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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef REMOTING_CLIENT_PLUGIN_DELEGATING_SIGNAL_STRATEGY_H_ | 5 #ifndef REMOTING_CLIENT_PLUGIN_DELEGATING_SIGNAL_STRATEGY_H_ |
6 #define REMOTING_CLIENT_PLUGIN_DELEGATING_SIGNAL_STRATEGY_H_ | 6 #define REMOTING_CLIENT_PLUGIN_DELEGATING_SIGNAL_STRATEGY_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/macros.h" | 9 #include "base/macros.h" |
10 #include "base/observer_list.h" | 10 #include "base/memory/weak_ptr.h" |
| 11 #include "base/observer_list_threadsafe.h" |
11 #include "remoting/signaling/signal_strategy.h" | 12 #include "remoting/signaling/signal_strategy.h" |
12 | 13 |
13 namespace base { | 14 namespace base { |
14 class SingleThreadTaskRunner; | 15 class SingleThreadTaskRunner; |
15 } // namespace base | 16 } // namespace base |
16 | 17 |
17 namespace remoting { | 18 namespace remoting { |
18 | 19 |
| 20 // A signaling strategy class that delegates IQ sending and receiving. |
| 21 // |
| 22 // Notes on thread safety: |
| 23 // 1. This object can be created on any thread. |
| 24 // 2. OnIncomingMessage() must be called on the same thread on which this object |
| 25 // is created. |
| 26 // 3. |send_iq_callback| will always be called on the thread that it is created. |
| 27 // Note that |send_iq_callback| may be called after this object is destroyed. |
| 28 // 4. The caller should invoke all methods on the SignalStrategy interface on |
| 29 // the |client_task_runner|. |
| 30 // 5. All listeners will be called on |client_task_runner| as well. |
| 31 // 6. The destructor should always be called on the |client_task_runner|. |
19 class DelegatingSignalStrategy : public SignalStrategy { | 32 class DelegatingSignalStrategy : public SignalStrategy { |
20 public: | 33 public: |
21 typedef base::Callback<void(const std::string&)> SendIqCallback; | 34 typedef base::Callback<void(const std::string&)> SendIqCallback; |
22 | 35 |
23 DelegatingSignalStrategy(std::string local_jid, | 36 DelegatingSignalStrategy( |
24 const SendIqCallback& send_iq_callback); | 37 std::string local_jid, |
| 38 scoped_refptr<base::SingleThreadTaskRunner> client_task_runner, |
| 39 const SendIqCallback& send_iq_callback); |
25 ~DelegatingSignalStrategy() override; | 40 ~DelegatingSignalStrategy() override; |
26 | 41 |
27 void OnIncomingMessage(const std::string& message); | 42 void OnIncomingMessage(const std::string& message); |
28 | 43 |
29 // SignalStrategy interface. | 44 // SignalStrategy interface. |
30 void Connect() override; | 45 void Connect() override; |
31 void Disconnect() override; | 46 void Disconnect() override; |
32 State GetState() const override; | 47 State GetState() const override; |
33 Error GetError() const override; | 48 Error GetError() const override; |
34 std::string GetLocalJid() const override; | 49 std::string GetLocalJid() const override; |
35 void AddListener(Listener* listener) override; | 50 void AddListener(Listener* listener) override; |
36 void RemoveListener(Listener* listener) override; | 51 void RemoveListener(Listener* listener) override; |
37 bool SendStanza(std::unique_ptr<buzz::XmlElement> stanza) override; | 52 bool SendStanza(std::unique_ptr<buzz::XmlElement> stanza) override; |
38 std::string GetNextId() override; | 53 std::string GetNextId() override; |
39 | 54 |
40 private: | 55 private: |
41 std::string local_jid_; | 56 std::string local_jid_; |
| 57 scoped_refptr<base::SingleThreadTaskRunner> delegate_task_runner_; |
| 58 scoped_refptr<base::SingleThreadTaskRunner> client_task_runner_; |
| 59 |
42 SendIqCallback send_iq_callback_; | 60 SendIqCallback send_iq_callback_; |
| 61 base::ObserverList<Listener> listeners_; |
43 | 62 |
44 base::ObserverList<Listener> listeners_; | 63 base::WeakPtrFactory<DelegatingSignalStrategy> weak_factory_; |
45 | 64 |
46 DISALLOW_COPY_AND_ASSIGN(DelegatingSignalStrategy); | 65 DISALLOW_COPY_AND_ASSIGN(DelegatingSignalStrategy); |
47 }; | 66 }; |
48 | 67 |
49 } // namespace remoting | 68 } // namespace remoting |
50 | 69 |
51 #endif // REMOTING_CLIENT_PLUGIN_DELEGATING_SIGNAL_STRATEGY_H_ | 70 #endif // REMOTING_CLIENT_PLUGIN_DELEGATING_SIGNAL_STRATEGY_H_ |
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