1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.Threading;
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25 | using HeuristicLab.Common;
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26 |
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27 | namespace HeuristicLab.Clients.Hive {
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28 | internal class JobResultPoller {
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29 | private bool stopRequested { get; set; }
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30 | private AutoResetEvent waitHandle;
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31 | private Thread thread;
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32 |
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33 | private HiveJob hiveJob;
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34 | public HiveJob HiveJob {
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35 | get { return hiveJob; }
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36 | set { hiveJob = value; }
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37 | }
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38 |
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39 | private TimeSpan interval;
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40 | public TimeSpan Interval {
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41 | get { return interval; }
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42 | set { interval = value; }
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43 | }
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44 |
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45 | private bool isPolling;
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46 | public bool IsPolling {
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47 | get { return isPolling; }
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48 | set {
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49 | if (isPolling != value) {
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50 | isPolling = value;
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51 | OnIsPollingChanged();
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52 | }
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53 | }
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54 | }
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55 |
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56 | public JobResultPoller(HiveJob hiveJob, TimeSpan interval) {
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57 | this.isPolling = false;
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58 | this.hiveJob = hiveJob;
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59 | this.interval = interval;
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60 | }
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61 |
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62 | public void Start() {
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63 | stopRequested = false;
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64 | thread = new Thread(RunPolling);
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65 | thread.Start();
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66 | IsPolling = true;
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67 | }
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68 |
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69 | public void Stop() {
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70 | // use AutoResetEvent.Set instead if Thread.Interrupt because its much cleaner
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71 | stopRequested = true;
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72 | waitHandle.Set();
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73 | IsPolling = false;
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74 | thread = null;
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75 | }
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76 |
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77 | public void RunPolling() {
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78 | try {
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79 | waitHandle = new AutoResetEvent(false);
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80 | while (!stopRequested) {
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81 | OnPollingStarted();
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82 | FetchJobResults();
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83 | OnPollingFinished();
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84 | waitHandle.WaitOne(Interval);
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85 | }
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86 | waitHandle.Close();
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87 | }
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88 | catch (Exception e) {
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89 | OnExceptionOccured(e);
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90 | }
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91 | }
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92 |
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93 | private void FetchJobResults() {
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94 | ServiceLocator.Instance.CallHiveService(service => {
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95 | IEnumerable<LightweightJob> response = service.GetLightweightChildJobs(hiveJob.Job.Id, true, true);
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96 | OnJobResultsReceived(response);
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97 | });
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98 | }
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99 |
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100 | public event EventHandler<EventArgs<IEnumerable<LightweightJob>>> JobResultsReceived;
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101 | private void OnJobResultsReceived(IEnumerable<LightweightJob> lightweightJobs) {
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102 | var handler = JobResultsReceived;
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103 | if (handler != null) handler(this, new EventArgs<IEnumerable<LightweightJob>>(lightweightJobs));
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104 | }
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105 |
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106 | public event EventHandler<EventArgs<Exception>> ExceptionOccured;
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107 | private void OnExceptionOccured(Exception e) {
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108 | var handler = ExceptionOccured;
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109 | if (handler != null) handler(this, new EventArgs<Exception>(e));
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110 | }
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111 |
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112 | public event EventHandler IsPollingChanged;
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113 | private void OnIsPollingChanged() {
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114 | var handler = IsPollingChanged;
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115 | if (handler != null) handler(this, EventArgs.Empty);
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116 | }
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117 | public event EventHandler PollingStarted;
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118 | private void OnPollingStarted() {
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119 | var handler = PollingStarted;
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120 | if (handler != null) handler(this, EventArgs.Empty);
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121 | }
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122 | public event EventHandler PollingFinished;
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123 | private void OnPollingFinished() {
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124 | var handler = PollingFinished;
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125 | if (handler != null) handler(this, EventArgs.Empty);
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126 | }
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127 | }
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128 | }
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