content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.time;
  
  import java.time.Duration;
  import java.util.function.Supplier;
  
  /**
   * An interface for a utility which provides a sleep method.
   */
  public interface Sleeper {
  
    /**
     * Sleeps for the given duration.
     *
     * @param duration the duration to sleep for
     * @throws InterruptedException if the sleep is interrupted
     */
    void sleep(Duration duration) throws InterruptedException;
  
    /**
     * Sleeps for given duration but period wake-up by new interval supplier.
     * @param durationSupplier New sleep interval supplier
     * @throws InterruptedException
     */
    default void sleep(Supplier<Duration> durationSupplier)
        throws InterruptedException {
      sleep(durationSupplier.get());
    }
  }
  