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annotate Implab/PromiseExtensions.cs @ 244:eee3e49dd1ff v3

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working on promises
author cin
date Thu, 25 Jan 2018 19:09:16 +0300
parents a867536c68fc
children 5cb4826c2c2a
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1 using System.Threading;
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2 using System;
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3 using Implab.Diagnostics;
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4 using System.Collections.Generic;
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5 using System.Linq;
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6
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7 namespace Implab {
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8 public static class PromiseExtensions {
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9 public static IPromise<T> DispatchToCurrentContext<T>(this IPromise<T> that) {
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10 Safe.ArgumentNotNull(that, "that");
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11 var context = SynchronizationContext.Current;
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12 if (context == null)
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13 return that;
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14
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15 var p = new SyncContextPromise<T>(context);
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16 p.CancellationRequested(that.Cancel);
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17
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18 that.On(
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19 p.Resolve,
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20 p.Reject,
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21 p.CancelOperation
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22 );
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23 return p;
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24 }
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25
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26 public static IPromise<T> DispatchToContext<T>(this IPromise<T> that, SynchronizationContext context) {
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27 Safe.ArgumentNotNull(that, "that");
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28 Safe.ArgumentNotNull(context, "context");
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29
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30 var p = new SyncContextPromise<T>(context);
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31 p.CancellationRequested(that.Cancel);
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32
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33 that.On(
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34 p.Resolve,
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35 p.Reject,
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36 p.CancelOperation
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37 );
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38 return p;
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39 }
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40
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41 /// <summary>
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42 /// Ensures the dispatched.
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43 /// </summary>
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44 /// <returns>The dispatched.</returns>
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45 /// <param name="that">That.</param>
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46 /// <param name="head">Head.</param>
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47 /// <param name="cleanup">Cleanup.</param>
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48 /// <typeparam name="TPromise">The 1st type parameter.</typeparam>
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49 /// <typeparam name="T">The 2nd type parameter.</typeparam>
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50 public static TPromise EnsureDispatched<TPromise, T>(this TPromise that, IPromise<T> head, Action<T> cleanup) where TPromise : IPromise {
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51 Safe.ArgumentNotNull(that, "that");
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52 Safe.ArgumentNotNull(head, "head");
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53
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54 that.On(() => head.On(cleanup), PromiseEventType.Cancelled);
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55
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56 return that;
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57 }
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58
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59 /// <summary>
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60 /// Adds a cancellation point to the chain of promises. When a cancellation request reaches the cancellation point the operation is
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61 /// cancelled immediatelly, and the request is passed towards. If the operation at the higher level can not be cancelled is't result
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62 /// will be collected with <paramref name="cleanup"/> callback.
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63 /// </summary>
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64 /// <typeparam name="T">The type of the promise result.</typeparam>
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65 /// <param name="that">The promise to which the cancellation point should be attached.</param>
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66 /// <param name="cleanup">The callback which is used to cleanup the result of the operation if the cancellation point is cancelled already.</param>
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67 /// <returns>The promise</returns>
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68 public static IPromise<T> CancellationPoint<T>(this IPromise<T> that, Action<T> cleanup) {
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69 var meduim = new Promise<T>();
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70
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71 that.On(meduim.Resolve, meduim.Reject, meduim.CancelOperation);
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73 meduim.CancellationRequested(that.Cancel);
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74 meduim.CancellationRequested(meduim.CancelOperation);
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75
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76 if (cleanup != null)
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77 meduim.On((Action<T>)null, null, (e) => {
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78 that.On(cleanup);
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79 });
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80
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81 return meduim;
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82 }
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83
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84 public static AsyncCallback AsyncCallback<T>(this Promise<T> that, Func<IAsyncResult, T> callback) {
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85 Safe.ArgumentNotNull(that, "that");
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86 Safe.ArgumentNotNull(callback, "callback");
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87 var op = TraceContext.Instance.CurrentOperation;
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88 return ar => {
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89 TraceContext.Instance.EnterLogicalOperation(op, false);
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90 try {
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91 that.Resolve(callback(ar));
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92 } catch (Exception err) {
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93 that.Reject(err);
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94 } finally {
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95 TraceContext.Instance.Leave();
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96 }
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97 };
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98 }
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99
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100 static void CancelByTimeoutCallback(object cookie) {
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101 ((ICancellable)cookie).Cancel(new TimeoutException());
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102 }
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103
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104 /// <summary>
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105 /// Cancells promise after the specified timeout is elapsed.
