##// END OF EJS Templates
implab » ImplabNet
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added Safe.DispatchEvent() a legacy equivalent for '?.Invoke()'...
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1 1 using System;
2 2
3 3 namespace Implab.Components
4 4 {
5 public class StateChangeEventArgs {
5 public class StateChangeEventArgs : EventArgs {
6 6 /// <summary>
7 7 /// The error information if any
8 8 /// </summary>
9 9 public Exception LastError { get; set; }
10 10
11 11 /// <summary>
12 12 /// The state of the service corresponding to this event
13 13 /// </summary>
14 14 public ExecutionState State { get; set; }
15 15 }
16 16 }
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@@ -1,300 +1,420
1 1 using System.Threading;
2 2 using System;
3 3 using Implab.Diagnostics;
4 4 using System.Collections.Generic;
5 5 using System.Linq;
6 6
7 7 namespace Implab {
8 8 public static class PromiseExtensions {
9 9 public static IPromise<T> DispatchToCurrentContext<T>(this IPromise<T> that) {
10 10 Safe.ArgumentNotNull(that, "that");
11 11 var context = SynchronizationContext.Current;
12 12 if (context == null)
13 13 return that;
14 14
15 15 var p = new SyncContextPromise<T>(context);
16 16 p.CancellationRequested(that.Cancel);
17 17
18 18 that.On(
19 19 p.Resolve,
20 20 p.Reject,
21 21 p.CancelOperation
22 22 );
23 23 return p;
24 24 }
25 25
26 26 public static IPromise<T> DispatchToContext<T>(this IPromise<T> that, SynchronizationContext context) {
27 27 Safe.ArgumentNotNull(that, "that");
28 28 Safe.ArgumentNotNull(context, "context");
29 29
30 30 var p = new SyncContextPromise<T>(context);
31 31 p.CancellationRequested(that.Cancel);
32 32
33 33 that.On(
34 34 p.Resolve,
35 35 p.Reject,
36 36 p.CancelOperation
37 37 );
38 38 return p;
39 39 }
40 40
41 41 /// <summary>
42 42 /// Ensures the dispatched.
43 43 /// </summary>
44 44 /// <returns>The dispatched.</returns>
45 45 /// <param name="that">That.</param>
46 46 /// <param name="head">Head.</param>
47 47 /// <param name="cleanup">Cleanup.</param>
48 48 /// <typeparam name="TPromise">The 1st type parameter.</typeparam>
49 49 /// <typeparam name="T">The 2nd type parameter.</typeparam>
50 public static TPromise EnsureDispatched<TPromise,T>(this TPromise that, IPromise<T> head, Action<T> cleanup) where TPromise : IPromise{
50 public static TPromise EnsureDispatched<TPromise, T>(this TPromise that, IPromise<T> head, Action<T> cleanup) where TPromise : IPromise {
51 51 Safe.ArgumentNotNull(that, "that");
52 52 Safe.ArgumentNotNull(head, "head");
53 53
54 54 that.On(() => head.On(cleanup), PromiseEventType.Cancelled);
55 55
56 56 return that;
57 57 }
58 58
59 public static AsyncCallback AsyncCallback<T>(this Promise<T> that, Func<IAsyncResult,T> callback) {
59 /// <summary>
60 /// Adds a cancellation point to the chain of promises. When a cancellation request reaches the cancellation point the operation is
61 /// cancelled immediatelly, and the request is passed towards. If the operation at the higher level can not be cancelled is't result
62 /// will be collected with <paramref name="cleanup"/> callback.
