Mercurial > pub > ImplabNet
annotate Implab/AbstractPromise.cs @ 209:a867536c68fc v2
Bound promise to CancellationToken
Added new states to ExecutionSate enum.
Added Safe.Guard() method to handle cleanup of the result of the promise
| author | cin |
|---|---|
| date | Wed, 16 Nov 2016 03:06:08 +0300 |
| parents | 86187b01c4e0 |
| children | cbe10ac0731e |
| 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(); | |
|
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30 // Analysis disable once EmptyGeneralCatchClause |
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31 } catch { |
| 144 | 32 } |
| 33 } | |
| 34 } | |
| 119 | 35 |
| 144 | 36 public void SignalError(Exception err) { |
| 37 if (m_error != null) { | |
| 38 try { | |
| 39 m_error(err); | |
| 40 // Analysis disable once EmptyGeneralCatchClause | |
| 41 } catch { | |
| 42 } | |
| 145 | 43 } else if ((m_mask & PromiseEventType.Error ) != 0 && m_handler != null) { |
| 144 | 44 try { |
| 45 m_handler(); | |
| 46 // Analysis disable once EmptyGeneralCatchClause | |
| 47 } catch { | |
| 48 } | |
| 49 } | |
| 119 | 50 } |
| 51 | |
| 144 | 52 public void SignalCancel(Exception reason) { |
| 53 if (m_cancel != null) { | |
| 54 try { | |
| 55 m_cancel(reason); | |
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56 // Analysis disable once EmptyGeneralCatchClause |
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57 } catch { |
| 144 | 58 } |
| 145 | 59 } else if ( (m_mask & PromiseEventType.Cancelled) != 0 && m_handler != null) { |
| 144 | 60 try { |
| 61 m_handler(); | |
| 62 // Analysis disable once EmptyGeneralCatchClause | |
| 63 } catch { | |
| 64 } | |
| 65 } | |
| 119 | 66 } |
| 67 } | |
| 68 | |
| 69 | |
| 144 | 70 #region implemented abstract members of AbstractPromise |
| 119 | 71 |
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72 protected override void SignalHandler(HandlerDescriptor handler, int signal) { |
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73 switch (signal) { |
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74 case SUCCEEDED_STATE: |
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75 handler.SignalSuccess(); |
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76 break; |
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77 case REJECTED_STATE: |
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78 handler.SignalError(Error); |
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79 break; |
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80 case CANCELLED_STATE: |
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81 handler.SignalCancel(CancellationReason); |
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82 break; |
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83 default: |
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84 throw new InvalidOperationException(String.Format("Invalid promise signal: {0}", signal)); |
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85 } |
| 119 | 86 } |
| 87 | |
| 144 | 88 protected override Signal GetResolveSignal() { |
| 89 var signal = new Signal(); | |
| 90 On(signal.Set, PromiseEventType.All); | |
| 145 | 91 return signal; |
| 119 | 92 } |
| 93 | |
| 94 #endregion | |
| 95 | |
| 144 | 96 public Type PromiseType { |
| 97 get { | |
| 98 return typeof(void); | |
| 119 | 99 } |
| 100 } | |
| 101 | |
| 144 | 102 public IPromise On(Action success, Action<Exception> error, Action<Exception> cancel) { |
| 103 AddHandler(new HandlerDescriptor(success, error, cancel)); | |
| 104 return this; | |
| 105 } | |
| 106 | |
| 107 public IPromise On(Action success, Action<Exception> error) { | |
| 108 AddHandler(new HandlerDescriptor(success, error, null)); | |
| 109 return this; | |
| 119 | 110 } |
| 111 | |
| 144 | 112 public IPromise On(Action success) { |
| 113 AddHandler(new HandlerDescriptor(success, null, null)); | |
| 114 return this; | |
| 115 } | |
| 119 | 116 |
| 144 | 117 public IPromise On(Action handler, PromiseEventType events) { |
| 118 AddHandler(new HandlerDescriptor(handler,events)); | |
| 119 return this; | |
| 120 } | |
| 119 | 121 |
| 144 | 122 public IPromise<T> Cast<T>() { |
| 123 throw new InvalidCastException(); | |
| 119 | 124 } |
| 125 | |
| 126 public void Join() { | |
| 127 WaitResult(-1); | |
| 128 } | |
| 129 | |
| 144 | 130 public void Join(int timeout) { |
| 131 WaitResult(timeout); | |
| 119 | 132 } |
| 133 | |
| 144 | 134 protected void SetResult() { |
| 186 | 135 if(BeginSetResult()) |
| 136 EndSetResult(); | |
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137 } |
| 119 | 138 } |
| 139 } | |
| 140 |