spring-retry 重试机制

引用pom.xml

 <dependency>
    <groupId>org.springframework.retry</groupId>
     <artifactId>spring-retry</artifactId>
    <version>1.3.4</version>
</dependency>

注：本人测试使用jdk8

例子：

public void demo(String str) throws Throwable {

        RetryTemplate build = RetryTemplate.builder().maxAttempts(10)//最大重试次数
                .exponentialBackoff(1000, 2, 3 * 1000)
                .retryOn(RuntimeException.class)//遇到RuntimeException触发重试
                .build();
        build.execute((RetryCallback<Object, Throwable>) context -> {
            //执行业务逻辑
            int retryCount = context.getRetryCount()+1;
            log.info(">>" + str + " Retry 触发时间：" + DateUtils.emptyFormat(new Date()) + ",触发次数：" + retryCount);
            //if (retryCount < 3) {
                log.info(">> Retry 抛出一下 RuntimeException");
                throw new RuntimeException("RuntimeException");
            //}
            //log.info(">> Retry 执行完毕");
            //return true;
        }, (RecoveryCallback<Object>) context -> {
            //当重试次数耗尽时 重试次数耗尽时触发，降级业务逻辑
            int retryCount = context.getRetryCount();
            log.info("Retry 重试次数耗尽时触发，降级业务逻辑.共重试次数" + retryCount);


            return null;
        });

    }public void demo(String str) throws Throwable {

        RetryTemplate build = RetryTemplate.builder().maxAttempts(10)//最大重试次数
                .exponentialBackoff(1000, 2, 3 * 1000)
                .retryOn(RuntimeException.class)//遇到RuntimeException触发重试
                .build();
        build.execute((RetryCallback<Object, Throwable>) context -> {
            //执行业务逻辑
            int retryCount = context.getRetryCount()+1;
            log.info(">>" + str + " Retry 触发时间：" + DateUtils.emptyFormat(new Date()) + ",触发次数：" + retryCount);
            //if (retryCount < 3) {
                log.info(">> Retry 抛出一下 RuntimeException");
                throw new RuntimeException("RuntimeException");
            //}
            //log.info(">> Retry 执行完毕");
            //return true;
        }, (RecoveryCallback<Object>) context -> {
            //当重试次数耗尽时 重试次数耗尽时触发，降级业务逻辑
            int retryCount = context.getRetryCount();
            log.info("Retry 重试次数耗尽时触发，降级业务逻辑.共重试次数" + retryCount);


            return null;
        });

    }

 

执行结果：

 

参考文档：
https://github.com/spring-projects/spring-retry

exponentialBackoff(1000, 2, 3 * 1000) 参数含义：