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RetryDemo.java
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75 lines (64 loc) · 1.71 KB
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package com.retry;
import lombok.extern.slf4j.Slf4j;
import java.util.Random;
/**
* 重试
*
* 服务不稳定的时候，可以重试。
*
*/
@Slf4j
public class RetryDemo {
public static void main(String[] args) throws InterruptedException {
retryDoSomething();
}
public static void retryDoSomething() throws InterruptedException {
log.info("retryDoSomething start.");
//重试次数
int maxTimes = 5;
//每次重试间隔时间
int interval = 500;
for (int i = 0; i <= maxTimes; i++) {
boolean isOk = doSomething();
//成功了就停止
if (isOk ) {
break;
}
//失败就间隔一段时间后再执行
Thread.sleep(interval);
}
log.info("retryDoSomething end.");
}
/**
* 执行逻辑，成功就返回 true，报错返回 false
*
* @return
*/
public static boolean doSomething() {
try {
//执行逻辑
doSth();
} catch (Exception e) {
log.error("service.doSomething() error.", e);
return false;
}
return true;
}
/**
* 执行逻辑的方法
*
* 以下是示例,可以将示例替换成自己的逻辑
*
*/
private static void doSth() {
Random random = new Random();
//随机产生一个[0-100]之间的随机数，由于是随机，每次执行的结果可能不一样
int num = random.nextInt(101);
if (num % 5 ==0) {
log.info("doSth num:"+ num);
} else {
//模拟失败，抛异常
throw new NumberFormatException();
}
}
}