condition实现通知部分线程

多个condition实现通知部分线程：

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class MyService {
    private Lock lock = new ReentrantLock();
    //获取两个Condition
    private Condition conditionA = lock.newCondition();
    private Condition conditionB = lock.newCondition();
    
    public void awaitA() {
        try {
            lock.lock();
            System.out.println("begin awaitA时间：" + System.currentTimeMillis() + "----" + Thread.currentThread().getName());
            conditionA.await();
            System.out.println("end awaitA时间：" + System.currentTimeMillis() + "----" + Thread.currentThread().getName());
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    
    public void awaitB() {
        try {
            lock.lock();
            System.out.println("begin awaitB时间：" + System.currentTimeMillis() + "----" + Thread.currentThread().getName());
            conditionB.await();
            System.out.println("end awaitB时间：" + System.currentTimeMillis() + "----" + Thread.currentThread().getName());
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    
    public void signalAll_A() {
        try {
            lock.lock();
            System.out.println("signalAll_A时间为：" + System.currentTimeMillis() + "----" + Thread.currentThread().getName());
            conditionA.signalAll();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    
    public void signalAll_B() {
        try {
            lock.lock();
            System.out.println("signalAll_B时间为：" + System.currentTimeMillis() + "----" + Thread.currentThread().getName());
            conditionB.signalAll();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
}

public class ThreadA extends Thread{

    private MyService service;

    public ThreadA(MyService service) {
        this.service = service;
    }
    
    @Override
    public void run() {
        service.awaitA();
    }
}

public class ThreadB extends Thread{

    private MyService service;
    
    public ThreadB(MyService service) {
        this.service = service;
    }
    
    @Override
    public void run() {
        service.awaitB();
    }
}

/**
 *    测试类
 */
public class Run {

    public static void main(String[] args) {
        MyService service = new MyService();
        ThreadA a = new ThreadA(service);
        a.setName("A");
        a.start();
        
        ThreadB b = new ThreadB(service);
        b.setName("B");
        b.start();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //只唤醒A
        service.signalAll_A();
    }
}

运行结果如下：