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source: stable/HeuristicLab.Clients.Hive.JobManager/3.3/Views/RefreshableHiveJobView.cs @ 14186

Last change on this file since 14186 was 14186, checked in by swagner, 8 years ago

#2526: Updated year of copyrights in license headers

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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.ComponentModel;
24using System.Linq;
25using System.Text;
26using System.Threading;
27using System.Threading.Tasks;
28using System.Windows.Forms;
29using HeuristicLab.Collections;
30using HeuristicLab.Common;
31using HeuristicLab.Core;
32using HeuristicLab.MainForm;
33using HeuristicLab.MainForm.WindowsForms;
34using HeuristicLab.Optimization;
35using HeuristicLab.PluginInfrastructure;
36
37namespace HeuristicLab.Clients.Hive.JobManager.Views {
38  /// <summary>
39  /// The base class for visual representations of items.
40  /// </summary>
41  [View("Hive Job View")]
42  [Content(typeof(RefreshableJob), true)]
43  public partial class RefreshableHiveJobView : HeuristicLab.Core.Views.ItemView {
44    private HiveResourceSelectorDialog hiveResourceSelectorDialog;
45    private bool SuppressEvents { get; set; }
46    private object runCollectionViewLocker = new object();
47
48    public new RefreshableJob Content {
49      get { return (RefreshableJob)base.Content; }
50      set { base.Content = value; }
51    }
52
53    /// <summary>
54    /// Initializes a new instance of <see cref="ItemBaseView"/>.
55    /// </summary>
56    public RefreshableHiveJobView() {
57      InitializeComponent();
58    }
59
60    protected override void RegisterContentEvents() {
61      base.RegisterContentEvents();
62      Content.RefreshAutomaticallyChanged += new EventHandler(Content_RefreshAutomaticallyChanged);
63      Content.JobChanged += new EventHandler(Content_HiveExperimentChanged);
64      Content.IsControllableChanged += new EventHandler(Content_IsControllableChanged);
65      Content.JobStatisticsChanged += new EventHandler(Content_JobStatisticsChanged);
66      Content.ExceptionOccured += new EventHandler<EventArgs<Exception>>(Content_ExceptionOccured);
67      Content.StateLogListChanged += new EventHandler(Content_StateLogListChanged);
68      Content.HiveTasksChanged += new EventHandler(Content_HiveTasksChanged);
69      Content.ExecutionStateChanged += new EventHandler(Content_ExecutionStateChanged);
70      Content.ExecutionTimeChanged += new EventHandler(Content_ExecutionTimeChanged);
71      Content.Loaded += new EventHandler(Content_Loaded);
72      Content.TaskReceived += new EventHandler(Content_TaskReceived);
73      MainFormManager.GetMainForm<HeuristicLab.MainForm.WindowsForms.MainForm>().AddOperationProgressToView(this, Content.Progress);
74    }
75
76    protected override void DeregisterContentEvents() {
77      Content.RefreshAutomaticallyChanged -= new EventHandler(Content_RefreshAutomaticallyChanged);
78      Content.JobChanged -= new EventHandler(Content_HiveExperimentChanged);
79      Content.IsControllableChanged -= new EventHandler(Content_IsControllableChanged);
80      Content.JobStatisticsChanged -= new EventHandler(Content_JobStatisticsChanged);
81      Content.ExceptionOccured -= new EventHandler<EventArgs<Exception>>(Content_ExceptionOccured);
82      Content.StateLogListChanged -= new EventHandler(Content_StateLogListChanged);
83      Content.HiveTasksChanged -= new EventHandler(Content_HiveTasksChanged);
84      Content.ExecutionStateChanged -= new EventHandler(Content_ExecutionStateChanged);
85      Content.ExecutionTimeChanged -= new EventHandler(Content_ExecutionTimeChanged);
86      Content.Loaded -= new EventHandler(Content_Loaded);
87      Content.TaskReceived -= new EventHandler(Content_TaskReceived);
88      MainFormManager.GetMainForm<HeuristicLab.MainForm.WindowsForms.MainForm>().RemoveOperationProgressFromView(this, false);
89      DeregisterHiveExperimentEvents();
90      DeregisterHiveTasksEvents();
91      base.DeregisterContentEvents();
