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.Callable;
  import java.util.concurrent.RunnableFuture;
  
  import org.apache.cassandra.utils.WithResources;
  import org.apache.cassandra.utils.concurrent.Future;
  
  /**
   * This class inherits Executor best practices from {@link ThreadPoolExecutorBase}
   * and {@link ThreadPoolExecutorBuilder}. Most Cassandra executors should use or extend this.
   *
   * This class' addition is to abstract the semantics of task encapsulation to handle
   * exceptions and {@link ExecutorLocals}. See {@link TaskFactory} for more detail.
   */
  public class ThreadPoolExecutorPlus extends ThreadPoolExecutorBase implements ExecutorPlus
  {
      final TaskFactory taskFactory;
  
      ThreadPoolExecutorPlus(ThreadPoolExecutorBuilder<? extends ThreadPoolExecutorPlus> builder)
      {
          this(builder, TaskFactory.standard());
      }
  
      ThreadPoolExecutorPlus(ThreadPoolExecutorBuilder<? extends ThreadPoolExecutorPlus> builder, TaskFactory taskFactory)
      {
          super(builder);
          this.taskFactory = taskFactory;
      }
  
      private <T extends Runnable> T addTask(T task)
      {
          super.execute(task);
          return task;
      }
  
      @Override
      public void execute(Runnable run)
      {
          addTask(taskFactory.toExecute(run));
      }
  
      @Override
      public void execute(WithResources withResources, Runnable run)
      {
          addTask(taskFactory.toExecute(withResources, run));
      }
  
      @Override
      public Future<?> submit(Runnable run)
      {
          return addTask(taskFactory.toSubmit(run));
      }
  
      @Override
      public <T> Future<T> submit(Runnable run, T result)
      {
          return addTask(taskFactory.toSubmit(run, result));
      }
  
      @Override
      public <T> Future<T> submit(Callable<T> call)
      {
          return addTask(taskFactory.toSubmit(call));
      }
  
      @Override
      public <T> Future<T> submit(WithResources withResources, Runnable run, T result)
      {
          return addTask(taskFactory.toSubmit(withResources, run, result));
      }
  
      @Override
      public Future<?> submit(WithResources withResources, Runnable run)
      {
          return addTask(taskFactory.toSubmit(withResources, run));
      }
  
      @Override
      public <T> Future<T> submit(WithResources withResources, Callable<T> call)
      {
          return addTask(taskFactory.toSubmit(withResources, call));
      }
  
      @Override
      public boolean inExecutor()
      {
          return Thread.currentThread().getThreadGroup() == getThreadFactory().threadGroup;
      }
  
      @Override
      protected <T> RunnableFuture<T> newTaskFor(Runnable runnable, T value)
      {
          return taskFactory.toSubmit(runnable, value);
      }
  
      @Override
      protected <T> RunnableFuture<T> newTaskFor(Callable<T> callable)
      {
          return taskFactory.toSubmit(callable);
      }
  }
  