Disruptor并发框架

Disruptor：高效的并发组件（框架），可以认为是没有锁的生产者消费者模型，所以效率高，内部使用RingBuffer机制，做到无锁并发，


代码示例
Disruptor服务器

package com.gbcom.frame.disruptor;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import com.lmax.disruptor.BlockingWaitStrategy;
import com.lmax.disruptor.EventTranslatorThreeArg;
import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.dsl.Disruptor;
import com.lmax.disruptor.dsl.ProducerType;

/**
 * DisruptorServer，封装了Disruptor服务，提供 start ，stop，注册消费者，提供发布方法等功能
 * 
 * 
 * 该类 可以直接使用，并且独立于业务。该类描述了 Disruptor的核心
 * @author syz
 * @date 2014-10-17
 * @version v1.0.0
 * @see com.gbcom.frame.disruptor.DisruptorServer
 */
public class DisruptorServer {
	private static final int BUFFER_SIZE = 4;
	private   Disruptor<FrameEvent> disruptor;
	private EventProcessor processor =  new EventProcessor();
	
	/**
	 * 数据的封装；封装成 FrameEvent
	 */
	private static final EventTranslatorThreeArg<FrameEvent, String, Integer, byte[]>  TRANSLATOR = new  EventTranslatorThreeArg<FrameEvent, String, Integer, byte[]>(){

		@Override
		public void translateTo(FrameEvent event, long seq, String ip,
				Integer port, byte[] data) {
			event.setData(data);
			event.setIp(ip);
			event.setPort(port);
		}
		
	};
	
	private static class DisruptorHolder{
		private static final DisruptorServer INSTANCE = new DisruptorServer();
	}
	
	public static DisruptorServer getInstance(){
		return DisruptorHolder.INSTANCE;
	}
	
	
	public void start(){
		initDisruptor();
	}


	private void initDisruptor() {
		ExecutorService executor = Executors.newCachedThreadPool(); //线程池，构建disruptor需要
		disruptor = new Disruptor<FrameEvent>(FrameEvent.ENENT_FACTORY, BUFFER_SIZE, executor, ProducerType.SINGLE, new BlockingWaitStrategy());//构建disruptor
		disruptor.handleEventsWith(new FrameEventHandler<FrameEvent>(processor));//注册一个消费者，消费者事先注册好
		disruptor.start();//开启并发服务
		disruptor.getRingBuffer();//启动轮转，轮转的size 在构建disruptor指定，基于该机制实现的无锁 高并发
	}
	
	/**
	 * 生产者，发布一个消息: (DisruptorServer.onData)
	 * @param ip
	 * @param port
	 * @param data
	 */
	public void onData(String ip,Integer port,byte[] data){
		disruptor.getRingBuffer().publishEvent(TRANSLATOR,ip,port,data);
	}
	
	/**
	 * 生产错误的处理。直接调用，非添加到队列。
	 * @param t
	 */
	public void onError(Throwable t){
		if(processor !=null){
			processor.onError(t);
		}
	}
}

disruptor 框架的事件

package com.gbcom.frame.disruptor;

import java.util.Arrays;

import com.lmax.disruptor.EventFactory;

/**
 * disruptor 框架的事件。POJO，disruptor 需要提供factory，
 * @author syz
 * @date 2014-10-17
 * @version v1.0.0
 * @see com.gbcom.frame.disruptor.FrameEvent
 */
public class FrameEvent
{
    private byte[] data;
    private String ip;
    private int port;

    public byte[] getData() {
        return data;
    }

    public void setData(byte[] data) {
        this.data = data;
    }

    public String getIp() {
        return ip;
    }

    public void setIp(String ip) {
        this.ip = ip;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    
    /**
     * 工厂类
     */
    public static final EventFactory<FrameEvent> ENENT_FACTORY = new EventFactory<FrameEvent> (){
		
		@Override
		public FrameEvent newInstance() {
			// TODO Auto-generated method stub
			return new FrameEvent();
		}
	};