92    }
93
94    private void RegisterHiveExperimentEvents() {
95      Content.Job.PropertyChanged += new PropertyChangedEventHandler(HiveExperiment_PropertyChanged);
96    }
97
98    private void DeregisterHiveExperimentEvents() {
99      Content.Job.PropertyChanged -= new PropertyChangedEventHandler(HiveExperiment_PropertyChanged);
100    }
101
102    private void RegisterHiveTasksEvents() {
103      Content.HiveTasks.ItemsAdded += new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_ItemsAdded);
104      Content.HiveTasks.ItemsRemoved += new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_ItemsRemoved);
105      Content.HiveTasks.CollectionReset += new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_CollectionReset);
106    }
107    private void DeregisterHiveTasksEvents() {
108      Content.HiveTasks.ItemsAdded -= new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_ItemsAdded);
109      Content.HiveTasks.ItemsRemoved -= new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_ItemsRemoved);
110      Content.HiveTasks.CollectionReset -= new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_CollectionReset);
111    }
112
113    protected override void OnContentChanged() {
114      base.OnContentChanged();
115      SuppressEvents = true;
116      try {
117        if (Content == null) {
118          nameTextBox.Text = string.Empty;
119          executionTimeTextBox.Text = string.Empty;
120          resourceNamesTextBox.Text = string.Empty;
121          refreshAutomaticallyCheckBox.Checked = false;
122          lock (runCollectionViewLocker) {
123            runCollectionViewHost.Content = null;
124          }
125          logView.Content = null;
126          jobsTreeView.Content = null;
127          hiveExperimentPermissionListView.Content = null;
128          stateLogViewHost.Content = null;
129        } else {
130          nameTextBox.Text = Content.Job.Name;
131          executionTimeTextBox.Text = Content.ExecutionTime.ToString();
132          resourceNamesTextBox.Text = Content.Job.ResourceNames;
133          refreshAutomaticallyCheckBox.Checked = Content.RefreshAutomatically;
134          logView.Content = Content.Log;
135          lock (runCollectionViewLocker) {
136            runCollectionViewHost.Content = GetAllRunsFromJob(Content);
137          }
138        }
139      }
140      finally {
141        SuppressEvents = false;
142      }
143      hiveExperimentPermissionListView.Content = null; // has to be filled by refresh button
144      Content_JobStatisticsChanged(this, EventArgs.Empty);
145      Content_HiveExperimentChanged(this, EventArgs.Empty);
146      Content_HiveTasksChanged(this, EventArgs.Empty);
147      Content_StateLogListChanged(this, EventArgs.Empty);
148      HiveExperiment_PropertyChanged(this, new PropertyChangedEventArgs("Id"));
149      SetEnabledStateOfControls();
150    }
151
152    protected override void OnLockedChanged() {
153      base.OnLockedChanged();
154      executionTimeTextBox.Enabled = !Locked;
155      jobsTextBox.Enabled = !Locked;
156      calculatingTextBox.Enabled = !Locked;
157      finishedTextBox.Enabled = !Locked;
158      tabControl.Enabled = !Locked;
159      nameTextBox.Enabled = !Locked;
160      resourceNamesTextBox.Enabled = !Locked;
161      searchButton.Enabled = !Locked;
162      jobsTreeView.Enabled = !Locked;
163      refreshAutomaticallyCheckBox.Enabled = !Locked;
164      refreshButton.Enabled = !Locked;
165      UnloadButton.Enabled = !Locked;
166      startButton.Enabled = !Locked;
167      pauseButton.Enabled = !Locked;
168      stopButton.Enabled = !Locked;
169      resetButton.Enabled = !Locked;
170    }
171
172    protected override void SetEnabledStateOfControls() {
173      base.SetEnabledStateOfControls();
174      if (!Locked) {
175        executionTimeTextBox.Enabled = Content != null;
176        jobsTextBox.ReadOnly = true;
177        calculatingTextBox.ReadOnly = true;
178        finishedTextBox.ReadOnly = true;
179