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106 /// </summary>
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107 /// <param name="that">The promise to cancel on timeout.</param>
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108 /// <param name="milliseconds">The timeout in milliseconds.</param>
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109 /// <typeparam name="TPromise">The 1st type parameter.</typeparam>
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110 public static TPromise Timeout<TPromise>(this TPromise that, int milliseconds) where TPromise : IPromise {
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111 Safe.ArgumentNotNull(that, "that");
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112 var timer = new Timer(CancelByTimeoutCallback, that, milliseconds, -1);
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113 that.On(timer.Dispose, PromiseEventType.All);
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114 return that;
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115 }
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116
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117 public static IPromise PromiseAll(this IEnumerable<IPromise> that) {
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118 Safe.ArgumentNotNull(that, "that");
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119 return PromiseAll(that.ToList());
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120 }
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121
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122 public static IPromise<T[]> PromiseAll<T>(this IEnumerable<IPromise<T>> that) {
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123 return PromiseAll(that, null);
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124 }
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125
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126 public static IPromise<T[]> PromiseAll<T>(this IEnumerable<IPromise<T>> that, Action<T> cleanup) {
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127 Safe.ArgumentNotNull(that, "that");
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128 return PromiseAll(that.ToList(), cleanup);
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129 }
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130
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131 public static IPromise PromiseAll(this ICollection<IPromise> that) {
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132 Safe.ArgumentNotNull(that, "that");
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133
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134 int count = that.Count;
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135 int errors = 0;
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136 var medium = new Promise();
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137
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138 if (count == 0) {
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139 medium.Resolve();
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140 return medium;
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141 }
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142
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143 medium.On(() => {
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144 foreach (var p2 in that)
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145 p2.Cancel();
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146 }, PromiseEventType.ErrorOrCancel);
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147
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148 foreach (var p in that)
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149 p.On(
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150 () => {
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151 if (Interlocked.Decrement(ref count) == 0)
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152 medium.Resolve();
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153 },
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154 error => {
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155 if (Interlocked.Increment(ref errors) == 1)
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156 medium.Reject(
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157 new Exception("The dependency promise is failed", error)
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158 );
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159 },
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160 reason => {
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161 if (Interlocked.Increment(ref errors) == 1)
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162 medium.Cancel(
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163 new Exception("The dependency promise is cancelled")
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164 );
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165 }
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166 );
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167
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168 return medium;
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169 }
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170
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171 public static IPromise<T[]> PromiseAll<T>(this ICollection<IPromise<T>> that) {
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172 return PromiseAll(that, null);
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173 }
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174
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175 /// <summary>
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176 /// Creates a new promise which will be satisfied when all promises are satisfied.
