Module io.helidon.faulttolerance

Package io.helidon.faulttolerance

Class Retry.ExponentialRetryPolicy

java.lang.Object

io.helidon.faulttolerance.Retry.ExponentialRetryPolicy

All Implemented Interfaces:

Retry.RetryPolicy

Enclosing interface:

Retry

public static class Retry.ExponentialRetryPolicy
extends Object
implements Retry.RetryPolicy

A retry policy that increases the delay time following an exponential sequence. Allowed elements that are also annotated with @Retry. Expected sequence in case factor is 2: initial delay, 2 * initial delay + jitter, 4 * initial delay + jitter, 8 * initial delay + jitter, etc. maxDelay is used to prevent endless waiting.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Retry.ExponentialRetryPolicy.Builder	Fluent API builder for Retry.ExponentialRetryPolicy.

Method Summary

Modifier and Type	Method	Description
static Retry.ExponentialRetryPolicy.Builder	builder()	A new fluent API builder to configure instances of Retry.
Optional<Long>	nextDelayMillis(long firstCallMillis, long lastDelay, int call)	Return next delay in milliseconds, or an empty optional to finish retries.

Methods inherited from class java.lang.Object

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

Method Detail

builder

public static Retry.ExponentialRetryPolicy.Builder builder()

A new fluent API builder to configure instances of Retry.

Returns:

a new builder

nextDelayMillis

public Optional<Long> nextDelayMillis(long firstCallMillis,
                                      long lastDelay,
                                      int call)

Description copied from interface: Retry.RetryPolicy

Return next delay in milliseconds, or an empty optional to finish retries.

Specified by:

nextDelayMillis in interface Retry.RetryPolicy

Parameters:

firstCallMillis - milliseconds recorded before the first call using System.currentTimeMillis()

lastDelay - last delay that was used (0 for the first failed call)

call - call index (0 for the first failed call)

Returns:

how long to wait before trying again, or empty to notify this is the end of retries