#region License Information
/* HeuristicLab
* Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using HeuristicLab.Common;
namespace HeuristicLab.Clients.Hive {
public class TaskDownloader : IDisposable {
private IEnumerable taskIds;
private ConcurrentTaskDownloader taskDownloader;
private IDictionary results;
private bool exceptionOccured = false;
private Exception currentException;
private ReaderWriterLockSlim resultsLock = new ReaderWriterLockSlim();
public bool IsFinished {
get {
try {
resultsLock.EnterReadLock();
return results.Count == taskIds.Count();
}
finally { resultsLock.ExitReadLock(); }
}
}
public bool IsFaulted {
get {
return exceptionOccured;
}
}
public Exception Exception {
get {
return currentException;
}
}
public int FinishedCount {
get {
try {
resultsLock.EnterReadLock();
return results.Count;
}
finally { resultsLock.ExitReadLock(); }
}
}
public IDictionary Results {
get {
try {
resultsLock.EnterReadLock();
return results;
}
finally { resultsLock.ExitReadLock(); }
}
}
public TaskDownloader(IEnumerable jobIds) {
taskIds = jobIds;
taskDownloader = new ConcurrentTaskDownloader(Settings.Default.MaxParallelDownloads, Settings.Default.MaxParallelDownloads);
taskDownloader.ExceptionOccured += new EventHandler>(taskDownloader_ExceptionOccured);
results = new Dictionary();
}
public void StartAsync() {
foreach (Guid taskId in taskIds) {
taskDownloader.DownloadTaskDataAndTask(taskId,
(localTask, itemTask) => {
if (localTask != null && itemTask != null) {
HiveTask hiveTask = itemTask.CreateHiveTask();
hiveTask.Task = localTask;
try {
resultsLock.EnterWriteLock();
results.Add(localTask.Id, hiveTask);
}
finally { resultsLock.ExitWriteLock(); }
}
});
}
}
private void taskDownloader_ExceptionOccured(object sender, EventArgs e) {
OnExceptionOccured(e.Value);
}
public event EventHandler> ExceptionOccured;
private void OnExceptionOccured(Exception exception) {
exceptionOccured = true;
currentException = exception;
var handler = ExceptionOccured;
if (handler != null) handler(this, new EventArgs(exception));
}
#region IDisposable Members
public void Dispose() {
taskDownloader.ExceptionOccured -= new EventHandler>(taskDownloader_ExceptionOccured);
resultsLock.Dispose();
taskDownloader.Dispose();
}
#endregion
}
}