Mercurial > pub > ImplabNet

annotate Implab/Promise.cs @ 106:d4e38929ce36 v2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
promises refactoring
author cin
date Mon, 10 Nov 2014 18:00:28 +0300
parents 4d308952fd5e
children f5220e5472ef
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
aa367305156b small fixes
cin
parents: 1
diff changeset
1 using System;
aa367305156b small fixes
cin
parents: 1
diff changeset
2 using System.Collections.Generic;
aa367305156b small fixes
cin
parents: 1
diff changeset
3 using System.Reflection;
aa367305156b small fixes
cin
parents: 1
diff changeset
4 using System.Threading;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
5 using Implab.Parallels;
2
aa367305156b small fixes
cin
parents: 1
diff changeset
6
aa367305156b small fixes
cin
parents: 1
diff changeset
7 namespace Implab {
aa367305156b small fixes
cin
parents: 1
diff changeset
8
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
9 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
10 /// Класс для асинхронного получения результатов. Так называемое "обещание".
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
11 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
12 /// <typeparam name="T">Тип получаемого результата</typeparam>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
13 /// <remarks>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
14 /// <para>Сервис при обращении к его методу дает обещаиние о выполнении операции,
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
15 /// клиент получив такое обещание может установить ряд обратных вызово для получения
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
16 /// событий выполнения обещания, тоесть завершения операции и предоставлении результатов.</para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
17 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
18 /// Обещение может быть как выполнено, так и выполнено с ошибкой. Для подписки на
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
19 /// данные события клиент должен использовать методы <c>Then</c>.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
20 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
21 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
22 /// Сервис, в свою очередь, по окончанию выполнения операции (возможно с ошибкой),
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
23 /// использует методы <c>Resolve</c> либо <c>Reject</c> для оповещения клиетна о
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
24 /// выполнении обещания.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
25 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
26 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
27 /// Если сервер успел выполнить обещание еще до того, как клиент на него подписался,
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
28 /// то в момент подписки клиента будут вызваны соответсвующие события в синхронном
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
29 /// режиме и клиент будет оповещен в любом случае. Иначе, обработчики добавляются в
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
30 /// список в порядке подписания и в этом же порядке они будут вызваны при выполнении
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
31 /// обещания.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
32 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
33 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
34 /// Обрабатывая результаты обещания можно преобразовывать результаты либо инициировать
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
35 /// связанные асинхронные операции, которые также возвращают обещания. Для этого следует
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
36 /// использовать соответствующую форму методе <c>Then</c>.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
37 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
38 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
39 /// Также хорошим правилом является то, что <c>Resolve</c> и <c>Reject</c> должен вызывать
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
40 /// только инициатор обещания иначе могут возникнуть противоречия.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
41 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
42 /// </remarks>
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
43 public class Promise<T> : IPromise<T> {
2
aa367305156b small fixes
cin
parents: 1
diff changeset
44
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
45 protected abstract class AbstractHandler : MTCustomQueueNode<AbstractHandler> {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
46 public abstract void Resolve(T result);
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
47 public abstract void Reject(Exception error);
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
48 public abstract void Cancel();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
49 }
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
50
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
51 protected class HandlerDescriptor<T2> : AbstractHandler {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
52
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
53 readonly Func<T,T2> m_resultHandler;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
54 readonly Func<Exception,T2> m_errorHandler;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
55 readonly Action m_cancellHandler;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
56 readonly Promise<T2> m_medium;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
57
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
58 public HandlerDescriptor(Func<T,T2> resultHandler, Func<Exception,T2> errorHandler, Action cancelHandler, Promise<T2> medium) {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
59 m_resultHandler = resultHandler;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
60 m_errorHandler = errorHandler;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
61 m_cancellHandler = cancelHandler;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
62 m_medium = medium;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
63 }
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
64
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
65 public override void Resolve(T result) {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
66 if (m_resultHandler != null) {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
67 try {
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
68 if (m_medium != null)
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
69 m_medium.Resolve(m_resultHandler(result));
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
70 else
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
71 m_resultHandler(result);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
72 } catch (Exception e) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
73 Reject(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
74 }
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
75 } else if(m_medium != null)
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
76 m_medium.Resolve(default(T2));
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
77 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
78
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
79 public override void Reject(Exception error) {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
80 if (m_errorHandler != null) {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
81 try {
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
82 var res = m_errorHandler(error);
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
83 if (m_medium != null)
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
84 m_medium.Resolve(res);
99
8ddf1648eca4 fixed TransientPromiseException handling
cin
parents: 96
diff changeset
85 /*} catch (TransientPromiseException err2) {
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
86 if (medium != null)
99
8ddf1648eca4 fixed TransientPromiseException handling
cin
parents: 96
diff changeset
87 medium.Reject(err2.InnerException);*/
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
88 } catch (Exception err2) {
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
