netty心跳检测

编程语言 2018-05-16 10:32:34 阅读次数: 2 
package bhz.netty.heartBeat;

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;

public class Client {

	
	public static void main(String[] args) throws Exception{
		
		EventLoopGroup group = new NioEventLoopGroup();
		Bootstrap b = new Bootstrap();
		b.group(group)
		 .channel(NioSocketChannel.class)
		 .handler(new ChannelInitializer<SocketChannel>() {
			@Override
			protected void initChannel(SocketChannel sc) throws Exception {
				sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
				sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
				sc.pipeline().addLast(new ClienHeartBeattHandler());
			}
		});
		
		ChannelFuture cf = b.connect("127.0.0.1", 8765).sync();

		cf.channel().closeFuture().sync();
		group.shutdownGracefully();
	}
}

package bhz.netty.heartBeat;

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

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

import org.hyperic.sigar.CpuPerc;
import org.hyperic.sigar.Mem;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.Swap;


public class ClienHeartBeattHandler extends ChannelHandlerAdapter {

    private ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
    
    private ScheduledFuture<?> heartBeat;
	//主动向服务器发送认证信息
    private InetAddress addr ;
    
    private static final String SUCCESS_KEY = "auth_success_key";

	@Override
	public void channelActive(ChannelHandlerContext ctx) throws Exception {
		addr = InetAddress.getLocalHost();
        String ip = addr.getHostAddress();
		String key = "1234";
		//证书
		String auth = ip + "," + key;
		ctx.writeAndFlush(auth);
	}
	
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    	try {
        	if(msg instanceof String){
        		String ret = (String)msg;
        		if(SUCCESS_KEY.equals(ret)){
        	    	// 握手成功，主动发送心跳消息
        	    	this.heartBeat = this.scheduler.scheduleWithFixedDelay(new HeartBeatTask(ctx), 0, 2, TimeUnit.SECONDS);
        		    System.out.println(msg);    			
        		}
        		else {
        			System.out.println(msg);
        		}
        	}
		} finally {
			ReferenceCountUtil.release(msg);
		}
    }

    private class HeartBeatTask implements Runnable {
    	private final ChannelHandlerContext ctx;

		public HeartBeatTask(final ChannelHandlerContext ctx) {
		    this.ctx = ctx;
		}
	
		@Override
		public void run() {
			try {
			    RequestInfo info = new RequestInfo();
			    //ip
			    info.setIp(addr.getHostAddress());
		        Sigar sigar = new Sigar();
		        //cpu prec
		        CpuPerc cpuPerc = sigar.getCpuPerc();
		        HashMap<String, Object> cpuPercMap = new HashMap<String, Object>();
		        cpuPercMap.put("combined", cpuPerc.getCombined());
		        cpuPercMap.put("user", cpuPerc.getUser());
		        cpuPercMap.put("sys", cpuPerc.getSys());
		        cpuPercMap.put("wait", cpuPerc.getWait());
		        cpuPercMap.put("idle", cpuPerc.getIdle());
		        // memory
		        Mem mem = sigar.getMem();
				HashMap<String, Object> memoryMap = new HashMap<String, Object>();
				memoryMap.put("total", mem.getTotal() / 1024L);
				memoryMap.put("used", mem.getUsed() / 1024L);
				memoryMap.put("free", mem.getFree() / 1024L);
				info.setCpuPercMap(cpuPercMap);
			    info.setMemoryMap(memoryMap);
			    ctx.writeAndFlush(info);
			    
			} catch (Exception e) {
				e.printStackTrace();
			}
		}

	    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
	    	cause.printStackTrace();
			if (heartBeat != null) {
			    heartBeat.cancel(true);
			    heartBeat = null;
			}
			ctx.fireExceptionCaught(cause);
	    }
	    
	}
}

package bhz.netty.heartBeat;

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;

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<SocketChannel>() {
			protected void initChannel(SocketChannel sc) throws Exception {
				sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
				sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
				sc.pipeline().addLast(new ServerHeartBeatHandler());
			}
		});
		
		ChannelFuture cf = b.bind(8765).sync();
		
		cf.channel().closeFuture().sync();
		pGroup.shutdownGracefully();
		cGroup.shutdownGracefully();
		
	}
}

package bhz.netty.heartBeat;

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

import java.util.HashMap;

public class ServerHeartBeatHandler extends ChannelHandlerAdapter {
    
	/** key:ip value:auth */
	private static HashMap<String, String> AUTH_IP_MAP = new HashMap<String, String>();
	private static final String SUCCESS_KEY = "auth_success_key";
	
	static {
		AUTH_IP_MAP.put("192.168.1.194", "1234");
	}
	
	private boolean auth(ChannelHandlerContext ctx, Object msg){
			//System.out.println(msg);
			String [] ret = ((String) msg).split(",");
			String auth = AUTH_IP_MAP.get(ret[0]);
			if(auth != null && auth.equals(ret[1])){
				ctx.writeAndFlush(SUCCESS_KEY);
				return true;
			} else {
				ctx.writeAndFlush("auth failure !").addListener(ChannelFutureListener.CLOSE);
				return false;
			}
	}
	
	@Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
		if(msg instanceof String){
			auth(ctx, msg);
		} else if (msg instanceof RequestInfo) {
			
			RequestInfo info = (RequestInfo) msg;
			System.out.println("--------------------------------------------");
			System.out.println("当前主机ip为: " + info.getIp());
			System.out.println("当前主机cpu情况: ");
			HashMap<String, Object> cpu = info.getCpuPercMap();
			System.out.println("总使用率: " + cpu.get("combined"));
			System.out.println("用户使用率: " + cpu.get("user"));
			System.out.println("系统使用率: " + cpu.get("sys"));
			System.out.println("等待率: " + cpu.get("wait"));
			System.out.println("空闲率: " + cpu.get("idle"));
			
			System.out.println("当前主机memory情况: ");
			HashMap<String, Object> memory = info.getMemoryMap();
			System.out.println("内存总量: " + memory.get("total"));
			System.out.println("当前内存使用量: " + memory.get("used"));
			System.out.println("当前内存剩余量: " + memory.get("free"));
			System.out.println("--------------------------------------------");
			
			ctx.writeAndFlush("info received!");
		} else {
			ctx.writeAndFlush("connect failure!").addListener(ChannelFutureListener.CLOSE);
		}
    }


}

package bhz.netty.heartBeat;

import java.io.Serializable;
import java.util.HashMap;

public class RequestInfo implements Serializable {

	private String ip ;
	private HashMap<String, Object> cpuPercMap ;
	private HashMap<String, Object> memoryMap;
	//.. other field
	
	public String getIp() {
		return ip;
	}
	public void setIp(String ip) {
		this.ip = ip;
	}
	public HashMap<String, Object> getCpuPercMap() {
		return cpuPercMap;
	}
	public void setCpuPercMap(HashMap<String, Object> cpuPercMap) {
		this.cpuPercMap = cpuPercMap;
	}
	public HashMap<String, Object> getMemoryMap() {
		return memoryMap;
	}
	public void setMemoryMap(HashMap<String, Object> memoryMap) {
		this.memoryMap = memoryMap;
	}
	
	
}

package bhz.netty.heartBeat;

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 * 1024 * 1);
		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;
    }
}

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