Package io.camunda.client.impl.worker

Class ExponentialBackoff

java.lang.Object

io.camunda.client.impl.worker.ExponentialBackoff

All Implemented Interfaces:

BackoffSupplier

public final class ExponentialBackoff
extends Object
implements BackoffSupplier

An implementation of BackoffSupplier which uses a simple formula, multiplying the previous delay with an increasing multiplier and adding some jitter to avoid multiple clients polling at the same time even with back off.

The next delay is calculated as:

 max(min(maxDelay, currentDelay * backoffFactor), minDelay) + (rand(0.0, 1.0) *
 (currentDelay * jitterFactor) + (currentDelay * -jitterFactor)) 

Constructor Summary

Constructors

Constructor	Description
ExponentialBackoff(long maxDelay, long minDelay, double backoffFactor, double jitterFactor, Random random)

Method Summary

Modifier and Type	Method	Description
long	supplyRetryDelay(long currentRetryDelay)	Returns the delay before the next retry.

Methods inherited from class java.lang.Object

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

Constructor Details

ExponentialBackoff

public ExponentialBackoff(long maxDelay,
 long minDelay,
 double backoffFactor,
 double jitterFactor,
 Random random)

Method Details

supplyRetryDelay

public long supplyRetryDelay(long currentRetryDelay)

Description copied from interface: BackoffSupplier

Returns the delay before the next retry. The delay should be specified in milliseconds.

Specified by:

supplyRetryDelay in interface BackoffSupplier

Parameters:

currentRetryDelay - the last used retry delay

Returns:

the new retry delay