89 if (m_medium != null)
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
90 m_medium.Reject(err2);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
91 }
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
92 } else if (m_medium != null)
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
93 m_medium.Reject(error);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
94 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
95
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
96 public override void Cancel() {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
97 if (m_cancellHandler != null) {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
98 try {
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
99 m_cancellHandler();
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
100 } catch (Exception err) {
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
101 Reject(err);
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
102 return;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
103 }
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
104 }
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
105 if (m_medium != null)
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
106 m_medium.Cancel();
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
107 }
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
108 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
109
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
110 const int UNRESOLVED_SATE = 0;
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
111 const int TRANSITIONAL_STATE = 1;
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
112 const int SUCCEEDED_STATE = 2;
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
113 const int REJECTED_STATE = 3;
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
114 const int CANCELLED_STATE = 4;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
115
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
116 int m_childrenCount;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
117 int m_state;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
118 T m_result;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
119 Exception m_error;
9
cin
parents: 7
diff changeset
120
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
121 readonly MTCustomQueue<AbstractHandler> m_handlers = new MTCustomQueue<AbstractHandler>();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
122 //readonly MTQueue<AbstractHandler> m_handlers = new MTQueue<AbstractHandler>();
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
123
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
124 public Promise() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
125 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
126
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
127 public Promise(IPromise parent) {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
128 if (parent != null)
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
129 AddHandler<T>(
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
130 null,
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
131 null,
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
132 () => {
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
133 if (parent.IsExclusive)
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
134 parent.Cancel();
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
135 },
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
136 null,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
137 false
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
138 );
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
139 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
140
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
141 bool BeginTransit() {
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
142 return UNRESOLVED_SATE == Interlocked.CompareExchange(ref m_state, TRANSITIONAL_STATE, UNRESOLVED_SATE);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
143 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
144
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
145 void CompleteTransit(int state) {
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
146 if (TRANSITIONAL_STATE != Interlocked.CompareExchange(ref m_state, state, TRANSITIONAL_STATE))
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
147 throw new InvalidOperationException("Can't complete transition when the object isn't in the transitional state");
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
148 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
149
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
150 void WaitTransition() {
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
151 while (m_state == TRANSITIONAL_STATE) {
80
4f20870d0816 added memory barriers
cin
parents: 76
diff changeset
152 Thread.MemoryBarrier();
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
153 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
154 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
155
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
156 public bool IsResolved {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
157 get {
80
4f20870d0816 added memory barriers
cin
parents: 76
diff changeset
158 Thread.MemoryBarrier();
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
159 return m_state > 1;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
160 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
161 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
162
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
163 public bool IsCancelled {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
164 get {
80
4f20870d0816 added memory barriers
cin
parents: 76
diff changeset
165 Thread.MemoryBarrier();
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
166 return m_state == CANCELLED_STATE;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
167 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
168 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
169
29
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
170 public Type PromiseType {
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
171 get { return typeof(T); }
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
172 }
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
173
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
174 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
175 /// Выполняет обещание, сообщая об успешном выполнении.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
176 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
177 /// <param name="result">Результат выполнения.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
178 /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
179 public void Resolve(T result) {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
180 if (BeginTransit()) {
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
181 m_result = result;
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
182 CompleteTransit(SUCCEEDED_STATE);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
183 OnStateChanged();
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
184 } else {
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
185 WaitTransition();
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
186 if (m_state != CANCELLED_STATE)
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
187 throw new InvalidOperationException("The promise is already resolved");
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
188 }
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
189 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
190
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
191 /// <summary>
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
192 /// Выполняет обещание, сообщая об успешном выполнении. Результатом выполнения будет пустое значения.
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
193 /// </summary>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
194 /// <remarks>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
195 /// Данный вариант удобен в случаях, когда интересен факт выполнения операции, нежели полученное значение.
