package com.wxit.juc;

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

/**
 * @Author wj
 * 备注：多线程之间按顺序调用，实现A-B-C
 * 三个线程启动，要求如下：
 *A:打印五次
 * B：打印10次
 * C：打印15次
 **/
public class ConditionDemo {
    
    
    public static void main(String[] args) {
    
    
        ShareData shareData = new ShareData();

        new Thread(() -> {
    
    
            for (int i = 0; i < 10; i++) {
    
    
                shareData.print5();
            }
        },"A").start();

        new Thread(() -> {
    
    
            for (int i = 0; i < 10; i++) {
    
    
                shareData.print10();
            }
        },"B").start();

        new Thread(() -> {
    
    
            for (int i = 0; i < 10; i++) {
    
    
                shareData.print15();
            }
        },"C").start();
    }
}


class ShareData{
    
    

    private int number = 1;//标志位    A:1 B:2 C:3
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void print15(){
    
    
       lock.lock();
       try{
    
    
           while (number != 3){
    
    
              c1.await();
           }
           for (int i = 0; i < 15; i++) {
    
    
               System.out.println(Thread.currentThread().getName() + "\t" + i);
           }
           number = 1;
           c2.signal();
       }catch (Exception e){
    
    
           e.printStackTrace();
       }finally {
    
    
           lock.unlock();
       }
    }

    public void print10(){
    
    
        lock.lock();
        try{
    
    
            while (number != 2){
    
    
                c1.await();
            }
            for (int i = 0; i < 10; i++) {
    
    
                System.out.println(Thread.currentThread().getName() + "\t" + i);
            }
            number = 3;
            c3.signal();
        }catch (Exception e){
    
    
            e.printStackTrace();
        }finally {
    
    
            lock.unlock();
        }
    }

    public void print5(){
    
    
        lock.lock();
        try{
    
    
            while (number != 1){
    
    
                c1.await();
            }
            for (int i = 0; i < 5; i++) {
    
    
                System.out.println(Thread.currentThread().getName() + "\t" + i);
            }
            number = 2;
            c2.signal();
        }catch (Exception e){
    
    
            e.printStackTrace();
        }finally {
    
    
            lock.unlock();
        }
    }
}