disruptor 多生产者多消费者实战 四

一、创建event类 Order

public class Order {

    private String id;
    private String name;
    private double price;

    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 double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

二、创建消费者类 Consumer

import com.lmax.disruptor.WorkHandler;

import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;

public class Consumer implements WorkHandler<Order> {

    private String consumerId;

    private static AtomicInteger count = new AtomicInteger(0);

    private Random random = new Random();

    public Consumer(String consumerId) {
        this.consumerId = consumerId;
    }

    @Override
    public void onEvent(Order event) throws Exception {
        Thread.sleep(1 * random.nextInt(5));
        System.out.println("当前消费者：" + this.consumerId + ",消费信息ID:"+event.getId());
        count.incrementAndGet();
    }

    public int getCount() {
        return count.get();
    }
}

三、创建生产者类 Producer

import com.lmax.disruptor.RingBuffer;

public class Producer {

    private RingBuffer<Order> ringBuffer;

    public Producer(RingBuffer<Order> ringBuffer) {
        this.ringBuffer = ringBuffer;
    }

    public void sendData(String data) {
        long sequnce = ringBuffer.next();

        try {
            Order order = ringBuffer.get(sequnce);
            order.setId(data);
        } finally {
            ringBuffer.publish(sequnce);
        }
    }

四、创建测试类

import com.lmax.disruptor.*;
import com.lmax.disruptor.dsl.ProducerType;

import java.util.UUID;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;

public class TestMain {
    public static void main(String[] args) throws Exception{

        //1 创建ringbuffer
        RingBuffer<Order> ringBuffer = RingBuffer.create(ProducerType.MULTI,
                new EventFactory<Order>() {
                    @Override
                    public Order newInstance() {
                        return new Order();
                    }
                },
                1024 * 1024,
                new YieldingWaitStrategy());

        //2 通过ringbuffer 创建一个屏障
        SequenceBarrier sequenceBarrier = ringBuffer.newBarrier();

        //3 创建多个消费者
        Consumer[] consumers = new Consumer[10];
        for (int i = 0; i < consumers.length; i++) {
            consumers[i] = new Consumer("C" + i);
        }

        //4 构建多消费者工作池
        WorkerPool<Order> workerPool = new WorkerPool<Order>(
                ringBuffer,
                sequenceBarrier,
                new EventExceptionHandler(),
                consumers);

        //5 设置多个消费者的sequence 序号用于单独统计消费进度，并且设置到ringbuffer中
        ringBuffer.addGatingSequences(workerPool.getWorkerSequences());

        //6 启动workPool
        workerPool.start(Executors.newFixedThreadPool(10));

        //设置异步生产 100个生产者
        CountDownLatch latch = new CountDownLatch(1);

        for (int i = 0; i < 100; i++) {
            Producer producer = new Producer(ringBuffer);
            new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        latch.await();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                    for (int j = 0; j < 100; j++) {
                        producer.sendData(UUID.randomUUID().toString());
                    }
                }
            }).start();
        }

        Thread.sleep(2000);
        System.out.println("--------线程创建完毕，开始生产数据----------");
        latch.countDown();

        Thread.sleep(10000);
        System.out.println("消费者处理的任务总数：" + consumers[0].getCount());
    }

    //创建exception类
    static class EventExceptionHandler implements ExceptionHandler<Order> {

        @Override
        public void handleEventException(Throwable ex, long sequence, Order event) {

        }

        @Override
        public void handleOnStartException(Throwable ex) {

        }

        @Override
        public void handleOnShutdownException(Throwable ex) {

        }
    }
}