spring retry 重试机制完整例子


public static Boolean vpmsRetryCoupon(final String userId) { // 构建重试模板实例 RetryTemplate retryTemplate = new RetryTemplate(); // 设置重试策略,主要设置重试次数 SimpleRetryPolicy policy = new SimpleRetryPolicy(10, Collections.<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)); // 设置重试回退操作策略,主要设置重试间隔时间 FixedBackOffPolicy fixedBackOffPolicy = new FixedBackOffPolicy(); fixedBackOffPolicy.setBackOffPeriod(100); retryTemplate.setRetryPolicy(policy); retryTemplate.setBackOffPolicy(fixedBackOffPolicy); // 通过RetryCallback 重试回调实例包装正常逻辑逻辑,第一次执行和重试执行执行的都是这段逻辑 final RetryCallback<Object, Exception> retryCallback = new RetryCallback<Object, Exception>() { //RetryContext 重试操作上下文约定,统一spring-try包装 public Object doWithRetry(RetryContext context) throws Exception { boolean result = pushCouponByVpmsaa(userId); if(!result){ throw new RuntimeException();//这个点特别注意,重试的根源通过Exception返回 } return true; } }; // 通过RecoveryCallback 重试流程正常结束或者达到重试上限后的退出恢复操作实例 final RecoveryCallback<Object> recoveryCallback = new RecoveryCallback<Object>() { public Object recover(RetryContext context) throws Exception { // logger.info("正在重试发券::::::::::::"+userId); return null; } }; try { // 由retryTemplate 执行execute方法开始逻辑执行 retryTemplate.execute(retryCallback, recoveryCallback); } catch (Exception e) { // logger.info("发券错误异常========"+e.getMessage()); e.printStackTrace(); } return true; } public static void main(String[] args) { vpmsRetryCoupon("43333"); } public static Boolean pushCouponByVpmsaa(String userId){ Random random = new Random(); int a= random.nextInt(10); System.out.println("a是"+a); if(a==8){ return true; }else{ return false; }

 

posted @ 2017-11-13 20:51  猪哥哥厉害  阅读(8409)  评论(0编辑  收藏  举报