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
196 /// </remarks>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
197 public void Resolve() {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
198 Resolve(default(T));
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
199 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
200
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
201 /// <summary>
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
202 /// Выполняет обещание, сообщая об ошибке
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
203 /// </summary>
16
cin
parents: 15
diff changeset
204 /// <remarks>
cin
parents: 15
diff changeset
205 /// Поскольку обещание должно работать в многопточной среде, при его выполнении сразу несколько потоков
cin
parents: 15
diff changeset
206 /// могу вернуть ошибку, при этом только первая будет использована в качестве результата, остальные
cin
parents: 15
diff changeset
207 /// будут проигнорированы.
cin
parents: 15
diff changeset
208 /// </remarks>
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
209 /// <param name="error">Исключение возникшее при выполнении операции</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
210 /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
211 public void Reject(Exception error) {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
212 if (BeginTransit()) {
99
8ddf1648eca4 fixed TransientPromiseException handling
cin
parents: 96
diff changeset
213 m_error = error is TransientPromiseException ? error.InnerException : error;
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
214 CompleteTransit(REJECTED_STATE);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
215 OnStateChanged();
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
216 } else {
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
217 WaitTransition();
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
218 if (m_state == SUCCEEDED_STATE)
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
219 throw new InvalidOperationException("The promise is already resolved");
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
220 }
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
221 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
222
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
223 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
224 /// Отменяет операцию, если это возможно.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
225 /// </summary>
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
226 /// <remarks>Для определения была ли операция отменена следует использовать свойство <see cref="IsCancelled"/>.</remarks>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
227 public void Cancel() {
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
228 if (BeginTransit()) {
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
229 CompleteTransit(CANCELLED_STATE);
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
230 OnStateChanged();
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
231 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
232 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
233
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
234 /// <summary>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
235 /// Последний обработчик в цепочки обещаний.
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
236 /// </summary>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
237 /// <param name="success"></param>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
238 /// <param name="error"></param>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
239 /// <param name="cancel"></param>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
240 /// <remarks>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
241 /// <para>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
242 /// Данный метод не создает связанного с текущим обещания и предназначен для окончания
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
243 /// фсинхронной цепочки.
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
244 /// </para>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
245 /// <para>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
246 /// Если данный метод вызвать несколько раз, либо добавить другие обработчики, то цепочка
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
247 /// не будет одиночной <see cref="IsExclusive"/> и, как следствие, будет невозможна отмена
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
248 /// всей цепи обещаний снизу (с самого последнего обещания).
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
249 /// </para>
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
250 /// </remarks>
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
251 public void On(Action<T> success, Action<Exception> error, Action cancel) {
75
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
252 if (success == null && error == null && cancel == null)
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
253 return;
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
254
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
255 AddHandler(
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
256 success != null ? new Func<T,T>(x => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
257 success(x);
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
258 return x;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
259 }) : null,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
260 error != null ? new Func<Exception,T>(e => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
261 error(e);
75
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
262 return default(T);
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
263 }) : null,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
264 cancel,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
265 null,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
266 false
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
267 );
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
268 }
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
269
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
270 public void On(Action<T> success, Action<Exception> error) {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
271 On(success, error, null);
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
272 }
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
273
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
274 public void On(Action<T> success) {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
275 On(success, null, null);
75
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
276 }
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
277
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
278 public void On(Action handler, PromiseEventType events) {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
279 Safe.ArgumentNotNull(handler, "handler");
75
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
280
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
281 Func<T,T> success = events.HasFlag(PromiseEventType.Success) ? new Func<T,T>(x => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
282 handler();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
283 return x;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
284 }) : null;
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
285 Func<Exception,T> error = events.HasFlag(PromiseEventType.Error) ? new Func<Exception,T>(e => {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
286 handler();
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
287 return default(T);
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
288 }) : null;
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
289 Action cancel = events.HasFlag(PromiseEventType.Cancelled) ? handler : null;
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
290
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
291 AddHandler(success, error, cancel, null, false);
75
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
292 }
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
293
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
294 public IPromise Error(Action<Exception> error) {
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
295 if (error == null)
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
296 return this;
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
297
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
298 var medium = new Promise<T>(this);
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
299
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
300 AddHandler(
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
301 null,
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
302 e => {
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
303 error(e);
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
304 return default(T);
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
305 },
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
306 null,
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
307 medium,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
308 true
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
309 );
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
310
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
311 return medium;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
312 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
313
11
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
314 /// <summary>
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
315 /// Handles error and allows to keep the promise.
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
316 /// </summary>
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
317 /// <remarks>
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
318 /// If the specified handler throws an exception, this exception will be used to reject the promise.