180        if (Content != null) {
181          bool alreadyUploaded = Content.Id != Guid.Empty;
182          bool jobsLoaded = Content.HiveTasks != null && Content.HiveTasks.All(x => x.Task.Id != Guid.Empty);
183          tabControl.Enabled = !Content.IsProgressing;
184
185          this.nameTextBox.ReadOnly = !Content.IsControllable || Content.ExecutionState != ExecutionState.Prepared || alreadyUploaded || Content.IsProgressing;
186          this.resourceNamesTextBox.ReadOnly = !Content.IsControllable || Content.ExecutionState != ExecutionState.Prepared || alreadyUploaded || Content.IsProgressing;
187          this.searchButton.Enabled = Content.IsControllable && Content.ExecutionState == ExecutionState.Prepared && !alreadyUploaded && !Content.IsProgressing;
188          this.jobsTreeView.ReadOnly = !Content.IsControllable || Content.ExecutionState != ExecutionState.Prepared || alreadyUploaded || Content.IsProgressing;
189
190          this.refreshAutomaticallyCheckBox.Enabled = Content.IsControllable && alreadyUploaded && jobsLoaded && Content.ExecutionState == ExecutionState.Started && !Content.IsProgressing;
191          this.refreshButton.Enabled = Content.IsDownloadable && alreadyUploaded && !Content.IsProgressing;
192
193          this.UnloadButton.Enabled = Content.HiveTasks != null && Content.HiveTasks.Count > 0 && alreadyUploaded && !Content.IsProgressing;
194        }
195        SetEnabledStateOfExecutableButtons();
196        tabControl_SelectedIndexChanged(this, EventArgs.Empty); // ensure sharing tabpage is disabled
197      }
198    }
199
200    protected override void OnClosed(FormClosedEventArgs e) {
201      if (Content != null) {
202        if (Content.RefreshAutomatically)
203          Content.StopResultPolling();
204      }
205      base.OnClosed(e);
206    }
207
208    #region Content Events
209    void Content_TaskReceived(object sender, EventArgs e) {
210      lock (runCollectionViewLocker) {
211        runCollectionViewHost.Content = GetAllRunsFromJob(Content);
212      }
213    }
214
215    private void HiveTasks_ItemsAdded(object sender, CollectionItemsChangedEventArgs<HiveTask> e) {
216      if (InvokeRequired)
217        Invoke(new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_ItemsAdded), sender, e);
218      else {
219        SetEnabledStateOfControls();
220      }
221    }
222
223    private void HiveTasks_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<HiveTask> e) {
224      if (InvokeRequired)
225        Invoke(new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_ItemsRemoved), sender, e);
226      else {
227        SetEnabledStateOfControls();
228      }
229    }
230
231    private void HiveTasks_CollectionReset(object sender, CollectionItemsChangedEventArgs<HiveTask> e) {
232      if (InvokeRequired)
233        Invoke(new CollectionItemsChangedEventHandler<HiveTask>(HiveTasks_CollectionReset), sender, e);
234      else {
235        SetEnabledStateOfControls();
236      }
237    }
238
239    private void Content_ExecutionStateChanged(object sender, EventArgs e) {
240      if (InvokeRequired)
241        Invoke(new EventHandler(Content_ExecutionStateChanged), sender, e);
242      else
243        SetEnabledStateOfControls();
244    }
245
246    private void Content_ExecutionTimeChanged(object sender, EventArgs e) {
247      if (InvokeRequired)
248        Invoke(new EventHandler(Content_ExecutionTimeChanged), sender, e);
249      else
250        executionTimeTextBox.Text = Content.ExecutionTime.ToString();
251    }
252    private void Content_RefreshAutomaticallyChanged(object sender, EventArgs e) {
253      if (InvokeRequired)
254        Invoke(new EventHandler(Content_RefreshAutomaticallyChanged), sender, e);
255      else {
256        refreshAutomaticallyCheckBox.Checked = Content.RefreshAutomatically;
257        SetEnabledStateOfControls();
258      }
259    }
260    private void Content_HiveTasksChanged(object sender, EventArgs e) {
261      if (InvokeRequired)
262        Invoke(new EventHandler(Content_HiveTasksChanged), sender, e);