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177 /// </summary>
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178 /// <typeparam name="T"></typeparam>
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179 /// <param name="that"></param>
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180 /// <param name="cleanup">A callback used to cleanup already resolved promises in case of an error</param>
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181 /// <returns></returns>
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182 public static IPromise<T[]> PromiseAll<T>(this ICollection<IPromise<T>> that, Action<T> cleanup) {
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cin
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diff changeset
183 Safe.ArgumentNotNull(that, "that");
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
184
208
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
185 int count = that.Count;
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
186
208
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
187 if (count == 0)
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
188 return Promise<T[]>.FromResult(new T[0]);
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
189
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
190 int errors = 0;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
191 var medium = new Promise<T[]>();
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
192 var results = new T[that.Count];
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
193
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
194 medium.On(() => {
208
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
195 foreach (var p2 in that) {
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
196 p2.Cancel();
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
197 if (cleanup != null)
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
198 p2.On(cleanup);
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
199 }
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
200 }, PromiseEventType.ErrorOrCancel);
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
201
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
202 int i = 0;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
203 foreach (var p in that) {
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
204 var idx = i;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
205 p.On(
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
206 x => {
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
207 results[idx] = x;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
208 if (Interlocked.Decrement(ref count) == 0)
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
209 medium.Resolve(results);
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
210 },
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
211 error => {
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
212 if (Interlocked.Increment(ref errors) == 1)
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
213 medium.Reject(
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
214 new Exception("The dependency promise is failed", error)
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
215 );
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
216 },
138
f75cfa58e3d4 added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents: 136
diff changeset
217 reason => {
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
218 if (Interlocked.Increment(ref errors) == 1)
138
f75cfa58e3d4 added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents: 136
diff changeset
219 medium.Cancel(
f75cfa58e3d4 added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents: 136
diff changeset
220 new Exception("The dependency promise is cancelled", reason)
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
221 );
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
222 }
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
223 );
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
224 i++;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
225 }
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
226
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
227 return medium;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
228 }
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
229
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
230 public static IPromise Then(this IPromise that, Action success, Action<Exception> error, Action<Exception> cancel) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
231 Safe.ArgumentNotNull(that, "that");
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
232
149
eb793fbbe4ea fixed promises cancellation
cin
parents: 145
diff changeset
233 var d = new ActionTask(success, error, cancel, false);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
234 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
235 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
236 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
237 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
238
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
239 public static IPromise Then(this IPromise that, Action success, Action<Exception> error) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
240 return Then(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
241 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
242
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
243 public static IPromise Then(this IPromise that, Action success) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
244 return Then(that, success, null, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
245 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
246
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
247 public static IPromise<T> Then<T>(this IPromise that, Func<T> success, Func<Exception, T> error, Func<Exception, T> cancel) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
248 Safe.ArgumentNotNull(that, "that");
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
249
149
eb793fbbe4ea fixed promises cancellation
cin
parents: 145
diff changeset
250 var d = new FuncTask<T>(success, error, cancel, false);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
251 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
252 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
253 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
254 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
255
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
256 public static IPromise<T> Then<T>(this IPromise that, Func<T> success, Func<Exception, T> error) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
257 return Then(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
258 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
259
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
260 public static IPromise<T> Then<T>(this IPromise that, Func<T> success) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
261 return Then(that, success, null, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
262 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
263
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
264 public static IPromise<T2> Then<T, T2>(this IPromise<T> that, Func<T, T2> success, Func<Exception, T2> error, Func<Exception, T2> cancel) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
265 Safe.ArgumentNotNull(that, "that");
209
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
266 Safe.ArgumentNotNull(success, "success");
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
267
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
268 var d = new FuncTask<T, T2>(success, error, cancel, false);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
269 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
270 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
271 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
272 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
273
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
274 public static IPromise<T> Then<T>(this IPromise<T> that, Action<T> success, Func<Exception, T> error, Func<Exception, T> cancel) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
275 Safe.ArgumentNotNull(that, "that");
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
276 var d = new FuncTask<T, T>(
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
277 x => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
278 success(x);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
279 return x;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
280 },
209
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
281 error,
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
282 cancel,
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
283 false
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
284 );
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
285 that.On(d.Resolve, d.Reject, d.CancelOperation);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
286 d.CancellationRequested(that.Cancel);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
287 return d;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
288 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
289
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
290 public static IPromise<T> Then<T>(this IPromise<T> that, Action<T> success, Func<Exception, T> error) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
