content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.cassandra.concurrent;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import com.google.common.annotations.VisibleForTesting;
  
  import org.apache.cassandra.utils.ExecutorUtils;
  
  import static org.apache.cassandra.concurrent.ExecutorFactory.Global.executorFactory;
  
  /**
   * Centralized location for shared executors
   */
  public class ScheduledExecutors
  {
      /**
       * This pool is used for periodic fast (sub-microsecond) tasks.
       */
      public static final ScheduledExecutorPlus scheduledFastTasks = executorFactory().scheduled("ScheduledFastTasks");
  
      /**
       * This pool is used for periodic short (sub-second) tasks.
       */
       public static final ScheduledExecutorPlus scheduledTasks = executorFactory().scheduled("ScheduledTasks");
  
      /**
       * This executor is used for tasks that can have longer execution times, and usually are non periodic.
       */
      public static final ScheduledExecutorPlus nonPeriodicTasks = executorFactory().scheduled("NonPeriodicTasks");
  
      /**
       * This executor is used for tasks that do not need to be waited for on shutdown/drain.
       */
      public static final ScheduledExecutorPlus optionalTasks = executorFactory().scheduled(false, "OptionalTasks");
  
      @VisibleForTesting
      public static void shutdownNowAndWait(long timeout, TimeUnit unit) throws InterruptedException, TimeoutException
      {
          ExecutorUtils.shutdownNowAndWait(timeout, unit, scheduledTasks, scheduledFastTasks, nonPeriodicTasks, optionalTasks);
      }
  }
  