263      else {
264        if (Content != null && Content.HiveTasks != null) {
265          jobsTreeView.Content = Content.HiveTasks;
266          RegisterHiveTasksEvents();
267        } else {
268          jobsTreeView.Content = null;
269        }
270        SetEnabledStateOfControls();
271      }
272    }
273
274    void Content_Loaded(object sender, EventArgs e) {
275      lock (runCollectionViewLocker) {
276        runCollectionViewHost.Content = GetAllRunsFromJob(Content);
277      }
278    }
279
280    private void Content_HiveExperimentChanged(object sender, EventArgs e) {
281      if (Content != null && Content.Job != null) {
282        RegisterHiveExperimentEvents();
283      }
284    }
285    private void Content_IsControllableChanged(object sender, EventArgs e) {
286      SetEnabledStateOfControls();
287    }
288    private void Content_JobStatisticsChanged(object sender, EventArgs e) {
289      if (InvokeRequired)
290        Invoke(new EventHandler(Content_JobStatisticsChanged), sender, e);
291      else {
292        if (Content != null) {
293          jobsTextBox.Text = (Content.Job.JobCount - Content.Job.CalculatingCount - Content.Job.FinishedCount).ToString();
294          calculatingTextBox.Text = Content.Job.CalculatingCount.ToString();
295          finishedTextBox.Text = Content.Job.FinishedCount.ToString();
296        } else {
297          jobsTextBox.Text = "0";
298          calculatingTextBox.Text = "0";
299          finishedTextBox.Text = "0";
300        }
301      }
302    }
303    private void Content_ExceptionOccured(object sender, EventArgs<Exception> e) {
304      if (InvokeRequired)
305        Invoke(new EventHandler<EventArgs<Exception>>(Content_ExceptionOccured), sender, e);
306      else {
307        //don't show the error dialog when downloading tasks, the HiveClient will throw an exception and the dialog will be shown then
308        if (sender.GetType() != typeof(ConcurrentTaskDownloader<ItemTask>) && sender.GetType() != typeof(TaskDownloader)) {
309          ErrorHandling.ShowErrorDialog(this, e.Value);
310        }
311      }
312    }
313    private void Content_StateLogListChanged(object sender, EventArgs e) {
314      if (InvokeRequired)
315        Invoke(new EventHandler(Content_StateLogListChanged), sender, e);
316      else {
317        UpdateStateLogList();
318      }
319    }
320
321    private void UpdateStateLogList() {
322      if (Content != null && this.Content.Job != null) {
323        stateLogViewHost.Content = this.Content.StateLogList;
324      } else {
325        stateLogViewHost.Content = null;
326      }
327    }
328
329    private void HiveExperiment_PropertyChanged(object sender, PropertyChangedEventArgs e) {
330      if (this.Content != null && e.PropertyName == "Id") this.hiveExperimentPermissionListView.HiveExperimentId = this.Content.Job.Id;
331    }
332    #endregion
333
334    #region Control events
335    private void searchButton_Click(object sender, EventArgs e) {
336      if (hiveResourceSelectorDialog == null)
337        hiveResourceSelectorDialog = new HiveResourceSelectorDialog();
338      if (hiveResourceSelectorDialog.ShowDialog(this) == DialogResult.OK) {
339        StringBuilder sb = new StringBuilder();
340        foreach (Resource resource in hiveResourceSelectorDialog.GetSelectedResources()) {
341          sb.Append(resource.Name);
342          sb.Append(";");
343        }
344        resourceNamesTextBox.Text = sb.ToString();
345        if (Content.Job.ResourceNames != resourceNamesTextBox.Text)
346          Content.Job.ResourceNames = resourceNamesTextBox.Text;
347      }
348    }
349
350    private void startButton_Click(object sender, EventArgs e) {
351      if (nameTextBox.Text.Trim() == string.Empty) {
352        MessageBox.Show("Please enter a name for the job before uploading it!", "HeuristicLab Hive Job Manager", MessageBoxButtons.OK, MessageBoxIcon.Information);
353      } else if (Content.ExecutionState == ExecutionState.Paused) {
