两种方式实现生产者与消费者模型

秒速五厘米 2023-05-22 04:37 2阅读 0赞

1.lock锁的模式

package con.carry.并发.生产者消费者模型;
    
    
    import java.util.concurrent.locks.Condition;
    import java.util.concurrent.locks.Lock;
    import java.util.concurrent.locks.ReentrantLock;
    
    /**
     * 实现线程交替加一和减一操作,循环十次
     */
    public class ReetLockDemo {
    
        public static void main(String[] args) {
    
    
            ShareData shareData = new ShareData();
            new Thread(() -> {
                for (int i = 0; i < 10; i++) {
                    shareData.increment();
                }
            }, "A").start();
    
            new Thread(() -> {
                for (int i = 0; i < 10; i++) {
                    shareData.decrement();
                }
            }, "B").start();
        }
    }
    
    
    class ShareData {
    
    
        private int num = 0;
    
        private Lock lock = new ReentrantLock();
        private Condition condition = lock.newCondition();
    
        public void increment() {
            lock.lock();
            try {
                //判断!
                while (num != 0) {
                    condition.await();
                }
                //干活
                num++;
                System.out.println(Thread.currentThread().getName() + ":" + num);
                // 通知
                condition.signalAll();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
    
    
        }
    
        public void decrement() {
            lock.lock();
            try {
                //判断!
                while (num == 0) {
                    condition.await();
                }
                //干活
                num--;
                System.out.println(Thread.currentThread().getName() + ":" + num);
                // 通知
                condition.signalAll();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
    
    
        }
    
    
    }

2.阻塞队列的模式