多線程（三）協(xié)作篇之生產(chǎn)者消費(fèi)者模型

使用多個(gè)線程除了并發(fā)進(jìn)行提高一個(gè)大任務(wù)或者多個(gè)子任務(wù)的執(zhí)行效率，多線程之間還存在協(xié)作完成任務(wù)，共同協(xié)作完成任務(wù)涉及到多線程之間的通訊。生產(chǎn)者消費(fèi)者模型就是典型的多線程協(xié)作的應(yīng)用

是什么：

什么是線程間的協(xié)作

  • 多線程協(xié)作即多線程之間通過(guò)多線程通訊技術(shù)，實(shí)現(xiàn)多線程按照特定順序共同協(xié)作完成一項(xiàng)任務(wù)。

怎么用：

多線程協(xié)作用在哪

  • 多線程協(xié)作場(chǎng)景有多種使用場(chǎng)景，典型的有線程通過(guò)通知機(jī)制交替進(jìn)行的生產(chǎn)者消費(fèi)者模型：生產(chǎn)者生產(chǎn)物品，生產(chǎn)完通知消費(fèi)者進(jìn)行消費(fèi)，消費(fèi)者收到通知后進(jìn)行消費(fèi)，消費(fèi)完再通知生產(chǎn)者進(jìn)行生產(chǎn)；
  • 多個(gè)線程共同等待一齊完成后集體進(jìn)行下一步，以此循環(huán)共同推進(jìn)的循環(huán)路障模型
  • 某個(gè)線程任務(wù)等待多個(gè)線程都就緒后才開(kāi)始的倒計(jì)時(shí)門閘模型

用什么實(shí)現(xiàn)生產(chǎn)者消費(fèi)者模型

  • 使用objcet的自帶的wait，notify，notifyAll方法進(jìn)行線程間的通知等待機(jī)制，需要注意，這幾個(gè)方法必須在synchronized的同步代碼塊的范圍內(nèi)使用，否則會(huì)拋異常。
public class ProduceConsumeDemo {
    public static void main(String[] args) {
        List<String> container=new ArrayList<>();
        ExecutorService executorService= Executors.newFixedThreadPool(2);
        executorService.submit(new Consumer(container));
        executorService.submit(new Producer(container));
        executorService.shutdown();
    }
}
@Slf4j
class Consumer implements Runnable{
    int money=0;
    private List<String> container;
    public Consumer(List<String> container){
        this.container=container;
    }
    void consumeFood() throws Exception{
        while (money<15){
            synchronized (container){
                log.debug("container owner is consumer,money is {}",money);
                if(container.size()==0){
                    container.wait();
                }
                Iterator it=container.iterator();
                while(it.hasNext()){
                    money++;
                    log.debug("wow,the {} is delicious！nice food！",it.next());
                    it.remove();
                }
                log.debug(" container is empty,it is time to cook!");
                container.notifyAll();
                log.debug("consume  notified continue");
            }
        }
        log.debug("consumer money cost =15,over");
    }

    @Override
    public void run() {
        try {
            consumeFood();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

@Slf4j
class Producer implements Runnable{
    private String[] dishes={"rice","beef","chicken","tomato","potato"};
    int money=0;
    private Random random=new Random();
    private List<String> container;
    public Producer(List<String> container){
        this.container=container;
    }
    void produceFood() throws Exception{
        while (money<15){
            synchronized (container){
                log.debug("container owner is  produce,money is {}",money);
                if(container.size()>=5){
                    container.wait();
                }
                while(container.size()<5){
                    String dish=dishes[random.nextInt(5)];
                    log.debug("new food is cooked,it is {}",dish);
                    container.add(dish);
                    money++;
                }
                log.debug(" container is full,it is time to eat");
                // 做完后喚醒其他
                container.notifyAll();
                log.debug("produce  notified continue");
            }
        }
        log.debug("producer money cost =15,over");
    }

    @Override
    public void run() {
        try {
            produceFood();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

