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Spring Retry
  1. https://docs.spring.io/spring-batch/trunk/reference/html/retry.html#retryTemplate
  2. Support ExponentialBackOffPolicy backoff
  3. Support counter
  4. Support exception
  5. SimpleRetryPolicy retryPolicy = new SimpleRetryPolicy(retryCount, retryableExceptions);
    ExponentialBackOffPolicy backOffPolicy = new ExponentialBackOffPolicy();

       RetryTemplate retryTemplate = new t();
       retryTemplate.setRetryPolicy(retryPolicy);
       retryTemplate.setBackOffPolicy(backOffPolicy);