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.util;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Sleep utilities shared by all components in Alluxio.
   */
  @ThreadSafe
  public final class SleepUtils {
    private static final Logger LOG = LoggerFactory.getLogger(SleepUtils.class);
  
    /**
     * Sleeps for the given number of milliseconds.
     *
     * @param timeMs sleep duration in milliseconds
     */
    public static void sleepMs(long timeMs) {
      sleepMs(null, timeMs);
    }
  
    /**
     * Sleeps for the given number of milliseconds, reporting interruptions using the given logger.
     *
     * Unlike Thread.sleep(), this method responds to interrupts by setting the thread interrupt
     * status. This means that callers must check the interrupt status if they need to handle
     * interrupts.
     *
     * @param logger logger for reporting interruptions; no reporting is done if the logger is null
     * @param timeMs sleep duration in milliseconds
     */
    public static void sleepMs(Logger logger, long timeMs) {
      try {
        Thread.sleep(timeMs);
      } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
        if (logger != null) {
          logger.warn(e.getMessage(), e);
        }
      }
    }
  
    private SleepUtils() {} // prevent instantiation
  }
  