| // 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. |
| |
| using System; |
| using System.Collections.Generic; |
| using System.Threading; |
| using System.Threading.Tasks; |
| using Org.Apache.REEF.Utilities.Diagnostics; |
| using Org.Apache.REEF.Utilities.Logging; |
| |
| namespace Org.Apache.REEF.Wake.Util |
| { |
| public sealed class FixedThreadPoolTaskService : ITaskService |
| { |
| private static readonly Logger LOGGER = Logger.GetLogger(typeof(FixedThreadPoolTaskService)); |
| |
| private readonly TaskFactory factory; |
| |
| private readonly List<Task> tasks = new List<Task>(); |
| private bool shuttingDown; |
| |
| internal FixedThreadPoolTaskService(int maxDegreeOfParallelism) |
| { |
| LimitedConcurrencyLevelTaskScheduler lcts = new LimitedConcurrencyLevelTaskScheduler(maxDegreeOfParallelism); |
| factory = new TaskFactory(lcts); |
| } |
| |
| public bool AwaitTermination(long n, TimeSpan unit) |
| { |
| Task[] allTasks; |
| lock (tasks) |
| { |
| if (tasks.Count == 0) |
| { |
| return true; |
| } |
| allTasks = tasks.ToArray(); |
| } |
| return Task.WaitAll(allTasks, unit); |
| } |
| |
| public void ShutdownNow() |
| { |
| Shutdown(); |
| } |
| |
| public void Shutdown() |
| { |
| lock (tasks) |
| { |
| shuttingDown = true; |
| } |
| } |
| |
| public Task<T> Submit<T>(Func<T> c) |
| { |
| Task<T> task = null; |
| lock (tasks) |
| { |
| if (shuttingDown) |
| { |
| Exceptions.Throw(new InvalidOperationException("Shutting down"), LOGGER); |
| } |
| |
| CancellationTokenSource cancellationTokenSource = new CancellationTokenSource(); |
| CancellationToken cancellationToken = cancellationTokenSource.Token; |
| task = factory.StartNew(c, cancellationToken); |
| tasks.Add(task); |
| } |
| return task; |
| } |
| |
| public void Execute(ThreadStart threadStart) |
| { |
| new Actionable(threadStart).Call(); |
| } |
| |
| internal void RemoveTask(Task task) |
| { |
| lock (tasks) |
| { |
| tasks.Remove(task); |
| } |
| } |
| } |
| } |