redis锁等待随机毫秒数拦截和程序自动过期双重机制

redis锁等待随机毫秒数拦截和程序自动过期双重机制

上一个操作加了锁，需要等待上一个操作执行完毕之后，才允许当前操作执行，所以当前操作需要执行锁等待处理。

 

package com.example.core.mydemo.javaDemo;

import java.time.LocalDateTime;

public class RandomTest {
    public static void main(String[] args) {
        //1秒以内的随机毫秒数
        for (int i = 0; i < 10;i++) {
            long time = (long) (Math.random() * 1000);
            System.out.println("time=" + time);
        }

//        String redisKey = "myKey:" + dto.getOrdernumber();
//        Boolean haskey = stringRedisTemplate.hasKey(redisKey);
        Boolean hasKey = true;

        LocalDateTime startTime = LocalDateTime.now();
        LocalDateTime endTime = startTime.plusSeconds(5);

            //已被锁定，直接返回，等待
            while (hasKey && (startTime.isBefore(endTime) || startTime.isEqual(endTime)) ) {
                try {
                    long time = (long) (Math.random() * 1000);
                    Thread.sleep(time);
                    //重新查询
//                    haskey = stringRedisTemplate.hasKey(redisKey);
                    //重新刷新时间
                    startTime = LocalDateTime.now();
//                    log.info("判断锁存在,orderNo=[{}],haskey=[{}],waitTime=[{}]",dto.getOrdernumber(),haskey,time);
                    System.out.println("waitTime="+time+",startTime="+startTime+",endTime="+endTime);

                } catch (InterruptedException e) {
//                    log.error("exceotion:",e);
                    e.printStackTrace();
                }
            }

    }
}