annotate Implab/PromiseExtensions.cs @ 207:558f34b2fb50 v2

added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()' added Safe.Dispose(IEnumerable) added PromiseExtensions.CancellationPoint to add a cancellation point to the chain of promises added IPromise<T> PromiseExtensions.Then<T>(this IPromise<T> that, Action<T> success) overloads added PromiseExtensions.Error() overloads to handle a error or(and) a cancellation
author cin
date Wed, 09 Nov 2016 12:03:22 +0300
parents 8200ab154c8a
children 7d07503621fe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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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 Safe.ArgumentNotNull(that, "that");
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124 return PromiseAll(that.ToList());
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125 }
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126
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127 public static IPromise PromiseAll(this ICollection<IPromise> that) {
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128 Safe.ArgumentNotNull(that, "that");
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129
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130 int count = that.Count;
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131 int errors = 0;
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132 var medium = new Promise();
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133
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134 if (count == 0) {
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135 medium.Resolve();
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136 return medium;
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137 }
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138
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139 medium.On(() => {
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140 foreach (var p2 in that)
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141 p2.Cancel();
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142 }, PromiseEventType.ErrorOrCancel);
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143
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144 foreach (var p in that)
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145 p.On(
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146 () => {
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147 if (Interlocked.Decrement(ref count) == 0)
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148 medium.Resolve();
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149 },
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150 error => {
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151 if (Interlocked.Increment(ref errors) == 1)
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152 medium.Reject(
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153 new Exception("The dependency promise is failed", error)
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154 );
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155 },
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156 reason => {
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157 if (Interlocked.Increment(ref errors) == 1)
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158 medium.Cancel(
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159 new Exception("The dependency promise is cancelled")
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160 );
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161 }
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162 );
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163
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164 return medium;
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165 }
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166
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167 public static IPromise<T[]> PromiseAll<T>(this ICollection<IPromise<T>> that) {
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168 Safe.ArgumentNotNull(that, "that");
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169
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170 int count = that.Count;
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171 int errors = 0;
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172 var medium = new Promise<T[]>();
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173 var results = new T[that.Count];
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174
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175 medium.On(() => {
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176 foreach (var p2 in that)
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177 p2.Cancel();
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178 }, PromiseEventType.ErrorOrCancel);
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179
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180 int i = 0;
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181 foreach (var p in that) {
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182 var idx = i;
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183 p.On(
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184 x => {
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185 results[idx] = x;
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186 if (Interlocked.Decrement(ref count) == 0)
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
187 medium.Resolve(results);
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
188 },
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
189 error => {
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
190 if (Interlocked.Increment(ref errors) == 1)
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
191 medium.Reject(
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
192 new Exception("The dependency promise is failed", error)
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 },
138
f75cfa58e3d4 added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents: 136
diff changeset
195 reason => {
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
196 if (Interlocked.Increment(ref errors) == 1)
138
f75cfa58e3d4 added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents: 136
diff changeset
197 medium.Cancel(
f75cfa58e3d4 added ICancellable.Cancel(Exception) to allow specify the reason of cancellation
cin
parents: 136
diff changeset
198 new Exception("The dependency promise is cancelled", reason)
124
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
199 );
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
200 }
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 i++;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
203 }
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
204
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
205 return medium;
a336cb13c6a9 major update, added Drain mathod to AsyncQueue class
cin
parents: 119
diff changeset
206 }
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
207
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
208 public static IPromise Then(this IPromise that, Action success, Action<Exception> error, Action<Exception> cancel) {
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cin
parents: 138
diff changeset
209 Safe.ArgumentNotNull(that, "that");
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
210
149
eb793fbbe4ea fixed promises cancellation
cin
parents: 145
diff changeset
211 var d = new ActionTask(success, error, cancel, false);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
212 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
213 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
214 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
215 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
216
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
217 public static IPromise Then(this IPromise that, Action success, Action<Exception> error) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
218 return Then(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
219 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
220
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
221 public static IPromise Then(this IPromise that, Action success) {
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
222 return Then(that, success, null, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
223 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
224
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
225 public static IPromise<T> Then<T>(this IPromise that, Func<T> success, Func<Exception, T> error, Func<Exception, T> cancel) {
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cin
parents: 138
diff changeset
226 Safe.ArgumentNotNull(that, "that");
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
227
149
eb793fbbe4ea fixed promises cancellation
cin
parents: 145
diff changeset
228 var d = new FuncTask<T>(success, error, cancel, false);
145
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cin
parents: 138
diff changeset
229 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
230 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
231 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
232 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
233
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
234 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
235 return Then(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
236 }
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 public static IPromise<T> Then<T>(this IPromise that, Func<T> success) {
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cin
parents: 138
diff changeset
239 return Then(that, success, null, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
240 }
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 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
243 Safe.ArgumentNotNull(that, "that");
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
244 var d = new FuncTask<T, T2>(success, error, cancel, false);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
245 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
246 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
247 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
248 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
249
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
250 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
251 Safe.ArgumentNotNull(that, "that");
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
252 var d = new FuncTask<T, T>(
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
253 x => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
254 success(x);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
255 return x;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
256 },
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
257 error,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
258 cancel,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
259 false
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
260 );
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
261 that.On(d.Resolve, d.Reject, d.CancelOperation);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
262 d.CancellationRequested(that.Cancel);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
263 return d;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
264 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
265
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
266 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
