static class SingletonHolder {
		static final Client instance = new Client();
	}
	
	public static Client getInstance(){
		return SingletonHolder.instance;
	}
	
	private EventLoopGroup group;
	private Bootstrap b;
	private ChannelFuture cf ;
	
	private Client(){
			group = new NioEventLoopGroup();
			b = new Bootstrap();
			b.group(group)
			 .channel(NioSocketChannel.class)
			 .handler(new LoggingHandler(LogLevel.INFO))
			 .handler(new ChannelInitializer() {
					@Override
					protected void initChannel(SocketChannel sc) throws Exception {
						sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
						sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
						//超时handler（当服务器端与客户端在指定时间以上没有任何进行通信，则会关闭响应的通道，主要为减小服务端资源占用）
						//5秒要跟服务器设置的一致
						sc.pipeline().addLast(new ReadTimeoutHandler(5)); 
						sc.pipeline().addLast(new ClientHandler());
					}
		    });
	}
	
	public void connect(){
		try {
			this.cf = b.connect("127.0.0.1", 8765).sync();
			System.out.println("远程服务器已经连接, 可以进行数据交换..");				
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public ChannelFuture getChannelFuture(){
		
		if(this.cf == null){
			this.connect();
		}
		if(!this.cf.channel().isActive()){
			this.connect();
		}
		
		return this.cf;
	}
	
	public static void main(String[] args) throws Exception{
		final Client c = Client.getInstance();

		
		ChannelFuture cf = c.getChannelFuture();
		for(int i = 1; i <= 3; i++ ){
			Request request = new Request();
			request.setId("" + i);
			request.setName("pro" + i);
			request.setRequestMessage("数据信息" + i);
			cf.channel().writeAndFlush(request);
			TimeUnit.SECONDS.sleep(4);
		}
		//超过五秒之后就断开连接
		cf.channel().closeFuture().sync();//程序阻塞在这里，断开连接时才继续往下走
		
		//断开之后，重连服务器再发送
		new Thread(new Runnable() {
			@Override
			public void run() {
				try {
					System.out.println("进入子线程...");
					//重连
					ChannelFuture cf = c.getChannelFuture();
					System.out.println(cf.channel().isActive());
					System.out.println(cf.channel().isOpen());
					
					//再次发送数据
					Request request = new Request();
					request.setId("" + 4);
					request.setName("pro" + 4);
					request.setRequestMessage("数据信息" + 4);
					cf.channel().writeAndFlush(request);					
					cf.channel().closeFuture().sync();
					System.out.println("子线程结束.");
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}).start();
		
		System.out.println("断开连接,主线程结束..");
		
	}
	
	
	
}

 

package bhz.netty.runtime;

import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.ReferenceCountUtil;

public class ClientHandler extends ChannelHandlerAdapter{
	
	@Override
	public void channelActive(ChannelHandlerContext ctx) throws Exception {

	}

	@Override
	public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
		try {
			Response resp = (Response)msg;
			System.out.println("Client : " + resp.getId() + ", " + resp.getName() + ", " + resp.getResponseMessage());			
		} finally {
			ReferenceCountUtil.release(msg);
		}
	}

	@Override
	public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
		
	}

	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
		ctx.close();
	}
	
}

 

package bhz.netty.runtime;

import io.netty.handler.codec.marshalling.DefaultMarshallerProvider;
import io.netty.handler.codec.marshalling.DefaultUnmarshallerProvider;
import io.netty.handler.codec.marshalling.MarshallerProvider;
import io.netty.handler.codec.marshalling.MarshallingDecoder;
import io.netty.handler.codec.marshalling.MarshallingEncoder;
import io.netty.handler.codec.marshalling.UnmarshallerProvider;

import org.jboss.marshalling.MarshallerFactory;
import org.jboss.marshalling.Marshalling;
import org.jboss.marshalling.MarshallingConfiguration;

/**
 * Marshalling工厂
 * @author（alienware）
 * @since 2014-12-16
 */
public final class MarshallingCodeCFactory {

