Mercurial > pub > ImplabNet
annotate Implab/TaskController.cs @ 187:dd4a3590f9c6 ref20160224
Reworked cancelation handling, if the cancel handler isn't specified the OperationCanceledException will be handled by the error handler
Any unhandled OperationCanceledException will cause the promise cancelation
| author | cin |
|---|---|
| date | Tue, 19 Apr 2016 17:35:20 +0300 |
| parents | f75cfa58e3d4 |
| children |
| rev | line source |
|---|---|
| 7 | 1 using System; |
| 2 using System.Collections.Generic; | |
| 3 using System.Linq; | |
| 4 using System.Text; | |
| 5 using System.Threading; | |
| 6 | |
| 7 namespace Implab | |
| 8 { | |
| 9 /// <summary> | |
| 10 /// This class allows to interact with asyncronuos task. | |
| 11 /// </summary> | |
| 12 /// <remarks> | |
| 13 /// Members of this object are thread safe. | |
| 14 /// </remarks> | |
| 25 | 15 public class TaskController: IProgressNotifier, ITaskController |
| 7 | 16 { |
| 10 | 17 readonly object m_lock; |
| 7 | 18 string m_message; |
| 19 | |
| 20 float m_current; | |
| 21 float m_max; | |
| 22 | |
| 12 | 23 bool m_cancelled; |
| 24 | |
| 25 | 25 public event EventHandler Cancelled; |
| 7 | 26 public event EventHandler<ValueEventArgs<string>> MessageUpdated; |
| 27 public event EventHandler<ValueEventArgs<float>> ProgressUpdated; | |
| 28 public event EventHandler<ProgressInitEventArgs> ProgressInit; | |
| 29 | |
| 30 public TaskController() | |
| 31 { | |
| 32 m_lock = new Object(); | |
| 33 } | |
| 34 | |
| 35 public string Message | |
| 36 { | |
| 37 get | |
| 38 { | |
| 39 lock (m_lock) | |
| 40 return m_message; | |
| 41 } | |
| 42 set | |
| 43 { | |
| 44 lock (m_lock) | |
| 45 { | |
| 46 m_message = value; | |
| 47 OnMessageUpdated(); | |
| 48 } | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 public float CurrentProgress | |
| 53 { | |
| 54 get | |
| 55 { | |
| 56 lock (m_lock) | |
| 57 return m_current; | |
| 58 } | |
| 59 set | |
| 60 { | |
| 61 lock (m_lock) | |
| 62 { | |
| 63 var prev = m_current; | |
| 64 m_current = value; | |
| 65 if (m_current >= m_max) | |
| 66 m_current = m_max; | |
| 67 if (m_current != prev) | |
| 68 OnProgressUpdated(); | |
| 69 } | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 public void InitProgress(float current, float max, string message) | |
| 74 { | |
| 75 if (max < 0) | |
| 76 throw new ArgumentOutOfRangeException("max"); | |
| 77 if (current < 0 || current > max) | |
| 78 throw new ArgumentOutOfRangeException("current"); | |
| 79 | |
| 80 lock(m_lock) { | |
| 81 m_current = current; | |
| 82 m_max = max; | |
| 83 m_message = message; | |
| 84 OnProgressInit(); | |
| 85 } | |
| 86 } | |
| 87 | |
| 25 | 88 public bool IsCancelled { |
| 12 | 89 get { |
| 90 lock (m_lock) | |
| 91 return m_cancelled; | |
| 92 } | |
| 93 } | |
| 94 | |
| 76 | 95 public void Cancel() { |
| 12 | 96 lock (m_lock) { |
| 76 | 97 if (!m_cancelled) |
| 12 | 98 m_cancelled = true; |
| 99 } | |
| 100 } | |
| 101 | |
|
138
f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
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diff
changeset
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102 public void Cancel(Exception reason) { |
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f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
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diff
changeset
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103 lock (m_lock) { |
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f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
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changeset
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104 if (!m_cancelled) |
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f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
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105 m_cancelled = true; |
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f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
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changeset
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106 } |
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f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
76
diff
changeset
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107 } |
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f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
76
diff
changeset
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108 |
| 25 | 109 protected virtual void OnCancelled() { |
| 110 var temp = Cancelled; | |
| 111 if (temp != null) { | |
| 112 temp(this,new EventArgs()); | |
| 113 } | |
| 114 } | |
| 115 | |
| 7 | 116 protected virtual void OnMessageUpdated() |
| 117 { | |
| 118 var temp = MessageUpdated; | |
| 119 if (temp != null) | |
| 120 { | |
| 121 temp(this, new ValueEventArgs<string>(m_message)); | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 protected virtual void OnProgressUpdated() | |
| 126 { | |
| 127 var temp = ProgressUpdated; | |
| 128 if (temp != null) | |
| 129 { | |
| 130 temp(this,new ValueEventArgs<float>(m_current)); | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 protected virtual void OnProgressInit() | |
| 135 { | |
| 136 var temp = ProgressInit; | |
| 137 if (temp != null) | |
| 138 { | |
| 139 temp(this, new ProgressInitEventArgs(m_current,m_max, m_message)); | |
| 140 } | |
| 141 } | |
| 142 } | |
| 143 } |