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.utils;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import org.apache.cassandra.concurrent.Shutdownable;
  
  import static java.util.concurrent.TimeUnit.NANOSECONDS;
  import static org.apache.cassandra.utils.Clock.Global.nanoTime;
  
  public class ExecutorUtils
  {
  
      public static Runnable runWithThreadName(Runnable runnable, String threadName)
      {
          return () -> {
              String oldThreadName = Thread.currentThread().getName();
              try
              {
                  Thread.currentThread().setName(threadName);
                  runnable.run();
              }
              finally
              {
                  Thread.currentThread().setName(oldThreadName);
              }
          };
      }
  
      public static void shutdownNow(Iterable<?> executors)
      {
          shutdown(true, executors);
      }
  
      public static void shutdown(Iterable<?> executors)
      {
          shutdown(false, executors);
      }
  
      public static void shutdown(boolean interrupt, Iterable<?> executors)
      {
          for (Object executor : executors)
          {
              if (executor instanceof ExecutorService)
              {
                  if (interrupt) ((ExecutorService) executor).shutdownNow();
                  else ((ExecutorService) executor).shutdown();
              }
              else if (executor instanceof Shutdownable)
              {
                  if (interrupt) ((Shutdownable) executor).shutdownNow();
                  else ((Shutdownable) executor).shutdown();
              }
              else if (executor instanceof Thread)
                  ((Thread) executor).interrupt();
              else if (executor != null)
                  throw new IllegalArgumentException(executor.toString());
          }
      }
  
      public static boolean shutdownSequentiallyAndWait(Iterable<?> executors, long timeout, TimeUnit unit)
      {
          long deadline = nanoTime() + unit.toNanos(timeout);
  
          boolean shutdown = true;
          for (Object executor : executors)
          {
              try
              {
                  if (executor instanceof ExecutorService)
                  {
                      ((ExecutorService) executor).shutdown();
                      if (!((ExecutorService) executor).awaitTermination(Math.max(0, deadline - nanoTime()), NANOSECONDS))
                          shutdown = false;
                  }
                  else if (executor instanceof Shutdownable)
                  {
                      ((Shutdownable) executor).shutdown();
                      if (!((Shutdownable) executor).awaitTermination(Math.max(0, deadline - nanoTime()), NANOSECONDS))
                          shutdown = false;
                  }
                  else
                      throw new IllegalArgumentException(executor.toString());
              }
              catch (Throwable t)
              {
                  throw new IllegalStateException("Caught interrupt while shutting down " + executor, t);
              }
          }
  
          return shutdown;
      }
  
      public static void shutdown(ExecutorService ... executors)
      {
          shutdown(Arrays.asList(executors));
      }
  
      public static void shutdownNow(ExecutorService ... executors)
      {
          shutdownNow(Arrays.asList(executors));
      }
  
      public static void awaitTermination(long timeout, TimeUnit unit, ExecutorService ... executors) throws InterruptedException, TimeoutException
      {
          awaitTermination(timeout, unit, Arrays.asList(executors));
      }
  
      public static void awaitTermination(long timeout, TimeUnit unit, Collection<?> executors) throws InterruptedException, TimeoutException
      {
          long deadline = nanoTime() + unit.toNanos(timeout);
          awaitTerminationUntil(deadline, executors);
      }
  
      public static void awaitTerminationUntil(long deadline, Collection<?> executors) throws InterruptedException, TimeoutException
      {
          for (Object executor : executors)
          {
              long wait = deadline - nanoTime();
              if (executor instanceof ExecutorService)
              {
                  if (wait <= 0 || !((ExecutorService)executor).awaitTermination(wait, NANOSECONDS))
                      throw new TimeoutException(executor + " did not terminate on time");
              }
              else if (executor instanceof Shutdownable)
              {
                  if (wait <= 0 || !((Shutdownable)executor).awaitTermination(wait, NANOSECONDS))
                      throw new TimeoutException(executor + " did not terminate on time");
              }
              else if (executor instanceof Thread)
              {
                  Thread t = (Thread) executor;
                  if (wait <= 0)
                      throw new TimeoutException(executor + " did not terminate on time");
                  t.join((wait + 999999) / 1000000L, (int) (wait % 1000000L));
                  if (t.isAlive())
                      throw new TimeoutException(executor + " did not terminate on time");
              }
              else if (executor != null)
              {
                  throw new IllegalArgumentException(executor.toString());
              }
          }
      }
  
      public static void shutdownAndWait(long timeout, TimeUnit unit, Collection<?> executors) throws TimeoutException, InterruptedException
      {
          shutdown(executors);
          awaitTermination(timeout, unit, executors);
      }
  
      public static void shutdownNowAndWait(long timeout, TimeUnit unit, Collection<?> executors) throws TimeoutException, InterruptedException
      {
          shutdownNow(executors);
          awaitTermination(timeout, unit, executors);
      }
  
      public static void shutdownAndWait(long timeout, TimeUnit unit, Object ... executors) throws TimeoutException, InterruptedException
      {
          shutdownAndWait(timeout, unit, Arrays.asList(executors));
      }
  
      public static void shutdownNowAndWait(long timeout, TimeUnit unit, Object ... executors) throws TimeoutException, InterruptedException
      {
          shutdownNowAndWait(timeout, unit, Arrays.asList(executors));
      }
  }
  