io.micronaut.retry.RetryState Maven / Gradle / Ivy
/*
* Copyright 2017-2019 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.retry;
import javax.annotation.Nullable;
import java.time.Duration;
import java.util.Optional;
import java.util.OptionalDouble;
/**
* An interface that encapsulates the current state of a {@link io.micronaut.retry.annotation.Retryable} operation.
*
* @author graemerocher
* @since 1.0
*/
public interface RetryState {
/**
* Should a retry attempt occur.
*
* @param exception The error
*
* @return True if it should
*/
boolean canRetry(Throwable exception);
/**
* @return The maximum number of attempts
*/
int getMaxAttempts();
/**
* @return The number of the current attempt
*/
int currentAttempt();
/**
* @return The multiplier to use between delays
*/
OptionalDouble getMultiplier();
/**
* @return The delay between attempts
*/
Duration getDelay();
/**
* @return The overall delay so far
*/
Duration getOverallDelay();
/**
* @return The maximum overall delay
*/
Optional getMaxDelay();
/**
* Opens the retry state.
*/
default void open() {
// no-op for stateless retry
}
/**
* Closes the {@link RetryState}.
*
* @param exception An exception if an error occurred or null if the operation completed as expected
*/
default void close(@Nullable Throwable exception) {
// no-op for stateless retry
}
}