backtype.storm.utils
Class StormBoundedExponentialBackoffRetry

java.lang.Object
  org.apache.curator.retry.ExponentialBackoffRetry
      org.apache.curator.retry.BoundedExponentialBackoffRetry
          backtype.storm.utils.StormBoundedExponentialBackoffRetry

All Implemented Interfaces:

org.apache.curator.RetryPolicy

public class StormBoundedExponentialBackoffRetry
extends org.apache.curator.retry.BoundedExponentialBackoffRetry

Constructor Summary

StormBoundedExponentialBackoffRetry(int baseSleepTimeMs, int maxSleepTimeMs, int maxRetries)
The class provides generic exponential-linear backoff retry strategy for storm.

Method Summary

int	getSleepTimeMs(int retryCount, long elapsedTimeMs)

Methods inherited from class org.apache.curator.retry.BoundedExponentialBackoffRetry

getMaxSleepTimeMs

Methods inherited from class org.apache.curator.retry.ExponentialBackoffRetry

getBaseSleepTimeMs

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StormBoundedExponentialBackoffRetry

public StormBoundedExponentialBackoffRetry(int baseSleepTimeMs,
                                           int maxSleepTimeMs,
                                           int maxRetries)

The class provides generic exponential-linear backoff retry strategy for storm. It calculates threshold for exponentially increasing sleeptime for retries. Beyond this threshold, the sleeptime increase is linear. Also adds jitter for exponential/linear retry. It guarantees currSleepTimeMs >= prevSleepTimeMs and baseSleepTimeMs <= currSleepTimeMs <= maxSleepTimeMs

Method Detail

getSleepTimeMs

public int getSleepTimeMs(int retryCount,
                          long elapsedTimeMs)

Overrides:

getSleepTimeMs in class org.apache.curator.retry.BoundedExponentialBackoffRetry