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
319 /// </remarks>
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
320 /// <param name="handler">The error handler which returns the result of the promise.</param>
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
321 /// <returns>New promise.</returns>
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
322 public IPromise<T> Error(Func<Exception,T> handler) {
11
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
323 if (handler == null)
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
324 return this;
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
325
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
326 var medium = new Promise<T>(this);
11
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
327
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
328 AddHandler(null, handler, null, medium, true);
11
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
329
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
330 return medium;
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
331 }
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
332
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
333 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
334 /// Позволяет преобразовать результат выполения операции к новому типу.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
335 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
336 /// <typeparam name="TNew">Новый тип результата.</typeparam>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
337 /// <param name="mapper">Преобразование результата к новому типу.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
338 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
339 /// исключение возникшее при выполнении операции.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
340 /// <returns>Новое обещание, которое будет выполнено при выполнении исходного обещания.</returns>
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
341 /// <param name = "cancel"></param>
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
342 public IPromise<TNew> Then<TNew>(Func<T, TNew> mapper, Func<Exception,TNew> error, Action cancel) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
343 Safe.ArgumentNotNull(mapper, "mapper");
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
344
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
345 // создаем прицепленное обещание
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
346 var medium = new Promise<TNew>(this);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
347
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
348 AddHandler(
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
349 mapper,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
350 error,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
351 cancel,
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
352 medium,
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
353 true
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
354 );
2
aa367305156b small fixes
cin
parents: 1
diff changeset
355
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
356 return medium;
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
357 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
358
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
359 public IPromise<TNew> Then<TNew>(Func<T, TNew> mapper, Func<Exception,TNew> error) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
360 return Then(mapper, error, null);
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
361 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
362
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
363 public IPromise<TNew> Then<TNew>(Func<T, TNew> mapper) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
364 return Then(mapper, null, null);
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
365 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
366
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
367 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
368 /// Сцепляет несколько аснхронных операций. Указанная асинхронная операция будет вызвана после
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
369 /// выполнения текущей, а результат текущей операции может быть использован для инициализации
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
370 /// новой операции.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
371 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
372 /// <typeparam name="TNew">Тип результата указанной асинхронной операции.</typeparam>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
373 /// <param name="chained">Асинхронная операция, которая должна будет начаться после выполнения текущей.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
374 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
375 /// исключение возникшее при выполнении текуещй операции.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
376 /// <returns>Новое обещание, которое будет выполнено по окончанию указанной аснхронной операции.</returns>
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
377 /// <param name = "cancel"></param>
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
378 public IPromise<TNew> Chain<TNew>(Func<T, IPromise<TNew>> chained, Func<Exception,IPromise<TNew>> error, Action cancel) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
379
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
380 Safe.ArgumentNotNull(chained, "chained");
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
381
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
382 // проблема в том, что на момент связывания еще не начата асинхронная операция, поэтому нужно
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
383 // создать посредника, к которому будут подвызяваться следующие обработчики.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
384 // когда будет выполнена реальная асинхронная операция, она обратиться к посреднику, чтобы
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
385 // передать через него результаты работы.
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
386 var medium = new Promise<TNew>(this);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
387
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
388 Func<T,T> resultHandler = delegate(T result) {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
389 if (medium.IsCancelled)
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
390 return default(T);
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
391
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
392 var promise = chained(result);
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
393
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
394 promise.On(
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
395 medium.Resolve,
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
396 medium.Reject,
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
397 () => medium.Reject(new OperationCanceledException()) // внешняя отмена связанной операции рассматривается как ошибка
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
398 );
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
399
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
400 // notify chained operation that it's not needed anymore
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
401 // порядок вызова Then, Cancelled важен, поскольку от этого
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
402 // зависит IsExclusive
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
403 medium.On(
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
404 null,
279e226dffdd code cleanup
cin
parents: 99
diff changeset
405 null,
279e226dffdd code cleanup
cin
parents: 99
diff changeset
406 () => {
279e226dffdd code cleanup
cin
parents: 99
diff changeset
407 if (promise.IsExclusive)
279e226dffdd code cleanup
cin
parents: 99
diff changeset
408 promise.Cancel();
279e226dffdd code cleanup
cin
parents: 99
diff changeset
409 }
279e226dffdd code cleanup
cin
parents: 99
diff changeset
410 );
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
411