63 /// </summary>
64 /// <typeparam name="T">The type of the promise result.</typeparam>
65 /// <param name="that">The promise to which the cancellation point should be attached.</param>
66 /// <param name="cleanup">The callback which is used to cleanup the result of the operation if the cancellation point is cancelled already.</param>
67 /// <returns>The promise</returns>
68 public static IPromise<T> CancellationPoint<T>(this IPromise<T> that, Action<T> cleanup) {
69 var meduim = new Promise<T>();
70
71 that.On(meduim.Resolve, meduim.Reject, meduim.CancelOperation);
72
73 meduim.CancellationRequested(that.Cancel);
74 meduim.CancellationRequested(meduim.CancelOperation);
75
76 if (cleanup != null)
77 meduim.On((Action<T>)null, null, (e) => {
78 that.On(cleanup);
79 });
80
81 return meduim;
82 }
83
84 public static AsyncCallback AsyncCallback<T>(this Promise<T> that, Func<IAsyncResult, T> callback) {
60 85 Safe.ArgumentNotNull(that, "that");
61 86 Safe.ArgumentNotNull(callback, "callback");
62 87 var op = TraceContext.Instance.CurrentOperation;
63 88 return ar => {
64 TraceContext.Instance.EnterLogicalOperation(op,false);
89 TraceContext.Instance.EnterLogicalOperation(op, false);
65 90 try {
66 91 that.Resolve(callback(ar));
67 92 } catch (Exception err) {
68 93 that.Reject(err);
69 94 } finally {
70 95 TraceContext.Instance.Leave();
71 96 }
72 97 };
73 98 }
74 99
75 100 static void CancelByTimeoutCallback(object cookie) {
76 101 ((ICancellable)cookie).Cancel(new TimeoutException());
77 }
78
79 /// <summary>
102 }
103
104 /// <summary>
80 105 /// Cancells promise after the specified timeout is elapsed.
81 106 /// </summary>
82 107 /// <param name="that">The promise to cancel on timeout.</param>
83 108 /// <param name="milliseconds">The timeout in milliseconds.</param>
84 109 /// <typeparam name="TPromise">The 1st type parameter.</typeparam>
85 110 public static TPromise Timeout<TPromise>(this TPromise that, int milliseconds) where TPromise : IPromise {
86 111 Safe.ArgumentNotNull(that, "that");
87 112 var timer = new Timer(CancelByTimeoutCallback, that, milliseconds, -1);
88 113 that.On(timer.Dispose, PromiseEventType.All);
89 114 return that;
90 115 }
91 116
92 117 public static IPromise PromiseAll(this IEnumerable<IPromise> that) {
93 118 Safe.ArgumentNotNull(that, "that");
94 119 return PromiseAll(that.ToList());
95 120 }
96 121
97 122 public static IPromise<T[]> PromiseAll<T>(this IEnumerable<IPromise<T>> that) {
98 123 Safe.ArgumentNotNull(that, "that");
99 124 return PromiseAll(that.ToList());
100 125 }
101 126
102 127 public static IPromise PromiseAll(this ICollection<IPromise> that) {
103 128 Safe.ArgumentNotNull(that, "that");
104 129
105 130 int count = that.Count;
106 131 int errors = 0;
107 132 var medium = new Promise();
108 133
109 134 if (count == 0) {
110 135 medium.Resolve();
111 136 return medium;
112 137 }
113 138
114 139 medium.On(() => {
115 foreach(var p2 in that)
140 foreach (var p2 in that)
116 141 p2.Cancel();
117 142 }, PromiseEventType.ErrorOrCancel);
118 143
119 144 foreach (var p in that)
120 145 p.On(
121 146 () => {
122 147 if (Interlocked.Decrement(ref count) == 0)
123 148 medium.Resolve();
124 149 },
125 150 error => {
126 151 if (Interlocked.Increment(ref errors) == 1)
127 152 medium.Reject(
128 153 new Exception("The dependency promise is failed", error)
129 154 );
130 155 },
131 156 reason => {
132 157 if (Interlocked.Increment(ref errors) == 1)
133 158 medium.Cancel(
134 159 new Exception("The dependency promise is cancelled")
135 160 );
136 161 }
137 162 );
138 163
139 164 return medium;
140 165 }
141 166
142 167 public static IPromise<T[]> PromiseAll<T>(this ICollection<IPromise<T>> that) {
143 168 Safe.ArgumentNotNull(that, "that");
144 169
145 170 int count = that.Count;
146 171 int errors = 0;
147 172 var medium = new Promise<T[]>();
148 173 var results = new T[that.Count];
149 174
150 175 medium.On(() => {
151 foreach(var p2 in that)
176 foreach (var p2 in that)
152 177 p2.Cancel();
153 178 }, PromiseEventType.ErrorOrCancel);
154 179
155 180 int i = 0;
156 181 foreach (var p in that) {
157 182 var idx = i;
158 183 p.On(
159 184 x => {
160 185 results[idx] = x;
