Disruptor是什么可以阅读《高性能线程间队列DISRUPTOR简介》一文，下面重点讲讲在实际应用中如何去使用Disruptor。

项目结构如下：

CreateReqEvent.java

package com.bijian.study;

import com.lmax.disruptor.EventFactory;

public class CreateReqEvent {

private String reqStr;

public String getReqStr() {

return reqStr;

}

public void setReqStr(String reqStr) {

this.reqStr = reqStr;

}

private static class Factory implements EventFactory {

@Override

public CreateReqEvent newInstance() {

return new CreateReqEvent();

}

}

public static final CreateReqEvent.Factory FACTORY = new CreateReqEvent.Factory();

}

CreateReqEventHandler.java

package com.bijian.study;

import java.lang.invoke.MethodHandles;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.lmax.disruptor.EventHandler;

public class CreateReqEventHandler implements EventHandler {

private static Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

@Override

public void onEvent(CreateReqEvent event, long sequence, boolean endOfBatch) throws Exception {

log.info("on event:{}", event.getReqStr());

}

}

CreateReqEventTranslator.java

package com.bijian.study;

import com.lmax.disruptor.EventTranslator;

public class CreateReqEventTranslator implements EventTranslator {

private String reqString;

public String getReqString() {

return reqString;

}

public void setReqString(String reqString) {

this.reqString = reqString;

}

@Override

public void translateTo(CreateReqEvent event, long sequence) {

event.setReqStr(reqString);

}

}

ReqEventUtil.java

package com.bijian.study;

import java.lang.invoke.MethodHandles;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.lmax.disruptor.BlockingWaitStrategy;

import com.lmax.disruptor.EventHandler;

import com.lmax.disruptor.dsl.Disruptor;

import com.lmax.disruptor.dsl.ProducerType;

public class ReqEventUtil {

private static Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

private static volatile Disruptor disruptor;

private static ExecutorService executor;

//启动处理线程

static {

int ringBufferSize = 256 * 256; // RingBuffer 大小=65536，必须是 2的 N次方；

executor = Executors.newFixedThreadPool(4*4);

disruptor = new Disruptor(CreateReqEvent.FACTORY, ringBufferSize, executor, ProducerType.MULTI,new BlockingWaitStrategy());

EventHandler eventHandler = new CreateReqEventHandler();

disruptor.handleEventsWith(eventHandler);

disruptor.start();

}

public static void push(String reqString){

try {

log.info("push create reqString event:{}", reqString);

CreateReqEventTranslator translator = new CreateReqEventTranslator();

translator.setReqString(reqString);

disruptor.publishEvent(translator);

}catch (Exception e){

log.error("push CreateOrderEvent error:",e);

}

}

/**

* 停止处理

*/

public static void shutdown(){

log.info("shutdown now...");

if(disruptor != null) {

disruptor.shutdown();

}

if(executor != null) {

executor.shutdown();

}

}

}

测试类Main.java

package com.bijian.test;

import java.lang.invoke.MethodHandles;

import java.util.Scanner;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.bijian.study.ReqEventUtil;

public class Main {

private static Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

while(sc.hasNext()) {

String reqStr = sc.nextLine();

log.info("输入的信息:" + reqStr);

if(reqStr.equals("exit")) {

ReqEventUtil.shutdown();

break;

}else {

ReqEventUtil.push(reqStr);

}

}

}

}

运行结果：

test

2018-12-24 23:12:26.337 [main] INFO Main.main(Main.java:20)[][][] - 输入的信息:test

2018-12-24 23:12:26.370 [main] INFO ReqEventUtil.push(ReqEventUtil.java:35)[][][] - push create reqString event:test

2018-12-24 23:12:26.371 [pool-2-thread-1] INFO CreateReqEventHandler.onEvent(CreateReqEventHandler.java:16)[][][] - on event:test

abc

2018-12-24 23:12:28.323 [main] INFO Main.main(Main.java:20)[][][] - 输入的信息:abc

2018-12-24 23:12:28.323 [main] INFO ReqEventUtil.push(ReqEventUtil.java:35)[][][] - push create reqString event:abc

2018-12-24 23:12:28.324 [pool-2-thread-1] INFO CreateReqEventHandler.onEvent(CreateReqEventHandler.java:16)[][][] - on event:abc

xyz

2018-12-24 23:12:30.628 [main] INFO Main.main(Main.java:20)[][][] - 输入的信息:xyz

2018-12-24 23:12:30.628 [main] INFO ReqEventUtil.push(ReqEventUtil.java:35)[][][] - push create reqString event:xyz

2018-12-24 23:12:30.628 [pool-2-thread-1] INFO CreateReqEventHandler.onEvent(CreateReqEventHandler.java:16)[][][] - on event:xyz

exit

2018-12-24 23:12:34.032 [main] INFO Main.main(Main.java:20)[][][] - 输入的信息:exit

2018-12-24 23:12:34.033 [main] INFO ReqEventUtil.shutdown(ReqEventUtil.java:49)[][][] - shutdown now...