打印如下：
19:54:05.007 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - container owner is consumer,money is 0
19:54:05.011 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - container owner is  produce,money is 0
19:54:05.011 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is rice
19:54:05.011 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is beef
19:54:05.011 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is potato
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is potato
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is tomato
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer -  container is full,it is time to eat
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - produce  notified continue
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - container owner is  produce,money is 5
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the rice is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the beef is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the potato is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the potato is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the tomato is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer -  container is empty,it is time to cook!
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - consume  notified continue
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - container owner is consumer,money is 5
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is tomato
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is chicken
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is chicken
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is tomato
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is rice
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer -  container is full,it is time to eat
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - produce  notified continue
19:54:05.012 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - container owner is  produce,money is 10
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the tomato is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the chicken is delicious！nice food！
19:54:05.012 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the chicken is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the tomato is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the rice is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer -  container is empty,it is time to cook!
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - consume  notified continue
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - container owner is consumer,money is 10
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is tomato
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is beef
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is rice
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is tomato
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - new food is cooked,it is tomato
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer -  container is full,it is time to eat
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - produce  notified continue
19:54:05.013 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.Producer - producer money cost =15,over
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the tomato is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the beef is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the rice is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the tomato is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - wow,the tomato is delicious！nice food！
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer -  container is empty,it is time to cook!
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - consume  notified continue
19:54:05.013 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.Consumer - consumer money cost =15,over
  • 使用并發(fā)隊(duì)列BlockingQueue，BlockingQueue本身就是為生產(chǎn)者消費(fèi)者模型設(shè)計(jì)的線程安全的并發(fā)容器，使用起來(lái)簡(jiǎn)單高效。
@Slf4j
public class ProduceConsumerQueueDemo {
    public static void main(String[] args) throws Exception{
        BlockingQueue<String> queue=new LinkedBlockingDeque<>(5);
        Random random=new Random();
        List<String> foods= Arrays.asList("beef","nice","meat","tomato","potato");
        ExecutorService executorService= Executors.newCachedThreadPool();
        CountDownLatch countDownLatch=new CountDownLatch(2);
        executorService.execute(()->{
            int i=0;
            String food;
            while(i<15){
                try {
                    food=queue.poll(10L, TimeUnit.SECONDS);
                    log.debug("delicious food，i like the {},size is {}",food,queue.size());
                    i++;
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            countDownLatch.countDown();
            log.debug("eat over!");
        });
        executorService.execute(()->{
            int i=0;
            String food;
            while(i<15){
                try {
                    food=foods.get(random.nextInt(5));
                    queue.offer(food,10L, TimeUnit.SECONDS);
                    log.debug("delicious food is cooked {},queue size is {}",food,queue.size());
                    i++;
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            countDownLatch.countDown();
            log.debug("cook over!");
        });
        countDownLatch.await();
        log.debug("main over!");
        executorService.shutdown();
    }
}
打印結(jié)果如下：
20:24:04.513 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked tomato,queue size is 1
20:24:04.513 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the tomato,size is 0
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the beef,size is 0
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked beef,queue size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked nice,queue size is 1
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the nice,size is 0
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked beef,queue size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked beef,queue size is 1
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the beef,size is 0
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked tomato,queue size is 2
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the beef,size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked beef,queue size is 2
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the tomato,size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked beef,queue size is 2
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the beef,size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked tomato,queue size is 2
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the beef,size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked nice,queue size is 2
20:24:04.516 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the tomato,size is 1
20:24:04.516 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked nice,queue size is 2
20:24:04.517 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked nice,queue size is 2
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the nice,size is 1
20:24:04.517 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked potato,queue size is 3
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the nice,size is 2
20:24:04.517 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked meat,queue size is 3
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the nice,size is 2
20:24:04.517 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food is cooked tomato,queue size is 3
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the potato,size is 2
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the meat,size is 1
20:24:04.517 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - cook over!
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - delicious food，i like the tomato,size is 0
20:24:04.517 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - eat over!
20:24:04.517 [main] DEBUG com.dz.demo.multiThread.ProduceConsumerQueueDemo - main over!
  • 使用LockSupport相關(guān)park與unpark方法，park方法使當(dāng)前線程需要一個(gè)令牌才能繼續(xù)（該令牌可以在park之前就被有或者park后被其他線程發(fā)放），unpark方法是給對(duì)應(yīng)線程發(fā)放一個(gè)令牌。
public class ProduceConsumeLockSupportDemo {
    public static void main(String[] args) throws Exception{
        List<String>container=new ArrayList<>(5);
        Map<String,Thread> threadMap=new ConcurrentHashMap<>();
        ExecutorService executorService= Executors.newFixedThreadPool(2);
        executorService.execute(new LockSupportProducer(threadMap,container));
        executorService.execute(new LockSupportConsumer(threadMap,container));
        executorService.shutdown();
    }
}