267 return Then(that, success, error, null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
268 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
269
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
270 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
271 return Then(that, success, null, null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
272 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
273
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
274 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
275 return Then(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
276 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
277
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
278 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
279 return Then(that, success, null, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
280 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
281
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
282 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
283 Func<Exception, T> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
284 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
285 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
286 handler();
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
287 throw new PromiseTransientException(e);
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 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
290 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
291
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
292 return Then(
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
293 that,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
294 x => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
295 handler();
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
296 return x;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
297 },
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
298 errorOrCancel,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
299 errorOrCancel);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
300 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
301
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
302 public static IPromise Always(this IPromise that, Action handler) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
303 Action<Exception> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
304 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
305 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
306 handler();
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
307 throw new PromiseTransientException(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
308 };
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
309 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
310 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
311
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
312 return Then(
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
313 that,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
314 handler,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
315 errorOrCancel,
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
316 errorOrCancel);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
317 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
318
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
319 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
320 Action<Exception> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
321 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
322 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
323 handler(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
324 throw new PromiseTransientException(e);
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 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
327 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
328
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
329 return Then(that, null, errorOrCancel, handleCancellation ? errorOrCancel : null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
330 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
331
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
332 public static IPromise Error(this IPromise that, Action<Exception> handler) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
333 return Error(that, handler, false);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
334 }
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 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
337 Func<Exception, T> errorOrCancel;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
338 if (handler != null)
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
339 errorOrCancel = e => {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
340 handler(e);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
341 throw new PromiseTransientException(e);
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 else
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
344 errorOrCancel = null;
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
345
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
346 return Then(that, null, errorOrCancel, handleCancellation ? errorOrCancel : null);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
347 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
348
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
349 public static IPromise<T> Error<T>(this IPromise<T> that, Action<Exception> handler) {
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
350 return Error(that, handler, false);
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
351 }
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
352
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
353 #region chain traits
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
354 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception, IPromise> error, Func<Exception, IPromise> cancel) {
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
355 Safe.ArgumentNotNull(that, "that");
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
356
149
eb793fbbe4ea fixed promises cancellation
cin
parents: 145
diff changeset
357 var d = new ActionChainTask(success, error, cancel, false);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
358 that.On(d.Resolve, d.Reject, d.CancelOperation);
185
822aab37b107 runnable component, work in progress
cin
parents: 151
diff changeset
359 d.CancellationRequested(that.Cancel);
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
360 return d;
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
361 }
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
362
207
558f34b2fb50 added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'
cin
parents: 205
diff changeset
363 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception, IPromise> error) {
145
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
diff changeset
364 return Chain(that, success, error, null);
706fccb85524 RC: cancellation support for promises + tests
cin
parents: 138
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365 }
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366
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367 public static IPromise Chain(this IPromise that, Func<IPromise> success) {
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368 return Chain(that, success, null, null);
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369 }
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370
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371 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success, Func<Exception, IPromise<T>> error, Func<Exception, IPromise<T>> cancel) {
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372 Safe.ArgumentNotNull(that, "that");
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373
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374 var d = new FuncChainTask<T>(success, error, cancel, false);
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375 that.On(d.Resolve, d.Reject, d.CancelOperation);
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376 if (success != null)
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377 d.CancellationRequested(that.Cancel);
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378 return d;
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379 }
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380
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381 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success, Func<Exception, IPromise<T>> error) {
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382 return Chain(that, success, error, null);
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383 }
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384
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385 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success) {
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386 return Chain(that, success, null, null);
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387 }
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388
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389 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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390 Safe.ArgumentNotNull(that, "that");
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391 var d = new FuncChainTask<T, T2>(success, error, cancel, false);
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392 that.On(d.Resolve, d.Reject, d.CancelOperation);
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393 if (success != null)
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394 d.CancellationRequested(that.Cancel);
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395 return d;
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396 }
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397
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398 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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399 return Chain(that, success, error, null);
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400 }
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401
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402 public static IPromise<T2> Chain<T, T2>(this IPromise<T> that, Func<T, IPromise<T2>> success) {
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403 return Chain(that, success, null, null);
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404 }
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405
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406 #endregion
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407
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408
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409 #if NET_4_5
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410
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411 public static PromiseAwaiter<T> GetAwaiter<T>(this IPromise<T> that) {
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412 Safe.ArgumentNotNull(that, "that");
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413
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414 return new PromiseAwaiter<T>(that);
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415 }
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416
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417 #endif
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418 }
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419 }
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420