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
412 return default(T);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
413 };
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
414
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
415 Func<Exception,T> errorHandler;
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
416
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
417 if (error != null)
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
418 errorHandler = delegate(Exception e) {
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
419 try {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
420 var promise = error(e);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
421
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
422 promise.On(
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
423 medium.Resolve,
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
424 medium.Reject,
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
425 () => medium.Reject(new OperationCanceledException()) // внешняя отмена связанной операции рассматривается как ошибка
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
426 );
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
427
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
428 // notify chained operation that it's not needed anymore
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
429 // порядок вызова Then, Cancelled важен, поскольку от этого
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
430 // зависит IsExclusive
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
431 medium.Cancelled(() => {
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
432 if (promise.IsExclusive)
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
433 promise.Cancel();
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
434 });
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
435 } catch (Exception e2) {
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
436 medium.Reject(e2);
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
437 }
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
438 return default(T);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
439 };
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
440 else
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
441 errorHandler = err => {
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
442 medium.Reject(err);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
443 return default(T);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
444 };
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
445
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
446
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
447 Action cancelHandler;
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
448 if (cancel != null)
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
449 cancelHandler = () => {
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
450 if (cancel != null)
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
451 cancel();
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
452 medium.Cancel();
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
453 };
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
454 else
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
455 cancelHandler = medium.Cancel;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
456
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
457 AddHandler(
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
458 resultHandler,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
459 errorHandler,
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
460 cancelHandler,
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
461 null,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
462 true
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
463 );
2
aa367305156b small fixes
cin
parents: 1
diff changeset
464
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
465 return medium;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
466 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
467
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
468 public IPromise<TNew> Chain<TNew>(Func<T, IPromise<TNew>> chained, Func<Exception,IPromise<TNew>> error) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
469 return Chain(chained, error, null);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
470 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
471
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
472 public IPromise<TNew> Chain<TNew>(Func<T, IPromise<TNew>> chained) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
473 return Chain(chained, null, null);
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
474 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
475
26
f0bf98e4d22c refactoring
cin
parents: 25
diff changeset
476 public IPromise<T> Cancelled(Action handler) {
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
477 var medium = new Promise<T>(this);
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
478 AddHandler(null, null, handler, medium, false);
74
c4140283575c minor fixes
cin
parents: 72
diff changeset
479 return medium;
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
480 }
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
481
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
482 /// <summary>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
483 /// Adds the specified handler for all cases (success, error, cancel)
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
484 /// </summary>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
485 /// <param name="handler">The handler that will be called anyway</param>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
486 /// <returns>self</returns>
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
487 public IPromise<T> Anyway(Action handler) {
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
488 Safe.ArgumentNotNull(handler, "handler");
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
489
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
490 var medium = new Promise<T>(this);
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
491
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
492 AddHandler(
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
493 x => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
494 handler();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
495 return x;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
496 },
72
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
497 e => {
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
498 handler();
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
499 throw new TransientPromiseException(e);
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
500 },
d67b95eddaf4 promises refactoring
cin
parents: 71
diff changeset
501 handler,
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
502 medium,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
503 true
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
504 );
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
505
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
506 return medium;
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
507 }
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
508
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
509 /// <summary>
29
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
510 /// Преобразует результат обещания к нужному типу
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
511 /// </summary>
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
512 /// <typeparam name="T2"></typeparam>
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
513 /// <returns></returns>
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
514 public IPromise<T2> Cast<T2>() {
75
4439140706d0 major refactoring, added tasks support
cin
parents: 74
diff changeset
515 return Then(x => (T2)(object)x, null);
29
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
516 }
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
517
768f7deeb55b Added a casting method for promises.
