Based on RetryTemplate with ExponentialBackOff.
Includes optional jitter support in ExponentialBackOff.
Supports reactive methods through Reactor's RetryBackoffSpec.
Closes gh-34529
Prior to this commit, we had three concrete RetryPolicy implementations.
- MaxRetryAttemptsPolicy
- MaxDurationAttemptsPolicy
- PredicateRetryPolicy
However, there was no way to combine the behavior of those policies.
Furthermore, the PredicateRetryPolicy was practically useless as a
standalone policy, since it did not have a way to end an infinite loop
for a Retryable that continually throws an exception which matches the
predicate.
This commit therefore replaces the current built-in RetryPolicy
implementations with a fluent Builder API and dedicated factory methods
for common use cases.
In addition, this commit also introduces built-in support for
specifying include/exclude lists.
Examples:
new MaxRetryAttemptsPolicy(5) -->
RetryPolicy.withMaxAttempts(5)
new MaxDurationAttemptsPolicy(Duration.ofSeconds(5)) -->
RetryPolicy.withMaxDuration(Duration.ofSeconds(5))
new PredicateRetryPolicy(IOException.class::isInstance) -->
RetryPolicy.builder()
.maxAttempts(3)
.predicate(IOException.class::isInstance)
.build();
The following example demonstrates all supported features of the builder.
RetryPolicy.builder()
.maxAttempts(5)
.maxDuration(Duration.ofMillis(100))
.includes(IOException.class)
.excludes(FileNotFoundException.class)
.predicate(t -> t.getMessage().contains("Unexpected failure"))
.build();
Closes gh-35058
Exposes last exception as cause in RetryException.
Applies first back-off after the initial exception.
Breaks out of retry loop on BackOffExecution.STOP.
Expects null result in Retryable and RetryListener.
Closes gh-35057
This commit configures a new CheckStyle rule that fails for empty
"catch" blocks, unless the exception is named "ignored" or "expected".
This also fixes the remaining instances missed by the previous commit.
Closes gh-35047
The Spring codebase sometimes ignores exceptions in catch blocks on
purpose. This is often called out by an inline comment.
We should make this more obvious by renaming the exception argument in
the catch block to declare whether the exception is "ignored" or
"expected".
See gh-35047
Signed-off-by: Vincent Potucek <vpotucek@me.com>
[brian.clozel@broadcom.com: rework commit message]
Signed-off-by: Brian Clozel <brian.clozel@broadcom.com>
Due to lacking support in NullAway for the current arrangement, we are
(perhaps temporarily) changing the signature of the execute() method in
RetryOperations (and thus also in RetryTemplate)...
from: <R extends @Nullable Object> R execute(Retryable<R> retryable);
to: <R> @Nullable R execute(Retryable<? extends @Nullable R> retryable);
Once https://github.com/uber/NullAway/issues/1075 has been resolved, we
will consider switching back to the original signature.
See gh-34716
This commit constitutes a first pass over the new core retry support.
- Fix code and Javadoc formatting
- Polish/fix Javadoc
- Fix default FixedBackOff configuration in RetryTemplate
- Consistent logging in RetryTemplate
- Fix listener handling in CompositeRetryListener, allowing addListener()
to work
- Polish tests
- Ensure RetryTemplateTests do not take over 30 seconds to execute
See gh-34716
This commit introduces a minimal core retry feature. It is inspired
by Spring Retry, but redesigned and trimmed to the bare minimum to
cover most cases.
Closes gh-34716
Juergen Hoeller