Package io.smallrye.faulttolerance.api

Interface FaultTolerance.Builder.RetryBuilder<T,R>

Enclosing interface:

FaultTolerance.Builder<T,R>

public static interface FaultTolerance.Builder.RetryBuilder<T,R>

Configures a retry.

See Also:

• @Retry

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	FaultTolerance.Builder.RetryBuilder.CustomBackoffBuilder<T,R>	Configures a custom backoff for retry.
static interface	FaultTolerance.Builder.RetryBuilder.ExponentialBackoffBuilder<T,R>	Configures an exponential backoff for retry.
static interface	FaultTolerance.Builder.RetryBuilder.FibonacciBackoffBuilder<T,R>	Configures a Fibonacci backoff for retry.

Method Summary

Modifier and Type	Method	Description
default FaultTolerance.Builder.RetryBuilder<T,R>	abortOn(Class<? extends Throwable> value)	Equivalent to abortOn(Collections.singleton(value)).
FaultTolerance.Builder.RetryBuilder<T,R>	abortOn(Collection<Class<? extends Throwable>> value)	Sets the set of exception types considered success.
FaultTolerance.Builder.RetryBuilder<T,R>	beforeRetry(Runnable value)	Sets a before retry handler, which is called before each retry, but not before the original attempt.
FaultTolerance.Builder.RetryBuilder<T,R>	beforeRetry(Consumer<Throwable> value)	Sets a before retry handler, which is called before each retry, but not before the original attempt.
FaultTolerance.Builder.RetryBuilder<T,R>	delay(long value, ChronoUnit unit)	Sets the delay between retries.
FaultTolerance.Builder<T,R>	done()	Returns the original fault tolerance builder.
FaultTolerance.Builder.RetryBuilder<T,R>	jitter(long value, ChronoUnit unit)	Sets the jitter bound.
FaultTolerance.Builder.RetryBuilder<T,R>	maxDuration(long value, ChronoUnit unit)	Sets the maximum duration of all invocations, including possible retries.
FaultTolerance.Builder.RetryBuilder<T,R>	maxRetries(int value)	Sets the maximum number of retries.
FaultTolerance.Builder.RetryBuilder<T,R>	onFailure(Runnable callback)	Sets a callback that will be invoked when this retry strategy treats a finished invocation as failure, and no more retries will be attempted.
FaultTolerance.Builder.RetryBuilder<T,R>	onRetry(Runnable callback)	Sets a callback that will be invoked when a retry is attempted.
FaultTolerance.Builder.RetryBuilder<T,R>	onSuccess(Runnable callback)	Sets a callback that will be invoked when this retry strategy treats a finished invocation as success, regardless of whether a retry was attempted or not.
default FaultTolerance.Builder.RetryBuilder<T,R>	retryOn(Class<? extends Throwable> value)	Equivalent to retryOn(Collections.singleton(value)).
FaultTolerance.Builder.RetryBuilder<T,R>	retryOn(Collection<Class<? extends Throwable>> value)	Sets the set of exception types considered failure.
default FaultTolerance.Builder.RetryBuilder<T,R>	when(Predicate<Throwable> value)	Deprecated, for removal: This API element is subject to removal in a future version. use whenException(Predicate)
FaultTolerance.Builder.RetryBuilder<T,R>	whenException(Predicate<Throwable> value)	Sets a predicate to determine when an exception should be considered failure and retry should be attempted.
FaultTolerance.Builder.RetryBuilder<T,R>	whenResult(Predicate<Object> value)	Sets a predicate to determine when a result should be considered failure and retry should be attempted.
default FaultTolerance.Builder.RetryBuilder<T,R>	with(Consumer<FaultTolerance.Builder.RetryBuilder<T,R>> consumer)
FaultTolerance.Builder.RetryBuilder.CustomBackoffBuilder<T,R>	withCustomBackoff()	Configures retry to use a custom backoff instead of the default constant backoff.
FaultTolerance.Builder.RetryBuilder.ExponentialBackoffBuilder<T,R>	withExponentialBackoff()	Configures retry to use an exponential backoff instead of the default constant backoff.
FaultTolerance.Builder.RetryBuilder.FibonacciBackoffBuilder<T,R>	withFibonacciBackoff()	Configures retry to use a Fibonacci backoff instead of the default constant backoff.

Method Details

maxRetries

FaultTolerance.Builder.RetryBuilder<T,R> maxRetries(int value)

Sets the maximum number of retries. Defaults to 3.

Parameters:

value - the maximum number of retries, must be >= -1.

Returns:

this retry builder

See Also:

• @Retry.maxRetries

delay

FaultTolerance.Builder.RetryBuilder<T,R> delay(long value,
 ChronoUnit unit)

Sets the delay between retries. Defaults to 0.

Parameters:

value - the delay length, must be >= 0

unit - the delay unit, must not be null

Returns:

this retry builder

See Also:

• @Retry.delay
• @Retry.delayUnit

maxDuration

FaultTolerance.Builder.RetryBuilder<T,R> maxDuration(long value,
 ChronoUnit unit)

Sets the maximum duration of all invocations, including possible retries. Defaults to 3 minutes.

Parameters:

value - the maximum duration length, must be >= 0

unit - the maximum duration unit, must not be null

Returns:

this retry builder

See Also:

• @Retry.maxDuration
• @Retry.durationUnit

jitter

FaultTolerance.Builder.RetryBuilder<T,R> jitter(long value,
 ChronoUnit unit)

Sets the jitter bound. Random value in the range from -jitter to +jitter will be added to the delay between retry attempts. Defaults to 200 millis.