cin
parents: 28
diff changeset
518 /// <summary>
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
519 /// Дожидается отложенного обещания и в случае успеха, возвращает
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
520 /// его, результат, в противном случае бросает исключение.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
521 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
522 /// <remarks>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
523 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
524 /// Если ожидание обещания было прервано по таймауту, это не значит,
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
525 /// что обещание было отменено или что-то в этом роде, это только
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
526 /// означает, что мы его не дождались, однако все зарегистрированные
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
527 /// обработчики, как были так остались и они будут вызваны, когда
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
528 /// обещание будет выполнено.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
529 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
530 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
531 /// Такое поведение вполне оправдано поскольку таймаут может истечь
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
532 /// в тот момент, когда началась обработка цепочки обработчиков, и
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
533 /// к тому же текущее обещание может стоять в цепочке обещаний и его
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
534 /// отклонение может привести к непрогнозируемому результату.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
535 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
536 /// </remarks>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
537 /// <param name="timeout">Время ожидания</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
538 /// <returns>Результат выполнения обещания</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
539 public T Join(int timeout) {
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
540 var evt = new ManualResetEvent(false);
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
541 Anyway(() => evt.Set());
2
aa367305156b small fixes
cin
parents: 1
diff changeset
542
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
543 if (!evt.WaitOne(timeout, true))
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
544 throw new TimeoutException();
2
aa367305156b small fixes
cin
parents: 1
diff changeset
545
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
546 switch (m_state) {
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
547 case SUCCEEDED_STATE:
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
548 return m_result;
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
549 case CANCELLED_STATE:
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
550 throw new OperationCanceledException();
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
551 case REJECTED_STATE:
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
552 throw new TargetInvocationException(m_error);
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
553 default:
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
554 throw new ApplicationException(String.Format("Invalid promise state {0}", m_state));
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
555 }
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
556 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
557
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
558 public T Join() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
559 return Join(Timeout.Infinite);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
560 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
561
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
562 void AddHandler<T2>(Func<T,T2> success, Func<Exception,T2> error, Action cancel, Promise<T2> medium, bool inc) {
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
563 if (inc)
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
564 Interlocked.Increment(ref m_childrenCount);
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
565
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
566 AbstractHandler handler = new HandlerDescriptor<T2>(success, error, cancel, medium);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
567
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
568 bool queued;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
569
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
570 if (!IsResolved) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
571 m_handlers.Enqueue(handler);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
572 queued = true;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
573 } else {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
574 // the promise is in resolved state, just invoke the handled with minimum overhead
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
575 queued = false;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
576 InvokeHandler(handler);
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
577 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
578
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
579 if (queued && IsResolved && m_handlers.TryDequeue(out handler))
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
580 // if the promise have been resolved while we was adding handler to the queue
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
581 // we can't guarantee that someone is still processing it
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
582 // therefore we will fetch a handler from the queue and execute it
27
cin
parents: 26
diff changeset
583 // note that fetched handler may be not the one that we have added
cin
parents: 26
diff changeset
584 // even we can fetch no handlers at all :)
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
585 InvokeHandler(handler);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
586 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
587
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
588 protected virtual void InvokeHandler(AbstractHandler handler) {
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
589 switch (m_state) {
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
590 case SUCCEEDED_STATE:
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
591 handler.Resolve(m_result);
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
592 break;
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
593 case REJECTED_STATE:
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
594 handler.Reject(m_error);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
595 break;
71
1714fd8678ef code cleanup
cin
parents: 66
diff changeset
596 case CANCELLED_STATE:
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
597 handler.Cancel();
10
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
598 break;
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
599 default:
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
600 // do nothing
aa33d0bb8c0c implemeted new cancellable promises concept
cin
parents: 9
diff changeset
601 return;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
602 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
603 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
604
65
653c4e04968b minor changes
cin
parents: 33
diff changeset
605 void OnStateChanged() {
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
606 AbstractHandler handler;
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
607 while (m_handlers.TryDequeue(out handler))
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
608 InvokeHandler(handler);
11
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
609 }
6ec82bf68c8e refactoring
cin
parents: 10
diff changeset
610
9
cin
parents: 7
diff changeset
611 public bool IsExclusive {
cin
parents: 7
diff changeset
612 get {
19
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks
cin
parents: 16
diff changeset
613 return m_childrenCount <= 1;
9
cin
parents: 7
diff changeset
614 }
cin
parents: 7
diff changeset
615 }
cin
parents: 7
diff changeset
616
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
617 /// <summary>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
618 /// Объединяет несколько обещаний в одно, результатом которого является массив результатов других обещаний.
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
619 /// Если хотябы одно из переданных обещаний не будет выполнено, то новое обещение тоже не будет выполнено.
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
620 /// При отмене нового обещания, переданные обещания также будут отменены, если никто больше на них не подписан.
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
621 /// </summary>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
622 /// <param name="promises">Список обещаний. Если список пустой, то результирующее обещание возвращается уже выполненным.</param>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
623 /// <returns>Обещание объединяющее в себе результат переданных обещаний.</returns>
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
624 /// <exception cref="ArgumentNullException"><paramref name="promises"/> не может быть null</exception>
30
2fad2d1f4b03 small refactoring, cleanup.