@Slf4j
class LockSupportProducer implements Runnable{
    private Map<String,Thread> threadMap;
    private List<String>container;
    public LockSupportProducer(Map<String,Thread> threadMap,List<String>container){
        this.threadMap=threadMap;
        this.container=container;
    }
    private  int money=0;
    private String[] dishes={"rice","beef","chicken","tomato","potato"};
    private Random random=new Random();
    @Override
    public void run() {
        threadMap.put("producer",Thread.currentThread());
        while(money<15){
            if(container.size()<5){
                String food=dishes[random.nextInt(5)];
                log.debug("cooking ,this time food is {},time is {}",food,money);
                container.add(food);
                money++;
            }else {
                LockSupport.unpark(threadMap.get("consumer"));
                LockSupport.park();
            }
        }
        LockSupport.unpark(threadMap.get("consumer"));
        log.debug("cooking over，time is {}",money);
    }
}

@Slf4j
class LockSupportConsumer implements Runnable{

    private Map<String,Thread> threadMap;
    private List<String>container;
    private  int money=0;
    public LockSupportConsumer(Map<String,Thread> threadMap,List<String>container){
        this.threadMap=threadMap;
        this.container=container;
    }
    @Override
    public void run() {
        threadMap.put("consumer",Thread.currentThread());
        while(money<15){
            if(container.size()>0){
                Iterator<String> it=container.iterator();
                while (it.hasNext()){
                    String food=it.next();
                    it.remove();
                    log.debug("eating ,delicious food is {},time is {}",food,money);
                    money++;
                }
            }else {
                LockSupport.unpark(threadMap.get("producer"));
                LockSupport.park();
            }
        }
        log.debug("eating over，time is {}",money);
    }
}
打印結(jié)果如下：
20:30:03.768 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is chicken,time is 0
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is rice,time is 1
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is beef,time is 2
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is beef,time is 3
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is potato,time is 4
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is chicken,time is 0
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is rice,time is 1
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is beef,time is 2
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is beef,time is 3
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is potato,time is 4
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is potato,time is 5
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is chicken,time is 6
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is potato,time is 7
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is potato,time is 8
20:30:03.772 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is chicken,time is 9
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is potato,time is 5
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is chicken,time is 6
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is potato,time is 7
20:30:03.772 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is potato,time is 8
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is chicken,time is 9
20:30:03.773 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is rice,time is 10
20:30:03.773 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is beef,time is 11
20:30:03.773 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is chicken,time is 12
20:30:03.773 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is beef,time is 13
20:30:03.773 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking ,this time food is potato,time is 14
20:30:03.773 [pool-1-thread-1] DEBUG com.dz.demo.multiThread.LockSupportProducer - cooking over，time is 15
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is rice,time is 10
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is beef,time is 11
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is chicken,time is 12
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is beef,time is 13
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating ,delicious food is potato,time is 14
20:30:03.773 [pool-1-thread-2] DEBUG com.dz.demo.multiThread.LockSupportConsumer - eating over，time is 15
  • 在分布式環(huán)境下的生產(chǎn)者消費(fèi)者模型問(wèn)題需要借助消息隊(duì)列mq或者redis的list類型實(shí)現(xiàn)。這個(gè)后續(xù)文章講到mq與redis會(huì)分享相關(guān)實(shí)踐

本篇講到了常見(jiàn)的三種多線程協(xié)作的模型，主要講述了解決生產(chǎn)者消費(fèi)者模型的三種常用辦法，多線程協(xié)作的其他兩個(gè)模型和相關(guān)api的使用將在下一篇中進(jìn)行講解

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