Parameters:

value - the jitter bound length, must be >= 0

unit - the jitter bound unit, must not be null

Returns:

this retry builder

See Also:

• @Retry.jitter
• @Retry.jitterDelayUnit

retryOn

FaultTolerance.Builder.RetryBuilder<T,R> retryOn(Collection<Class<? extends Throwable>> value)

Sets the set of exception types considered failure. Defaults to all exceptions (Exception).

Parameters:

value - collection of exception types, must not be null

Returns:

this retry builder

See Also:

• @Retry.retryOn

retryOn

default FaultTolerance.Builder.RetryBuilder<T,R> retryOn(Class<? extends Throwable> value)

Equivalent to retryOn(Collections.singleton(value)).

Parameters:

value - an exception class, must not be null

Returns:

this retry builder

abortOn

FaultTolerance.Builder.RetryBuilder<T,R> abortOn(Collection<Class<? extends Throwable>> value)

Sets the set of exception types considered success. Defaults to no exception (empty set).

Parameters:

value - collection of exception types, must not be null

Returns:

this retry builder

See Also:

• @Retry.abortOn

abortOn

default FaultTolerance.Builder.RetryBuilder<T,R> abortOn(Class<? extends Throwable> value)

Equivalent to abortOn(Collections.singleton(value)).

Parameters:

value - an exception class, must not be null

Returns:

this retry builder

whenResult

FaultTolerance.Builder.RetryBuilder<T,R> whenResult(Predicate<Object> value)

Sets a predicate to determine when a result should be considered failure and retry should be attempted. All results that do not match this predicate are implicitly considered success.

Parameters:

value - the predicate, must not be null

Returns:

this retry builder

when

@Deprecated(forRemoval=true)
default FaultTolerance.Builder.RetryBuilder<T,R> when(Predicate<Throwable> value)

Deprecated, for removal: This API element is subject to removal in a future version.

use whenException(Predicate)

whenException

FaultTolerance.Builder.RetryBuilder<T,R> whenException(Predicate<Throwable> value)

Sets a predicate to determine when an exception should be considered failure and retry should be attempted. This is a more general variant of retryOn. Note that there is no generalized abortOn, because all exceptions that do not match this predicate are implicitly considered success.

If this method is called, retryOn and abortOn may not be called.

Parameters:

value - the predicate, must not be null

Returns:

this retry builder

beforeRetry

FaultTolerance.Builder.RetryBuilder<T,R> beforeRetry(Runnable value)

Sets a before retry handler, which is called before each retry, but not before the original attempt.

Parameters:

value - the before retry handler, must not be null

Returns:

this retry builder

beforeRetry

FaultTolerance.Builder.RetryBuilder<T,R> beforeRetry(Consumer<Throwable> value)

Sets a before retry handler, which is called before each retry, but not before the original attempt.

Parameters:

value - the before retry handler, must not be null

Returns:

this retry builder

withExponentialBackoff

FaultTolerance.Builder.RetryBuilder.ExponentialBackoffBuilder<T,R> withExponentialBackoff()

Configures retry to use an exponential backoff instead of the default constant backoff.

Only one backoff strategy may be configured, so calling withFibonacciBackoff() or withCustomBackoff() in addition to this method leads to an exception during done().

Returns:

the exponential backoff builder

See Also:

• @ExponentialBackoff

withFibonacciBackoff

FaultTolerance.Builder.RetryBuilder.FibonacciBackoffBuilder<T,R> withFibonacciBackoff()

Configures retry to use a Fibonacci backoff instead of the default constant backoff.

Only one backoff strategy may be configured, so calling withExponentialBackoff() or withCustomBackoff() in addition to this method leads to an exception during done().

Returns:

the Fibonacci backoff builder

See Also:

• @FibonacciBackoff

withCustomBackoff

FaultTolerance.Builder.RetryBuilder.CustomBackoffBuilder<T,R> withCustomBackoff()

Configures retry to use a custom backoff instead of the default constant backoff.

Only one backoff strategy may be configured, so calling withExponentialBackoff() or withFibonacciBackoff() in addition to this method leads to an exception during done().

Returns:

the custom backoff builder

See Also:

• @CustomBackoff

onRetry

FaultTolerance.Builder.RetryBuilder<T,R> onRetry(Runnable callback)

Sets a callback that will be invoked when a retry is attempted.

The callback must be fast and non-blocking and must not throw an exception.

Parameters:

callback - the retried callback, must not be null

Returns:

this retry builder

onSuccess

FaultTolerance.Builder.RetryBuilder<T,R> onSuccess(Runnable callback)

Sets a callback that will be invoked when this retry strategy treats a finished invocation as success, regardless of whether a retry was attempted or not.

The callback must be fast and non-blocking and must not throw an exception.

Parameters:

callback - the retried callback, must not be null

Returns:

this retry builder

onFailure

FaultTolerance.Builder.RetryBuilder<T,R> onFailure(Runnable callback)

Sets a callback that will be invoked when this retry strategy treats a finished invocation as failure, and no more retries will be attempted. The failure may be caused by depleting the maximum number of retries or the maximum duration, or by an exception that is not retryable.

The callback must be fast and non-blocking and must not throw an exception.

Parameters:

callback - the retried callback, must not be null

Returns:

this retry builder

done

FaultTolerance.Builder<T,R> done()

Returns the original fault tolerance builder.

Returns:

the original fault tolerance builder

with

default FaultTolerance.Builder.RetryBuilder<T,R> with(Consumer<FaultTolerance.Builder.RetryBuilder<T,R>> consumer)