cin
parents: 29
diff changeset
625 public static IPromise<T[]> CreateComposite(IList<IPromise<T>> promises) {
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
626 if (promises == null)
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
627 throw new ArgumentNullException();
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
628
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
629 // создаем аккумулятор для результатов и результирующее обещание
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
630 var result = new T[promises.Count];
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
631 var promise = new Promise<T[]>();
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
632
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
633 // special case
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
634 if (promises.Count == 0) {
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
635 promise.Resolve(result);
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
636 return promise;
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
637 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
638
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
639 int pending = promises.Count;
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
640
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
641 for (int i = 0; i < promises.Count; i++) {
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
642 var dest = i;
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
643
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
644 if (promises[i] != null) {
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
645 promises[i].On(
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
646 x => {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
647 result[dest] = x;
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
648 if (Interlocked.Decrement(ref pending) == 0)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
649 promise.Resolve(result);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
650 },
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
651 promise.Reject
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
652 );
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
653 } else {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
654 if (Interlocked.Decrement(ref pending) == 0)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
655 promise.Resolve(result);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
656 }
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
657 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
658
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
659 promise.Cancelled(
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
660 () => {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
661 foreach (var d in promises)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
662 if (d != null && d.IsExclusive)
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
663 d.Cancel();
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
664 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
665 );
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
666
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
667 return promise;
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
668 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
669
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
670 /// <summary>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
671 /// Объединяет несколько обещаний в одно. Результирующее обещание будет выполнено при
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
672 /// выполнении всех указанных обещаний. При этом возвращаемые значения первичных обещаний
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
673 /// игнорируются.
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
674 /// </summary>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
675 /// <param name="promises">Коллекция первичных обещаний, которые будут объеденены в одно.</param>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
676 /// <returns>Новое обещание, объединяющее в себе переданные.</returns>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
677 /// <remarks>
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
678 /// Если в коллекции встречаюься <c>null</c>, то они воспринимаются как выполненные обещания.
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
679 /// </remarks>
66
790e8a997d30 Refactoring
cin
parents: 65
diff changeset
680 public static IPromise CreateComposite(ICollection<IPromise> promises) {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
681 if (promises == null)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
682 throw new ArgumentNullException();
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
683 if (promises.Count == 0)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
684 return Promise<object>.ResultToPromise(null);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
685
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
686 int countdown = promises.Count;
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
687
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
688 var result = new Promise<object>();
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
689
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
690 foreach (var d in promises) {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
691 if (d == null) {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
692 if (Interlocked.Decrement(ref countdown) == 0)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
693 result.Resolve(null);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
694 } else {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
695 d.Then(() => {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
696 if (Interlocked.Decrement(ref countdown) == 0)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
697 result.Resolve(null);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
698 });
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
699 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
700 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
701
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
702 result.Cancelled(() => {
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
703 foreach (var d in promises)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
704 if (d != null && d.IsExclusive)
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
705 d.Cancel();
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
706 });
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
707
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
708 return result;
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
709 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
710
25
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
711 public static Promise<T> ResultToPromise(T result) {
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
712 var p = new Promise<T>();
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
713 p.Resolve(result);
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
714 return p;
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
715 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
716
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
717 public static Promise<T> ExceptionToPromise(Exception error) {
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
718 if (error == null)
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
719 throw new ArgumentNullException();
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
720
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
721 var p = new Promise<T>();
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
722 p.Reject(error);
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
723 return p;
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
724 }
9bf5b23650c9 refactoring
cin
parents: 19
diff changeset
725
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
726 #region IPromiseBase explicit implementation
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
727
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
728 IPromise IPromise.Then(Action success, Action<Exception> error, Action cancel) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
729 return Then(
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
730 success != null ? new Func<T,T>(x => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
731 success();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
732 return x;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
733 }) : null,
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
734 error != null ? new Func<Exception,T>(e => {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
735 error(e);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
736 return default(T);
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
737 }) : null,
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
738 cancel
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
739 );
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
740 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
741
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
742 IPromise IPromise.Then(Action success, Action<Exception> error) {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
743 return Then(
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
744 success != null ? new Func<T,T>(x => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
745 success();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
746 return x;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
747 }) : null,
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
748 error != null ? new Func<Exception,T>(e => {
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
749 error(e);
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
750 return default(T);
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
751 }) : null
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
752 );
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
753 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
754
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
755 IPromise IPromise.Then(Action success) {
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
756 Safe.ArgumentNotNull(success, "success");
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
757 return Then(x => {
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
758 success();
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
