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annotate Implab/FailedPromise.cs @ 209:a867536c68fc v2

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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 4d9830a9bbb8
children cbe10ac0731e
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4d9830a9bbb8 Added 'Fail' method to RunnableComponent which allows component to move from
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1 using System;
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2 using System.Reflection;
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3
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4 namespace Implab {
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5 public class FailedPromise : IPromise {
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6 readonly Exception m_error;
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7 public FailedPromise(Exception error) {
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8 Safe.ArgumentNotNull(error, "error");
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9 m_error = error;
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10 }
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11
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12 #region IPromise implementation
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13
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14 public IPromise On(Action success, Action<Exception> error, Action<Exception> cancel) {
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15 if (error != null) {
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16 try {
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17 error(m_error);
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18 // Analysis disable once EmptyGeneralCatchClause
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19 } catch {
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20 }
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21 }
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22 return this;
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23 }
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24
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25 public IPromise On(Action success, Action<Exception> error) {
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26 if (error != null) {
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27 try {
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28 error(m_error);
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29 // Analysis disable once EmptyGeneralCatchClause
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30 } catch {
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31 }
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32 }
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33 return this;
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34 }
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35
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36 public IPromise On(Action success) {
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37 return this;
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38 }
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39
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40 public IPromise On(Action handler, PromiseEventType events) {
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41 if ((events & PromiseEventType.Error) != 0) {
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42 try {
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43 handler();
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44 // Analysis disable once EmptyGeneralCatchClause
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45 } catch {
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46 }
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47 }
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48 return this;
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49 }
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50
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51 public IPromise<T> Cast<T>() {
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52 return (IPromise<T>)this;
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53 }
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54
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55 public void Join() {
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56 throw new TargetInvocationException(Error);
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57 }
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58
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59 public void Join(int timeout) {
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60 throw new TargetInvocationException(Error);
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61 }
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62
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63 public virtual Type PromiseType {
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64 get {
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65 return typeof(void);
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66 }
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67 }
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68
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69 public bool IsResolved {
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70 get {
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71 return true;
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72 }
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73 }
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74
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75 public bool IsCancelled {
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76 get {
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77 return false;
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78 }
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79 }
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80
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81 public Exception Error {
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82 get {
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83 return m_error;
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84 }
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85 }
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86
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87 #endregion
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88
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89 #region ICancellable implementation
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90
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91 public void Cancel() {
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92 }
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93
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94 public void Cancel(Exception reason) {
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95 }
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96
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97 #endregion
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98 }
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99 }
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100