291 return Then(that, success, error, null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
292 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
293
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
294 public static IPromise<T> Then<T>(this IPromise<T> that, Action<T> success) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
295 return Then(that, success, null, null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
296 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
297
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
298 public static IPromise<T2> Then<T, T2>(this IPromise<T> that, Func<T, T2> success, Func<Exception, T2> error) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
299 return Then(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
300 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
301
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
302 public static IPromise<T2> Then<T, T2>(this IPromise<T> that, Func<T, T2> success) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
303 return Then(that, success, null, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
304 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
305
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
306 public static IPromise<T> Always<T>(this IPromise<T> that, Action handler) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
307 Func<Exception, T> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
308 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
309 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
310 handler();
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
311 throw new PromiseTransientException(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
312 };
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
313 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
314 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
315
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
316 return Then(
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
317 that,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
318 x => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
319 handler();
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
320 return x;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
321 },
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
322 errorOrCancel,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
323 errorOrCancel);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
324 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
325
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
326 public static IPromise Always(this IPromise that, Action handler) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
327 Action<Exception> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
328 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
329 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
330 handler();
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
331 throw new PromiseTransientException(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
332 };
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
333 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
334 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
335
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
336 return Then(
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
337 that,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
338 handler,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
339 errorOrCancel,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
340 errorOrCancel);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
341 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
342
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
343 public static IPromise Error(this IPromise that, Action<Exception> handler, bool handleCancellation) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
344 Action<Exception> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
345 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
346 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
347 handler(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
348 throw new PromiseTransientException(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
349 };
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
350 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
351 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
352
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
353 return Then(that, null, errorOrCancel, handleCancellation ? errorOrCancel : null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
354 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
355
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
356 public static IPromise Error(this IPromise that, Action<Exception> handler) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
357 return Error(that, handler, false);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
358 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
359
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
360 public static IPromise<T> Error<T>(this IPromise<T> that, Action<Exception> handler, bool handleCancellation) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
361 Func<Exception, T> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
362 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
363 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
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364 handler(e);
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cin
parents: 205
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365 throw new PromiseTransientException(e);
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cin
parents: 205
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366 };
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
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367 else
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cin
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368 errorOrCancel = null;
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369
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cin
parents: 205
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370 return Then(that, null, errorOrCancel, handleCancellation ? errorOrCancel : null);
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cin
parents: 205
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371 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
372
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
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373 public static IPromise<T> Error<T>(this IPromise<T> that, Action<Exception> handler) {
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374 return Error(that, handler, false);
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cin
parents: 205
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375 }
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parents: 205
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376
145
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parents: 138
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377 #region chain traits
207
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parents: 205
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378 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception, IPromise> error, Func<Exception, IPromise> cancel) {
145
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parents: 138
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379 Safe.ArgumentNotNull(that, "that");
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380
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381 var d = new ActionChainTask(success, error, cancel, false);
145
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parents: 138
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382 that.On(d.Resolve, d.Reject, d.CancelOperation);
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822aab37b107 runnable component, work in progress
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383 d.CancellationRequested(that.Cancel);
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384 return d;
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385 }
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parents: 138
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386
207
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parents: 205
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387 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception, IPromise> error) {
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388 return Chain(that, success, error, null);
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parents: 138
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389 }
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390
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391 public static IPromise Chain(this IPromise that, Func<IPromise> success) {
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392 return Chain(that, success, null, null);
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393 }
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parents: 138
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394
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395 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success, Func<Exception, IPromise<T>> error, Func<Exception, IPromise<T>> cancel) {
