com.netflix.astyanax.retry.BoundedExponentialBackoff Maven / Gradle / Ivy
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* Copyright 2011 Netflix
*
* 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 com.netflix.astyanax.retry;
import org.apache.commons.lang.builder.ToStringBuilder;
/**
* Bounded exponential backoff that will wait for no more than a provided max amount of time.
*
* The following examples show the maximum wait time for each attempt
* ExponentalBackoff(250, 10)
* 250 500 1000 2000 4000 8000 16000 32000 64000 128000
*
* BoundedExponentialBackoff(250, 5000, 10)
* 250 500 1000 2000 4000 5000 5000 5000 5000 5000
*
* @author elandau
*
*/
public class BoundedExponentialBackoff extends ExponentialBackoff {
private final int maxSleepTimeMs;
public BoundedExponentialBackoff(int baseSleepTimeMs, int maxSleepTimeMs, int max) {
super(baseSleepTimeMs, max);
this.maxSleepTimeMs = maxSleepTimeMs;
}
public long getSleepTimeMs() {
return Math.min(maxSleepTimeMs, super.getSleepTimeMs());
}
@Override
public RetryPolicy duplicate() {
return new BoundedExponentialBackoff(getBaseSleepTimeMs(), maxSleepTimeMs, getMaxAttemptCount());
}
public int getMaxSleepTimeMs() {
return maxSleepTimeMs;
}
public String toString() {
return ToStringBuilder.reflectionToString(this);
}
}