software.amazon.awssdk.retries.api.internal.backoff.FixedDelayWithJitter Maven / Gradle / Ivy
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.retries.api.internal.backoff;
import java.time.Duration;
import java.util.Random;
import java.util.function.Supplier;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.retries.api.BackoffStrategy;
import software.amazon.awssdk.utils.NumericUtils;
import software.amazon.awssdk.utils.ToString;
import software.amazon.awssdk.utils.Validate;
/**
* Strategy that waits for a random period of time between 0ms and the provided delay.
*/
@SdkInternalApi
public final class FixedDelayWithJitter implements BackoffStrategy {
private final Supplier randomSupplier;
private final Duration delay;
public FixedDelayWithJitter(Supplier randomSupplier, Duration delay) {
this.randomSupplier = Validate.paramNotNull(randomSupplier, "random");
this.delay = NumericUtils.min(Validate.isPositive(delay, "delay"), BackoffStrategiesConstants.BASE_DELAY_CEILING);
}
@Override
public Duration computeDelay(int attempt) {
Validate.isPositive(attempt, "attempt");
return Duration.ofMillis(randomSupplier.get().nextInt((int) delay.toMillis()));
}
@Override
public String toString() {
return ToString.builder("FixedDelayWithJitter")
.add("delay", delay)
.build();
}
}