    /**
     * 创建Jboss Marshalling解码器MarshallingDecoder
     * @return MarshallingDecoder
     */
    public static MarshallingDecoder buildMarshallingDecoder() {
    	//首先通过Marshalling工具类的精通方法获取Marshalling实例对象 参数serial标识创建的是java序列化工厂对象。
		final MarshallerFactory marshallerFactory = Marshalling.getProvidedMarshallerFactory("serial");
		//创建了MarshallingConfiguration对象，配置了版本号为5 
		final MarshallingConfiguration configuration = new MarshallingConfiguration();
		configuration.setVersion(5);
		//根据marshallerFactory和configuration创建provider
		UnmarshallerProvider provider = new DefaultUnmarshallerProvider(marshallerFactory, configuration);
		//构建Netty的MarshallingDecoder对象，俩个参数分别为provider和单个消息序列化后的最大长度
		MarshallingDecoder decoder = new MarshallingDecoder(provider, 1024);
		return decoder;
    }

    /**
     * 创建Jboss Marshalling编码器MarshallingEncoder
     * @return MarshallingEncoder
     */
    public static MarshallingEncoder buildMarshallingEncoder() {
		final MarshallerFactory marshallerFactory = Marshalling.getProvidedMarshallerFactory("serial");
		final MarshallingConfiguration configuration = new MarshallingConfiguration();
		configuration.setVersion(5);
		MarshallerProvider provider = new DefaultMarshallerProvider(marshallerFactory, configuration);
		//构建Netty的MarshallingEncoder对象，MarshallingEncoder用于实现序列化接口的POJO对象序列化为二进制数组
		MarshallingEncoder encoder = new MarshallingEncoder(provider);
		return encoder;
    }
}

 

package bhz.netty.runtime;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.timeout.ReadTimeoutHandler;

public class Server {

	public static void main(String[] args) throws Exception{
		
		EventLoopGroup pGroup = new NioEventLoopGroup();
		EventLoopGroup cGroup = new NioEventLoopGroup();
		
		ServerBootstrap b = new ServerBootstrap();
		b.group(pGroup, cGroup)
		 .channel(NioServerSocketChannel.class)
		 .option(ChannelOption.SO_BACKLOG, 1024)
		 //设置日志
		 .handler(new LoggingHandler(LogLevel.INFO))
		 .childHandler(new ChannelInitializer() {
			protected void initChannel(SocketChannel sc) throws Exception {
				sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
				sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
				//五秒后没有连接，断开。
				sc.pipeline().addLast(new ReadTimeoutHandler(5)); 
				sc.pipeline().addLast(new ServerHandler());
			}
		});
		
		ChannelFuture cf = b.bind(8765).sync();
		
		cf.channel().closeFuture().sync();
		pGroup.shutdownGracefully();
		cGroup.shutdownGracefully();
		
	}
}

 

package bhz.netty.runtime;

import java.io.Serializable;

public class Response implements Serializable{
	
	private static final long serialVersionUID = 1L;
	
	private String id;
	private String name;
	private String responseMessage;
	
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getResponseMessage() {
		return responseMessage;
	}
	public void setResponseMessage(String responseMessage) {
		this.responseMessage = responseMessage;
	}
	

}

 

package bhz.netty.runtime;

import java.io.Serializable;

public class Request implements Serializable{

	private static final long  SerialVersionUID = 1L;
	
	private String id ;
	private String name ;
	private String requestMessage ;
	
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getRequestMessage() {
		return requestMessage;
	}
	public void setRequestMessage(String requestMessage) {
		this.requestMessage = requestMessage;
	}


}

 

package bhz.netty.runtime;

import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;

public class ServerHandler extends ChannelHandlerAdapter{

	@Override
	public void channelActive(ChannelHandlerContext ctx) throws Exception {

	}

	@Override
	public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
		Request request = (Request)msg;
		System.out.println("Server : " + request.getId() + ", " + request.getName() + ", " + request.getRequestMessage());
		Response response = new Response();
		response.setId(request.getId());
		response.setName("response" + request.getId());
		response.setResponseMessage("响应内容" + request.getId());
		ctx.writeAndFlush(response);//.addListener(ChannelFutureListener.CLOSE);
	}

	@Override
	public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
		
	}

	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
		ctx.close();
	}

	
	
}