354        var task = System.Threading.Tasks.Task.Factory.StartNew(ResumeJobAsync, Content);
355        task.ContinueWith((t) => {
356          Content.Progress.Finish();
357          MessageBox.Show("An error occured resuming the job. See the log for more information.", "HeuristicLab Hive Job Manager", MessageBoxButtons.OK, MessageBoxIcon.Error);
358          Content.Log.LogException(t.Exception);
359        }, TaskContinuationOptions.OnlyOnFaulted);
360      } else {
361        HiveClient.StartJob((Exception ex) => ErrorHandling.ShowErrorDialog(this, "Start failed.", ex), Content, new CancellationToken());
362      }
363    }
364
365    private void pauseButton_Click(object sender, EventArgs e) {
366      var task = System.Threading.Tasks.Task.Factory.StartNew(PauseJobAsync, Content);
367      task.ContinueWith((t) => {
368        Content.Progress.Finish();
369        MessageBox.Show("An error occured pausing the job. See the log for more information.", "HeuristicLab Hive Job Manager", MessageBoxButtons.OK, MessageBoxIcon.Error);
370        Content.Log.LogException(t.Exception);
371      }, TaskContinuationOptions.OnlyOnFaulted);
372    }
373
374    private void stopButton_Click(object sender, EventArgs e) {
375      var task = System.Threading.Tasks.Task.Factory.StartNew(StopJobAsync, Content);
376      task.ContinueWith((t) => {
377        Content.Progress.Finish();
378        MessageBox.Show("An error occured stopping the job. See the log for more information.", "HeuristicLab Hive Job Manager", MessageBoxButtons.OK, MessageBoxIcon.Error);
379        Content.Log.LogException(t.Exception);
380      }, TaskContinuationOptions.OnlyOnFaulted);
381    }
382    private void resetButton_Click(object sender, EventArgs e) { }
383
384    private void PauseJobAsync(object job) {
385      Content.Progress.Start("Pausing job...");
386      HiveClient.PauseJob((RefreshableJob)job);
387      Content.Progress.Finish();
388    }
389
390    private void StopJobAsync(object job) {
391      Content.Progress.Start("Stopping job...");
392      HiveClient.StopJob((RefreshableJob)job);
393      Content.Progress.Finish();
394    }
395
396    private void ResumeJobAsync(object job) {
397      Content.Progress.Start("Resuming job...");
398      HiveClient.ResumeJob((RefreshableJob)job);
399      Content.Progress.Finish();
400    }
401
402    private void nameTextBox_Validated(object sender, EventArgs e) {
403      if (!SuppressEvents && Content.Job != null && Content.Job.Name != nameTextBox.Text)
404        Content.Job.Name = nameTextBox.Text;
405    }
406
407    private void resourceNamesTextBox_Validated(object sender, EventArgs e) {
408      if (!SuppressEvents && Content.Job != null && Content.Job.ResourceNames != resourceNamesTextBox.Text)
409        Content.Job.ResourceNames = resourceNamesTextBox.Text;
410    }
411
412    private void refreshAutomaticallyCheckBox_CheckedChanged(object sender, EventArgs e) {
413      if (Content != null && !SuppressEvents) Content.RefreshAutomatically = refreshAutomaticallyCheckBox.Checked;
414    }
415
416    private void refreshButton_Click(object sender, EventArgs e) {
417      var invoker = new Action<RefreshableJob>(HiveClient.LoadJob);
418      invoker.BeginInvoke(Content, (ar) => {
419        try {
420          invoker.EndInvoke(ar);
421        }
422        catch (Exception ex) {
423          ThreadPool.QueueUserWorkItem(delegate(object exception) { ErrorHandling.ShowErrorDialog(this, (Exception)exception); }, ex);
424        }
425      }, null);
426    }
427
428    private void refreshPermissionsButton_Click(object sender, EventArgs e) {
429      if (this.Content.Job.Id == Guid.Empty) {
430        MessageBox.Show("You have to upload the Job first before you can share it.", "HeuristicLab Hive Job Manager", MessageBoxButtons.OK, MessageBoxIcon.Information);
431      } else {
432        hiveExperimentPermissionListView.Content = HiveClient.GetJobPermissions(this.Content.Job.Id);
433      }
434    }
435    #endregion
436
