基于内置锁的生产者消费者模型_内置的消费者特征模型-优快云博客

本文链接：https://blog.youkuaiyun.com/fengwind1/article/details/71271559

本文深入探讨了生产者消费者模型，该模型中生产者负责填充仓库，而消费者则负责消耗仓库中的资源。通过内置锁机制，确保了生产与消费的同步，防止资源的过度生产和耗尽，实现高效且稳定的系统运行。

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这里有三个概念，生产者，消费者，仓库

public class Repository {
    private int capability;//仓库容量
    private boolean stoped=false;//生产者线程是否退出的标志，如果生产者线程退出，则消费者线程消费完所以商品后也退出，而不是等待
    private List<String> list=new ArrayList<>();
    public Repository(int capability){
        this.capability=capability;
    }
    public synchronized void add(String product) throws InterruptedException {
        list.add(product);
    }
    public synchronized String remove() throws InterruptedException {
        return list.remove(0);
    }
    public boolean isFull(){
        return list.size()==capability;
    }
    public boolean isEmpty(){
        return list.size()==0;
    }
    public void stop(){
        stoped=true;
    }
    public boolean isStoped(){
        return stoped;
    }
}

public class Productor extends Thread {
    private Repository repository;
    private int i=1;
    public Productor(Repository repository){
        this.repository=repository;
    }
    @Override
    public void run(){
        while (i<1000){
            synchronized (repository){
                try {
                    if(!repository.isFull()){
                        Thread.sleep(100);
                        String product=Thread.currentThread().getName()+(i++);
                        System.out.println("生产商品："+product);
                        repository.add(product);
                        repository.notifyAll();
                    }else {
                        System.out.println("仓库已满，暂停生产");
//                        repository.notifyAll();如果notifyAll放在此次，则只有仓库满的时候会通知消费者
                        repository.wait();
                    }
                }catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
        repository.stop();
    }
}

public class Consumer extends Thread {
    private Repository repository;
    public Consumer(Repository repository){
        this.repository=repository;
    }
    @Override
    public void run(){
        boolean stoped=false;
        while (!stoped){
            synchronized (repository){
                try {
                    if(!repository.isEmpty()){
                        System.out.println("消费商品："+repository.remove());
                        repository.notifyAll();
                    }else {
                        System.out.println("仓库已空，暂停消费");
                        if(repository.isStoped()){
                            stoped=true;
                        }else{
//                            repository.notifyAll();如果notifyAll放在此次，则只有仓库空的时候会通知生产者者
                            repository.wait();
                        }
                    }
                }catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

public class Main {
    public static void main(String[] args) throws InterruptedException {
        Repository repository=new Repository(100);
        new Productor(repository).start();
        Thread.sleep(10000);
        new Consumer(repository).start();
    }
}