706fccb85524 RC: cancellation support for promises + tests
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parents: 138
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396 Safe.ArgumentNotNull(that, "that");
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parents: 138
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397
149
eb793fbbe4ea fixed promises cancellation
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parents: 145
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398 var d = new FuncChainTask<T>(success, error, cancel, false);
145
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399 that.On(d.Resolve, d.Reject, d.CancelOperation);
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parents: 138
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400 if (success != null)
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401 d.CancellationRequested(that.Cancel);
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402 return d;
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403 }
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parents: 138
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404
706fccb85524 RC: cancellation support for promises + tests
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diff changeset
405 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success, Func<Exception, IPromise<T>> error) {
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406 return Chain(that, success, error, null);
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407 }
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parents: 138
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408
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diff changeset
409 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success) {
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410 return Chain(that, success, null, null);
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411 }
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parents: 138
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412
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413 public static IPromise<T2> Chain<T, T2>(this IPromise<T> that, Func<T, IPromise<T2>> success, Func<Exception, IPromise<T2>> error, Func<Exception, IPromise<T2>> cancel) {
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parents: 138
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414 Safe.ArgumentNotNull(that, "that");
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
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415 var d = new FuncChainTask<T, T2>(success, error, cancel, false);
145
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416 that.On(d.Resolve, d.Reject, d.CancelOperation);
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cin
parents: 138
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417 if (success != null)
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418 d.CancellationRequested(that.Cancel);
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419 return d;
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parents: 138
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420 }
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parents: 138
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421
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diff changeset
422 public static IPromise<T2> Chain<T, T2>(this IPromise<T> that, Func<T, IPromise<T2>> success, Func<Exception, IPromise<T2>> error) {
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423 return Chain(that, success, error, null);
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parents: 138
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424 }
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425
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diff changeset
426 public static IPromise<T2> Chain<T, T2>(this IPromise<T> that, Func<T, IPromise<T2>> success) {
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427 return Chain(that, success, null, null);
207
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428 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
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429
145
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430 #endregion
207
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parents: 205
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431
209
a867536c68fc Bound promise to CancellationToken
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432 public static IPromise<T2> Guard<T, T2>(this IPromise<T> that, Func<IPromise<T>, IPromise<T2>> continuation, Action<T> cleanup) {
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cin
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433 Safe.ArgumentNotNull(that, "that");
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cin
parents: 208
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434 Safe.ArgumentNotNull(continuation, "continuation");
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435 return continuation(that).Error((err) => {
a867536c68fc Bound promise to CancellationToken
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parents: 208
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436 that.On(cleanup);
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parents: 208
diff changeset
437 }, true);
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438 }
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
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439
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
440 #if NET_4_5
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parents: 205
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441
151
ec91a6dfa5b3 Added support for 'await' operator to promises
cin
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diff changeset
442 public static PromiseAwaiter<T> GetAwaiter<T>(this IPromise<T> that) {
75
4439140706d0 major refactoring, added tasks support
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parents: 72
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443 Safe.ArgumentNotNull(that, "that");
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parents: 72
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444
151
ec91a6dfa5b3 Added support for 'await' operator to promises
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445 return new PromiseAwaiter<T>(that);
207
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446 }
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parents: 205
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447
208
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
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448 public static PromiseAwaiter GetAwaiter(this IPromise that) {
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
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449 Safe.ArgumentNotNull(that, "that");
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
diff changeset
450
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
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451 return new PromiseAwaiter(that);
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
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452 }
7d07503621fe RunnableComponent.Dispose(bool,Exception) changed to standart Dispose(bool)
cin
parents: 207
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453
209
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
454 public static IPromise BoundCancellationToken(this IPromise that, CancellationToken ct) {
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
455 Safe.ArgumentNotNull(that, "that");
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cin
parents: 208
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456 ct.Register(that.Cancel);
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parents: 208
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457 return that.Then(null, null, (err) => {
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cin
parents: 208
diff changeset
458 ct.ThrowIfCancellationRequested();
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cin
parents: 208
diff changeset
459 throw new PromiseTransientException(err);
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cin
parents: 208
diff changeset
460 });
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
461 }
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
462
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
463 public static IPromise<T> BoundCancellationToken<T>(this IPromise<T> that, CancellationToken ct) {
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
464 Safe.ArgumentNotNull(that, "that");
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
465 ct.Register(that.Cancel);
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
466 return that.Then(null, null, (err) => {
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
467 ct.ThrowIfCancellationRequested();
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
468 throw new PromiseTransientException(err);
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
469 });
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
470 }
a867536c68fc Bound promise to CancellationToken
cin
parents: 208
diff changeset
471
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
472 #endif
72
d67b95eddaf4 promises refactoring
cin
parents:
diff changeset
473 }
d67b95eddaf4 promises refactoring
cin
parents:
diff changeset
474 }
d67b95eddaf4 promises refactoring
cin
parents:
diff changeset
475