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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef REMOTING_JINGLE_GLUE_IQ_SENDER_H_ | |
6 #define REMOTING_JINGLE_GLUE_IQ_SENDER_H_ | |
7 | |
8 #include <map> | |
9 #include <string> | |
10 | |
11 #include "base/callback.h" | |
12 #include "base/compiler_specific.h" | |
13 #include "base/gtest_prod_util.h" | |
14 #include "base/memory/scoped_ptr.h" | |
15 #include "base/memory/weak_ptr.h" | |
16 #include "remoting/jingle_glue/signal_strategy.h" | |
17 | |
18 namespace base { | |
19 class TimeDelta; | |
20 } // namespace base | |
21 | |
22 namespace buzz { | |
23 class XmlElement; | |
24 } // namespace buzz | |
25 | |
26 namespace remoting { | |
27 | |
28 class IqRequest; | |
29 class SignalStrategy; | |
30 | |
31 // IqSender handles sending iq requests and routing of responses to | |
32 // those requests. | |
33 class IqSender : public SignalStrategy::Listener { | |
34 public: | |
35 // Callback that is called when an Iq response is received. Called | |
36 // with the |response| set to NULL in case of a timeout. | |
37 typedef base::Callback<void(IqRequest* request, | |
38 const buzz::XmlElement* response)> ReplyCallback; | |
39 | |
40 explicit IqSender(SignalStrategy* signal_strategy); | |
41 virtual ~IqSender(); | |
42 | |
43 // Send an iq stanza. Returns an IqRequest object that represends | |
44 // the request. |callback| is called when response to |stanza| is | |
45 // received. Destroy the returned IqRequest to cancel the callback. | |
46 // Caller must take ownership of the result. Result must be | |
47 // destroyed before sender is destroyed. | |
48 scoped_ptr<IqRequest> SendIq(scoped_ptr<buzz::XmlElement> stanza, | |
49 const ReplyCallback& callback); | |
50 | |
51 // Same as above, but also formats the message. | |
52 scoped_ptr<IqRequest> SendIq(const std::string& type, | |
53 const std::string& addressee, | |
54 scoped_ptr<buzz::XmlElement> iq_body, | |
55 const ReplyCallback& callback); | |
56 | |
57 // SignalStrategy::Listener implementation. | |
58 virtual void OnSignalStrategyStateChange( | |
59 SignalStrategy::State state) OVERRIDE; | |
60 virtual bool OnSignalStrategyIncomingStanza( | |
61 const buzz::XmlElement* stanza) OVERRIDE; | |
62 | |
63 private: | |
64 typedef std::map<std::string, IqRequest*> IqRequestMap; | |
65 friend class IqRequest; | |
66 | |
67 // Helper function used to create iq stanzas. | |
68 static scoped_ptr<buzz::XmlElement> MakeIqStanza( | |
69 const std::string& type, | |
70 const std::string& addressee, | |
71 scoped_ptr<buzz::XmlElement> iq_body); | |
72 | |
73 // Removes |request| from the list of pending requests. Called by IqRequest. | |
74 void RemoveRequest(IqRequest* request); | |
75 | |
76 SignalStrategy* signal_strategy_; | |
77 IqRequestMap requests_; | |
78 | |
79 DISALLOW_COPY_AND_ASSIGN(IqSender); | |
80 }; | |
81 | |
82 // This call must only be used on the thread it was created on. | |
83 class IqRequest : public base::SupportsWeakPtr<IqRequest> { | |
84 public: | |
85 IqRequest(IqSender* sender, const IqSender::ReplyCallback& callback, | |
86 const std::string& addressee); | |
87 ~IqRequest(); | |
88 | |
89 // Sets timeout for the request. When the timeout expires the | |
90 // callback is called with the |response| set to NULL. | |
91 void SetTimeout(base::TimeDelta timeout); | |
92 | |
93 private: | |
94 friend class IqSender; | |
95 | |
96 void CallCallback(const buzz::XmlElement* stanza); | |
97 void OnTimeout(); | |
98 | |
99 // Called by IqSender when a response is received. | |
100 void OnResponse(const buzz::XmlElement* stanza); | |
101 | |
102 void DeliverResponse(scoped_ptr<buzz::XmlElement> stanza); | |
103 | |
104 IqSender* sender_; | |
105 IqSender::ReplyCallback callback_; | |
106 std::string addressee_; | |
107 | |
108 DISALLOW_COPY_AND_ASSIGN(IqRequest); | |
109 }; | |
110 | |
111 } // namespace remoting | |
112 | |
113 #endif // REMOTING_JINGLE_GLUE_IQ_SENDER_H_ | |
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