161 186 if (Interlocked.Decrement(ref count) == 0)
162 187 medium.Resolve(results);
163 188 },
164 189 error => {
165 190 if (Interlocked.Increment(ref errors) == 1)
166 191 medium.Reject(
167 192 new Exception("The dependency promise is failed", error)
168 193 );
169 194 },
170 195 reason => {
171 196 if (Interlocked.Increment(ref errors) == 1)
172 197 medium.Cancel(
173 198 new Exception("The dependency promise is cancelled", reason)
174 199 );
175 200 }
176 201 );
177 202 i++;
178 203 }
179 204
180 205 return medium;
181 206 }
182 207
183 208 public static IPromise Then(this IPromise that, Action success, Action<Exception> error, Action<Exception> cancel) {
184 209 Safe.ArgumentNotNull(that, "that");
185 210
186 211 var d = new ActionTask(success, error, cancel, false);
187 212 that.On(d.Resolve, d.Reject, d.CancelOperation);
188 213 d.CancellationRequested(that.Cancel);
189 214 return d;
190 215 }
191 216
192 217 public static IPromise Then(this IPromise that, Action success, Action<Exception> error) {
193 218 return Then(that, success, error, null);
194 219 }
195 220
196 221 public static IPromise Then(this IPromise that, Action success) {
197 222 return Then(that, success, null, null);
198 223 }
199 224
200 225 public static IPromise<T> Then<T>(this IPromise that, Func<T> success, Func<Exception, T> error, Func<Exception, T> cancel) {
201 226 Safe.ArgumentNotNull(that, "that");
202 227
203 228 var d = new FuncTask<T>(success, error, cancel, false);
204 229 that.On(d.Resolve, d.Reject, d.CancelOperation);
205 230 d.CancellationRequested(that.Cancel);
206 231 return d;
207 232 }
208 233
209 234 public static IPromise<T> Then<T>(this IPromise that, Func<T> success, Func<Exception, T> error) {
210 235 return Then(that, success, error, null);
211 236 }
212 237
213 238 public static IPromise<T> Then<T>(this IPromise that, Func<T> success) {
214 239 return Then(that, success, null, null);
215 240 }
216 241
217 242 public static IPromise<T2> Then<T, T2>(this IPromise<T> that, Func<T, T2> success, Func<Exception, T2> error, Func<Exception, T2> cancel) {
218 243 Safe.ArgumentNotNull(that, "that");
219 var d = new FuncTask<T,T2>(success, error, cancel, false);
244 var d = new FuncTask<T, T2>(success, error, cancel, false);
220 245 that.On(d.Resolve, d.Reject, d.CancelOperation);
221 246 d.CancellationRequested(that.Cancel);
222 247 return d;
223 248 }
224 249
250 public static IPromise<T> Then<T>(this IPromise<T> that, Action<T> success, Func<Exception, T> error, Func<Exception, T> cancel) {
251 Safe.ArgumentNotNull(that, "that");
252 var d = new FuncTask<T, T>(
253 x => {
254 success(x);
255 return x;
256 },
257 error,
258 cancel,
259 false
260 );
261 that.On(d.Resolve, d.Reject, d.CancelOperation);
262 d.CancellationRequested(that.Cancel);
263 return d;
264 }
265
266 public static IPromise<T> Then<T>(this IPromise<T> that, Action<T> success, Func<Exception, T> error) {
267 return Then(that, success, error, null);
268 }
269
270 public static IPromise<T> Then<T>(this IPromise<T> that, Action<T> success) {
271 return Then(that, success, null, null);
272 }
273
225 274 public static IPromise<T2> Then<T, T2>(this IPromise<T> that, Func<T, T2> success, Func<Exception, T2> error) {
226 275 return Then(that, success, error, null);
227 276 }
228 277
229 278 public static IPromise<T2> Then<T, T2>(this IPromise<T> that, Func<T, T2> success) {
230 279 return Then(that, success, null, null);
231 280 }
232 281
282 public static IPromise<T> Always<T>(this IPromise<T> that, Action handler) {
283 Func<Exception, T> errorOrCancel;
284 if (handler != null)
285 errorOrCancel = e => {
286 handler();
287 throw new PromiseTransientException(e);
288 };
289 else
290 errorOrCancel = null;
291
292 return Then(
293 that,
294 x => {
295 handler();
296 return x;
297 },
298 errorOrCancel,
299 errorOrCancel);
300 }
301
302 public static IPromise Always(this IPromise that, Action handler) {
303 Action<Exception> errorOrCancel;
304 if (handler != null)
305 errorOrCancel = e => {
306 handler();
307 throw new PromiseTransientException(e);
308 };
309 else
310 errorOrCancel = null;
311
312 return Then(
313 that,
314 handler,