	@Override
	public String toString() {
		return "FrameEvent [data=" + Arrays.toString(data) + ", ip=" + ip
				+ ", port=" + port + "]";
	}
    
    
}

FrameEventHandler实现EventHandler接口，消费者处理

package com.gbcom.frame.disruptor;

import com.lmax.disruptor.EventHandler;

/**
 * 消费者处理，，实现EventHandler接口
 * @author SYZ
 * @date 2016-11-3 下午02:08:32
 * @version 1.0.0
 * @see com.gbcom.frame.disruptor.FrameEventHandler
 */
public class FrameEventHandler<FrameEvent> implements EventHandler<FrameEvent>{
	private EventProcessor processor ; 
	
	
	protected FrameEventHandler(EventProcessor processor) {
		super();
		this.processor = processor;
	}


	@Override
	public void onEvent(FrameEvent event, long seq, boolean endOfBatch)
			throws Exception {
		processor.onReceive((com.gbcom.frame.disruptor.FrameEvent) event);
	}

}

消费者：真正的消息处理

package com.gbcom.frame.disruptor;

import java.io.UnsupportedEncodingException;

import org.apache.commons.io.Charsets;

import com.gbcom.frame.disruptor.snetty.UdpHandler;

/**
 * 消费者：真正的消息处理
 * @author syz
 * @date 2014-10-17
 * @version v1.0.0
 * @see com.gbcom.frame.disruptor.EventProcessor
 */
public class EventProcessor implements UdpHandler{
	public void onReceive(FrameEvent event){
		System.out.println("receive is success :"+event);
		
		try {
			NatTabManager.getInstance().put(new String(event.getData(),"utf-8"), event);
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
		event = NatTabManager.getInstance().getNat(new String(event.getData(),Charsets.UTF_8));
		
		//System.out.println(HttpClientUtil.get("http://"+event.getIp()+":"+event.getPort()));
		
	}
	
	
	public void onError(Throwable t ){

		System.out.println("receive is false :" + t);
	
	}
	
	
	
	public static void main(String args[]){
		System.out.println(HttpClientUtil.get("http://127.0.0.1:80"));
		
	}


	@Override
	public void onReceive(String ip, int port, byte[] data) {
		
	}
	
}

NET功能，，跟Disruptor框架无关，上层应用

package com.gbcom.frame.disruptor;

import java.util.HashMap;
import java.util.Map;
/**
 * NET功能，，跟Disruptor框架无关，
 * @author SYZ
 * @date 2016-11-3 下午02:09:14
 * @version 1.0.0
 * @see com.gbcom.frame.disruptor.NatTabManager
 */
public class NatTabManager {

	private Map<String,FrameEvent>  natTab = new HashMap<String,FrameEvent>();
	private static NatTabManager intance = new NatTabManager();
	
	
	public static NatTabManager getInstance(){
		return intance;
	}
	
	
	
	public void put(String key,FrameEvent value){
		natTab.put(key, value);
	}
	
	
	public Map getNatTab(){
		return natTab;
	}
	
	
	public FrameEvent getNat(String key){
		return natTab.get(key);
	}
	
	
	
}

客户端

package com.gbcom.frame.disruptor;

/**
 * 
 * 
 * Disruptor：高效的并发组件（框架），可以认为是没有锁的生产者消费者模型，所以效率高
 * 
 * 该例子完成Disruptor功能，且具有一定的使用价值，Disruptor独立于业务，，，DisruptorServer
 * 
 * 高效的生产者消费者模型：DisruptorServer
 * 
 * @author SunYanzheng
 * @date 2014-10-17
 * @version v1.0.0
 * @see com.gbcom.frame.disruptor.DisClient
 */
public class DisClient {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		DisruptorServer.getInstance().start(); //初始化服务
		
		
		DisruptorServer.getInstance().onData("10.1.1.1", 162, "hello".getBytes());//调用onData 发布数据
	}

}

完整代码下载参考附件