content: /**
   * 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 org.apache.aurora.common.util;
  
  /**
   * Encapsulates a strategy for backing off from an operation that repeatedly fails.
   */
  public interface BackoffStrategy {
  
    /**
     * Calculates the amount of time to backoff from an operation.
     *
     * @param lastBackoffMs the last used backoff in milliseconds where 0 signifies no backoff has
     *     been performed yet
     * @return the amount of time in milliseconds to back off before retrying the operation
     */
    long calculateBackoffMs(long lastBackoffMs);
  
    /**
     * Returns whether to continue backing off.
     *
     * @param lastBackoffMs the last used backoff in milliseconds
     * @return whether to continue backing off
     */
    boolean shouldContinue(long lastBackoffMs);
  }
  