Mercurial > pub > ImplabNet
annotate Implab/AbstractPromise.cs @ 145:706fccb85524 v2
RC: cancellation support for promises + tests
| author | cin |
|---|---|
| date | Sun, 08 Mar 2015 02:52:27 +0300 |
| parents | 8c0b95069066 |
| children | 97fbbf816844 |
| rev | line source |
|---|---|
| 119 | 1 using System; |
| 2 using Implab.Parallels; | |
| 3 | |
| 4 namespace Implab { | |
| 144 | 5 public abstract class AbstractPromise : AbstractEvent<AbstractPromise.HandlerDescriptor>, IPromise { |
| 6 public struct HandlerDescriptor { | |
| 7 readonly Action m_handler; | |
| 8 readonly Action<Exception> m_error; | |
| 9 readonly Action<Exception> m_cancel; | |
| 10 readonly PromiseEventType m_mask; | |
| 119 | 11 |
| 144 | 12 public HandlerDescriptor(Action success, Action<Exception> error, Action<Exception> cancel) { |
| 13 m_handler = success; | |
| 14 m_error = error; | |
| 15 m_cancel = cancel; | |
| 16 m_mask = PromiseEventType.Success; | |
| 17 } | |
| 125 | 18 |
| 144 | 19 public HandlerDescriptor(Action handler, PromiseEventType mask) { |
| 20 m_handler = handler; | |
| 145 | 21 m_error = null; |
| 22 m_cancel = null; | |
| 144 | 23 m_mask = mask; |
| 24 } | |
| 119 | 25 |
| 144 | 26 public void SignalSuccess() { |
| 145 | 27 if ((m_mask & PromiseEventType.Success) != 0 && m_handler != null) { |
| 144 | 28 try { |
| 29 m_handler(); | |
| 30 } catch (Exception err) { | |
| 31 // avoid calling handler twice in case of error | |
| 32 if (m_error != null) | |
| 33 SignalError(err); | |
| 34 } | |
| 35 } | |
| 36 } | |
| 119 | 37 |
| 144 | 38 public void SignalError(Exception err) { |
| 39 if (m_error != null) { | |
| 40 try { | |
| 41 m_error(err); | |
| 42 // Analysis disable once EmptyGeneralCatchClause | |
| 43 } catch { | |
| 44 } | |
| 145 | 45 } else if ((m_mask & PromiseEventType.Error ) != 0 && m_handler != null) { |
| 144 | 46 try { |
| 47 m_handler(); | |
| 48 // Analysis disable once EmptyGeneralCatchClause | |
| 49 } catch { | |
| 50 } | |
| 51 } | |
| 119 | 52 } |
| 53 | |
| 144 | 54 public void SignalCancel(Exception reason) { |
| 55 if (m_cancel != null) { | |
| 56 try { | |
| 57 m_cancel(reason); | |
| 58 } catch (Exception err) { | |
| 59 SignalError(err); | |
| 60 } | |
| 145 | 61 } else if ( (m_mask & PromiseEventType.Cancelled) != 0 && m_handler != null) { |
| 144 | 62 try { |
| 63 m_handler(); | |
| 64 // Analysis disable once EmptyGeneralCatchClause | |
| 65 } catch { | |
| 66 } | |
| 67 } | |
| 119 | 68 } |
| 69 } | |
| 70 | |
| 71 | |
| 144 | 72 #region implemented abstract members of AbstractPromise |
| 119 | 73 |
| 144 | 74 protected override void SignalSuccess(HandlerDescriptor handler) { |
| 75 handler.SignalSuccess(); | |
| 119 | 76 } |
| 77 | |
| 144 | 78 protected override void SignalError(HandlerDescriptor handler, Exception error) { |
| 79 handler.SignalError(error); | |
| 119 | 80 } |
| 81 | |
| 144 | 82 protected override void SignalCancelled(HandlerDescriptor handler, Exception reason) { |
| 83 handler.SignalCancel(reason); | |
| 119 | 84 } |
| 85 | |
| 144 | 86 protected override Signal GetResolveSignal() { |
| 87 var signal = new Signal(); | |
| 88 On(signal.Set, PromiseEventType.All); | |
| 145 | 89 return signal; |
| 119 | 90 } |
| 91 | |
| 92 #endregion | |
| 93 | |
| 144 | 94 public Type PromiseType { |
| 95 get { | |
| 96 return typeof(void); | |
| 119 | 97 } |
| 98 } | |
| 99 | |
| 144 | 100 public IPromise On(Action success, Action<Exception> error, Action<Exception> cancel) { |
| 101 AddHandler(new HandlerDescriptor(success, error, cancel)); | |
| 102 return this; | |
| 103 } | |
| 104 | |
| 105 public IPromise On(Action success, Action<Exception> error) { | |
| 106 AddHandler(new HandlerDescriptor(success, error, null)); | |
| 107 return this; | |
| 119 | 108 } |
| 109 | |
| 144 | 110 public IPromise On(Action success) { |
| 111 AddHandler(new HandlerDescriptor(success, null, null)); | |
| 112 return this; | |
| 113 } | |
| 119 | 114 |
| 144 | 115 public IPromise On(Action handler, PromiseEventType events) { |
| 116 AddHandler(new HandlerDescriptor(handler,events)); | |
| 117 return this; | |
| 118 } | |
| 119 | 119 |
| 144 | 120 public IPromise<T> Cast<T>() { |
| 121 throw new InvalidCastException(); | |
| 119 | 122 } |
| 123 | |
| 124 public void Join() { | |
| 125 WaitResult(-1); | |
| 126 } | |
| 127 | |
| 144 | 128 public void Join(int timeout) { |
| 129 WaitResult(timeout); | |
| 119 | 130 } |
| 131 | |
| 144 | 132 protected void SetResult() { |
| 133 BeginSetResult(); | |
| 134 EndSetResult(); | |
|
138
f75cfa58e3d4
added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents:
130
diff
changeset
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135 } |
| 119 | 136 } |
| 137 } | |
| 138 |