437    #region Helpers
438    private void SetEnabledStateOfExecutableButtons() {
439      if (Content == null) {
440        startButton.Enabled = pauseButton.Enabled = stopButton.Enabled = resetButton.Enabled = false;
441      } else {
442        startButton.Enabled = Content.IsControllable && Content.HiveTasks != null && Content.HiveTasks.Count > 0 && (Content.ExecutionState == ExecutionState.Prepared || Content.ExecutionState == ExecutionState.Paused) && !Content.IsProgressing;
443        pauseButton.Enabled = Content.IsControllable && Content.ExecutionState == ExecutionState.Started && !Content.IsProgressing;
444        stopButton.Enabled = Content.IsControllable && Content.ExecutionState == ExecutionState.Started && !Content.IsProgressing;
445        resetButton.Enabled = false;
446      }
447    }
448    #endregion
449
450    #region Drag & Drop
451    private void jobsTreeView_DragOver(object sender, DragEventArgs e) {
452      jobsTreeView_DragEnter(sender, e);
453    }
454
455    private void jobsTreeView_DragEnter(object sender, DragEventArgs e) {
456      e.Effect = DragDropEffects.None;
457      var obj = (IDeepCloneable)e.Data.GetData(Constants.DragDropDataFormat);
458
459      Type objType = obj.GetType();
460      if (ItemTask.IsTypeSupported(objType)) {
461        if (Content.Id != Guid.Empty) e.Effect = DragDropEffects.None;
462        else if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link;  // ALT key
463        else if (e.AllowedEffect.HasFlag(DragDropEffects.Copy)) e.Effect = DragDropEffects.Copy;
464      }
465    }
466
467    private void jobsTreeView_DragDrop(object sender, DragEventArgs e) {
468      if (e.Effect != DragDropEffects.None) {
469        var obj = (IItem)e.Data.GetData(Constants.DragDropDataFormat);
470
471        IItem newObj = null;
472        if (e.Effect.HasFlag(DragDropEffects.Copy)) {
473          newObj = (IItem)obj.Clone();
474        } else {
475          newObj = obj;
476        }
477
478        //IOptimizer and IExecutables need some special care
479        if (newObj is IOptimizer) {
480          ((IOptimizer)newObj).Runs.Clear();
481        }
482        if (newObj is IExecutable) {
483          IExecutable exec = (IExecutable)newObj;
484          if (exec.ExecutionState != ExecutionState.Prepared) {
485            exec.Prepare();
486          }
487        }
488
489        ItemTask hiveTask = ItemTask.GetItemTaskForItem(newObj);
490        Content.HiveTasks.Add(hiveTask.CreateHiveTask());
491      }
492    }
493    #endregion
494
495    private void tabControl_SelectedIndexChanged(object sender, EventArgs e) {
496      if (tabControl.SelectedTab == permissionTabPage) {
497        if (!Content.IsSharable) {
498          MessageBox.Show("Unable to load permissions. You have insufficient access privileges.", "HeuristicLab Hive Job Manager", MessageBoxButtons.OK, MessageBoxIcon.Information);
499          tabControl.SelectedTab = tasksTabPage;
500        }
501      }
502    }
503
504    private RunCollection GetAllRunsFromJob(RefreshableJob job) {
505      if (job != null) {
506        RunCollection runs = new RunCollection() { OptimizerName = job.ItemName };
507
508        foreach (HiveTask subTask in job.HiveTasks) {
509          if (subTask is OptimizerHiveTask) {
510            OptimizerHiveTask ohTask = subTask as OptimizerHiveTask;
511            ohTask.ExecuteReadActionOnItemTask(new Action(delegate() {
512              runs.AddRange(ohTask.ItemTask.Item.Runs);
513            }));
514          }
515        }
516        return runs;
517      } else {
518        return null;
519      }
520    }
521
522    private void UnloadButton_Click(object sender, EventArgs e) {
523      Content.Unload();
524      runCollectionViewHost.Content = null;
525      stateLogViewHost.Content = null;
526      hiveExperimentPermissionListView.Content = null;
527      jobsTreeView.Content = null;
528
529      SetEnabledStateOfControls();
530    }
531  }
532}
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