315 errorOrCancel,
316 errorOrCancel);
317 }
318
319 public static IPromise Error(this IPromise that, Action<Exception> handler, bool handleCancellation) {
320 Action<Exception> errorOrCancel;
321 if (handler != null)
322 errorOrCancel = e => {
323 handler(e);
324 throw new PromiseTransientException(e);
325 };
326 else
327 errorOrCancel = null;
328
329 return Then(that, null, errorOrCancel, handleCancellation ? errorOrCancel : null);
330 }
331
332 public static IPromise Error(this IPromise that, Action<Exception> handler) {
333 return Error(that, handler, false);
334 }
335
336 public static IPromise<T> Error<T>(this IPromise<T> that, Action<Exception> handler, bool handleCancellation) {
337 Func<Exception, T> errorOrCancel;
338 if (handler != null)
339 errorOrCancel = e => {
340 handler(e);
341 throw new PromiseTransientException(e);
342 };
343 else
344 errorOrCancel = null;
345
346 return Then(that, null, errorOrCancel, handleCancellation ? errorOrCancel : null);
347 }
348
349 public static IPromise<T> Error<T>(this IPromise<T> that, Action<Exception> handler) {
350 return Error(that, handler, false);
351 }
352
233 353 #region chain traits
234 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception,IPromise> error, Func<Exception,IPromise> cancel) {
354 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception, IPromise> error, Func<Exception, IPromise> cancel) {
235 355 Safe.ArgumentNotNull(that, "that");
236 356
237 357 var d = new ActionChainTask(success, error, cancel, false);
238 358 that.On(d.Resolve, d.Reject, d.CancelOperation);
239 359 d.CancellationRequested(that.Cancel);
240 360 return d;
241 361 }
242 362
243 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception,IPromise> error) {
363 public static IPromise Chain(this IPromise that, Func<IPromise> success, Func<Exception, IPromise> error) {
244 364 return Chain(that, success, error, null);
245 365 }
246 366
247 367 public static IPromise Chain(this IPromise that, Func<IPromise> success) {
248 368 return Chain(that, success, null, null);
249 369 }
250 370
251 371 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success, Func<Exception, IPromise<T>> error, Func<Exception, IPromise<T>> cancel) {
252 372 Safe.ArgumentNotNull(that, "that");
253 373
254 374 var d = new FuncChainTask<T>(success, error, cancel, false);
255 375 that.On(d.Resolve, d.Reject, d.CancelOperation);
256 376 if (success != null)
257 377 d.CancellationRequested(that.Cancel);
258 378 return d;
259 379 }
260 380
261 381 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success, Func<Exception, IPromise<T>> error) {
262 382 return Chain(that, success, error, null);
263 383 }
264 384
265 385 public static IPromise<T> Chain<T>(this IPromise that, Func<IPromise<T>> success) {
266 386 return Chain(that, success, null, null);
267 387 }
268 388
269 389 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) {
270 390 Safe.ArgumentNotNull(that, "that");
271 var d = new FuncChainTask<T,T2>(success, error, cancel, false);
391 var d = new FuncChainTask<T, T2>(success, error, cancel, false);
272 392 that.On(d.Resolve, d.Reject, d.CancelOperation);
273 393 if (success != null)
274 394 d.CancellationRequested(that.Cancel);
275 395 return d;
276 396 }
277 397
278 398 public static IPromise<T2> Chain<T, T2>(this IPromise<T> that, Func<T, IPromise<T2>> success, Func<Exception, IPromise<T2>> error) {
279 399 return Chain(that, success, error, null);
280 400 }
281 401
282 402 public static IPromise<T2> Chain<T, T2>(this IPromise<T> that, Func<T, IPromise<T2>> success) {
283 403 return Chain(that, success, null, null);
284 }
285
404 }
405
286 406 #endregion
287
288
289 #if NET_4_5
290
407
408
409 #if NET_4_5
410
291 411 public static PromiseAwaiter<T> GetAwaiter<T>(this IPromise<T> that) {
292 412 Safe.ArgumentNotNull(that, "that");
293 413
294 414 return new PromiseAwaiter<T>(that);
295 }
296
297 #endif
415 }
416
417 #endif
298 418 }
299 419 }
300 420
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@@ -1,114 +1,131
1 1 using System;
2 2 using System.Collections.Generic;
3 3 using System.Linq;
4 4 using System.Text;
5 5 using System.Text.RegularExpressions;
