| /* |
| * 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.Threading; |
| using Apache.NMS.ActiveMQ.Threads; |
| using NUnit.Framework; |
| |
| namespace Apache.NMS.ActiveMQ.Test.Threads |
| { |
| [TestFixture] |
| public class CompositeTaskRunnerTest |
| { |
| class CountingTask : CompositeTask |
| { |
| private int count; |
| private int goal; |
| private string name; |
| |
| public CountingTask( string name, int goal ) |
| { |
| this.name = name; |
| this.goal = goal; |
| } |
| |
| public string Name |
| { |
| get { return name; } |
| } |
| |
| public int Count |
| { |
| get { return count; } |
| } |
| |
| public bool IsPending |
| { |
| get { return count != goal; } |
| } |
| |
| public bool Iterate() |
| { |
| return !( ++count == goal ); |
| } |
| } |
| |
| [Test] |
| public void TestCompositeTaskRunner() |
| { |
| |
| int attempts = 0; |
| |
| CompositeTaskRunner runner = new CompositeTaskRunner(); |
| |
| CountingTask task1 = new CountingTask("task1", 100); |
| CountingTask task2 = new CountingTask("task2", 200); |
| |
| runner.AddTask( task1 ); |
| runner.AddTask( task2 ); |
| |
| runner.Wakeup(); |
| |
| while( attempts++ != 10 ) |
| { |
| Thread.Sleep( 1000 ); |
| |
| if(task1.Count == 100 && task2.Count == 200) |
| { |
| break; |
| } |
| } |
| |
| Assert.IsTrue(task1.Count == 100); |
| Assert.IsTrue(task2.Count == 200); |
| |
| runner.RemoveTask(task1); |
| runner.RemoveTask(task2); |
| } |
| |
| [Test] |
| public void CompositeTaskRunnerDoesntHoldLockWhileCallingIterate() |
| { |
| object lockObj = new object(); |
| |
| // Start a task running that takes a shared lock during it's iterate. |
| CompositeTaskRunner runner = new CompositeTaskRunner(); |
| runner.AddTask(new LockingTask(lockObj)); |
| |
| // Start a separate thread that holds that same lock whilst manipulating the CompositeTaskRunner (See InactivityMonitor for real example). |
| AutoResetEvent resetEvent = new AutoResetEvent(false); |
| |
| ThreadPool.QueueUserWorkItem(_ => |
| { |
| for (int i = 0; i < 10000; i++) |
| { |
| lock (lockObj) |
| { |
| var countingTask = new CountingTask("task1", 100); |
| runner.AddTask(countingTask); |
| runner.RemoveTask(countingTask); |
| } |
| } |
| |
| resetEvent.Set(); |
| }); |
| |
| // Wait for the second thread to finish 10000 attempts. |
| Assert.That(resetEvent.WaitOne(TimeSpan.FromSeconds(10)), "The secondary lock user didn't finish 10000 iterations in less than 10 seconds. Probably dead locked!"); |
| runner.Shutdown(); |
| } |
| |
| private class LockingTask : CompositeTask |
| { |
| private readonly object _lockObj; |
| |
| public LockingTask(object lockObj) |
| { |
| _lockObj = lockObj; |
| IsPending = true; |
| } |
| |
| public bool Iterate() |
| { |
| lock (_lockObj) |
| { |
| Thread.Sleep(10); |
| } |
| return true; |
| } |
| |
| public bool IsPending { get; private set; } |
| } |
| } |
| } |