759 return x;
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
760 });
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
761 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
762
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
763 IPromise IPromise.Chain(Func<IPromise> chained, Func<Exception,IPromise> error, Action cancel) {
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
764 return ChainNoResult(chained, error, cancel);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
765 }
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
766
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
767 IPromise ChainNoResult(Func<IPromise> chained, Func<Exception,IPromise> error, Action cancel) {
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
768 Safe.ArgumentNotNull(chained, "chained");
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
769
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
770 var medium = new Promise<object>(this);
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
771
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
772 Func<T,T> resultHandler = delegate {
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
773 if (medium.IsCancelled)
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
774 return default(T);
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
775
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
776 var promise = chained();
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
777
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
778 promise.On(
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
779 medium.Resolve,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
780 medium.Reject,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
781 () => medium.Reject(new OperationCanceledException()) // внешняя отмена связанной операции рассматривается как ошибка
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
782 );
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
783
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
784 // notify chained operation that it's not needed anymore
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
785 // порядок вызова Then, Cancelled важен, поскольку от этого
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
786 // зависит IsExclusive
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
787 medium.Cancelled(() => {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
788 if (promise.IsExclusive)
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
789 promise.Cancel();
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
790 });
106
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
791
d4e38929ce36 promises refactoring
cin
parents: 105
diff changeset
792 return default(T);
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
793 };
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
794
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
795 Func<Exception,T> errorHandler;
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
796
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
797 if (error != null)
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
798 errorHandler = delegate(Exception e) {
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
799 try {
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
800 var promise = error(e);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
801
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
802 promise.On(
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
803 medium.Resolve,
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
804 medium.Reject,
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
805 () => medium.Reject(new OperationCanceledException()) // внешняя отмена связанной операции рассматривается как ошибка
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
806 );
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
807
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
808 // notify chained operation that it's not needed anymore
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
809 // порядок вызова Then, Cancelled важен, поскольку от этого
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
810 // зависит IsExclusive
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
811 medium.Cancelled(() => {
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
812 if (promise.IsExclusive)
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
813 promise.Cancel();
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
814 });
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
815 } catch (Exception e2) {
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
816 medium.Reject(e2);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
817 }
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
818 return default(T);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
819 };
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
820 else
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
821 errorHandler = err => {
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
822 medium.Reject(err);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
823 return default(T);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
824 };
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
825
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
826
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
827 Action cancelHandler;
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
828 if (cancel != null)
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
829 cancelHandler = () => {
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
830 if (cancel != null)
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
831 cancel();
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
832 medium.Cancel();
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
833 };
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
834 else
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
835 cancelHandler = medium.Cancel;
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
836
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
837 AddHandler(
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
838 resultHandler,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
839 errorHandler,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
840 cancelHandler,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
841 null,
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
842 true
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
843 );
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
844
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
845 return medium;
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
846 }
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
847
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
848 IPromise IPromise.Chain(Func<IPromise> chained, Func<Exception,IPromise> error) {
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
849 return ChainNoResult(chained, error, null);
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
850 }
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
851
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
852 IPromise IPromise.Chain(Func<IPromise> chained) {
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
853 return ChainNoResult(chained, null, null);
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
854 }
96
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
855
daffa72a1cec Added the chaining method to the non-generic IPromise
cin
parents: 80
diff changeset
856
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
857 void IPromise.On(Action success, Action<Exception> error, Action cancel) {
105
4d308952fd5e minor fixes
cin
parents: 104
diff changeset
858 On(success != null ? new Action<T>(x => success()) : null, error, cancel);
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
859 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
860
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
861 void IPromise.On(Action success, Action<Exception> error) {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
862 On(x => success(), error, null);
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
863 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
864
104
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
865 void IPromise.On(Action success) {
5f10d54b45df renamed Promise.Last -> Promise.On
cin
parents: 101
diff changeset
866 On(x => success(), null, null);
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
867 }
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
868
101
279e226dffdd code cleanup
cin
parents: 99
diff changeset
869 IPromise IPromise.Error(Action<Exception> error) {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
870 return Error(error);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
871 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
872
76
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
873 IPromise IPromise.Anyway(Action handler) {
c761fc982e1d Refactoring of the IPromise<T> interface
cin
parents: 75
diff changeset
874 return Anyway(handler);
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
875 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
876
66
790e8a997d30 Refactoring
cin
parents: 65
diff changeset
877 IPromise IPromise.Cancelled(Action handler) {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
878 return Cancelled(handler);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
879 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
880
66
790e8a997d30 Refactoring
cin
parents: 65
diff changeset
881 void IPromise.Join() {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
882 Join();
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
883 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
884
66
790e8a997d30 Refactoring
cin
parents: 65
diff changeset
885 void IPromise.Join(int timeout) {
33
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
886 Join(timeout);
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
887 }
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
888
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
889 #endregion
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
890
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
891
b255e4aeef17 removed the reference to the parent from the promise object this allows
cin
parents: 32
diff changeset
892
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
893 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
894 }