6 6 using System.Diagnostics;
7 using System.Collections;
7 8
8 9 namespace Implab
9 10 {
10 11 public static class Safe
11 12 {
12 13 public static void ArgumentAssert(bool condition, string paramName) {
13 14 if (!condition)
14 15 throw new ArgumentException("The parameter is invalid", paramName);
15 16 }
16 17
17 18 public static void ArgumentMatch(string value, string paramName, Regex rx) {
18 19 if (rx == null)
19 20 throw new ArgumentNullException("rx");
20 21 if (!rx.IsMatch(value))
21 22 throw new ArgumentException(String.Format("The prameter value must match {0}", rx), paramName);
22 23 }
23 24
24 25 public static void ArgumentNotEmpty(string value, string paramName) {
25 26 if (String.IsNullOrEmpty(value))
26 27 throw new ArgumentException("The parameter can't be empty", paramName);
27 28 }
28 29
29 30 public static void ArgumentNotEmpty<T>(T[] value, string paramName) {
30 31 if (value == null || value.Length == 0)
31 32 throw new ArgumentException("The array must be not emty", paramName);
32 33 }
33 34
34 35 public static void ArgumentNotNull(object value, string paramName) {
35 36 if (value == null)
36 37 throw new ArgumentNullException(paramName);
37 38 }
38 39
39 40 public static void ArgumentInRange(int value, int min, int max, string paramName) {
40 41 if (value < min || value > max)
41 42 throw new ArgumentOutOfRangeException(paramName);
42 43 }
43 44
44 45 public static void ArgumentOfType(object value, Type type, string paramName) {
45 46 if (!type.IsInstanceOfType(value))
46 47 throw new ArgumentException(String.Format("The parameter must be of type {0}", type), paramName);
47 48 }
48 49
49 50 public static void Dispose(params IDisposable[] objects) {
50 51 foreach (var d in objects)
51 52 if (d != null)
52 53 d.Dispose();
53 54 }
54 55
55 56 public static void Dispose(params object[] objects) {
56 57 foreach (var obj in objects) {
57 58 var d = obj as IDisposable;
58 59 if (d != null)
59 60 d.Dispose();
60 61 }
61 62 }
62 63
64 public static void Dispose(IEnumerable<IDisposable> objects) {
65 foreach (var d in objects)
66 if (d != null)
67 d.Dispose();
68 }
69
63 70 public static void Dispose(object obj) {
64 71 var d = obj as IDisposable;
65 72 if (d != null)
66 73 d.Dispose();
67 74 }
68 75
76 public static void DispatchEvent<T>(this EventHandler<T> handler, object sender, T args) {
77 if (handler != null)
78 handler(sender, args);
79 }
80
81 public static void DispatchEvent(this EventHandler handler, object sender, EventArgs args) {
82 if (handler != null)
83 handler(sender, args);
84 }
85
69 86 [DebuggerStepThrough]
70 87 public static IPromise<T> Run<T>(Func<T> action) {
71 88 ArgumentNotNull(action, "action");
72 89
73 90 try {
74 91 return Promise<T>.FromResult(action());
75 92 } catch (Exception err) {
76 93 return Promise<T>.FromException(err);
77 94 }
78 95 }
79 96
80 97 [DebuggerStepThrough]
81 98 public static IPromise Run(Action action) {
82 99 ArgumentNotNull(action, "action");
83 100
84 101 try {
85 102 action();
86 103 return Promise.Success;
87 104 } catch (Exception err) {
88 105 return new FailedPromise(err);
89 106 }
90 107 }
91 108
92 109 [DebuggerStepThrough]
93 110 public static IPromise Run(Func<IPromise> action) {
94 111 ArgumentNotNull(action, "action");
95 112
96 113 try {
97 114 return action() ?? new FailedPromise(new Exception("The action returned null"));
98 115 } catch (Exception err) {
99 116 return new FailedPromise(err);
100 117 }
101 118 }
102 119
103 120 [DebuggerStepThrough]
104 121 public static IPromise<T> Run<T>(Func<IPromise<T>> action) {
105 122 ArgumentNotNull(action, "action");
106 123
107 124 try {
108 125 return action() ?? Promise<T>.FromException(new Exception("The action returned null"));
109 126 } catch (Exception err) {
110 127 return Promise<T>.FromException(err);
111 128 }
112 129 }
113 130 }
114 131 }
General Comments 3
Under Review
sergey
author
Comment #7
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Auto status change to "Under Review"

Approved
sergey
author
Comment #8
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ok, latest stable version should be in default

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