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1 // Copyright 2015 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 BLIMP_NET_BROWSER_CONNECTION_HANDLER_H_ | |
6 #define BLIMP_NET_BROWSER_CONNECTION_HANDLER_H_ | |
7 | |
8 #include <memory> | |
9 | |
10 #include "base/macros.h" | |
11 #include "blimp/common/proto/blimp_message.pb.h" | |
12 #include "blimp/net/blimp_net_export.h" | |
13 #include "blimp/net/connection_error_observer.h" | |
14 #include "blimp/net/connection_handler.h" | |
15 | |
16 namespace blimp { | |
17 | |
18 class BlimpConnection; | |
19 class BlimpMessageCheckpointer; | |
20 class BlimpMessageDemultiplexer; | |
21 class BlimpMessageMultiplexer; | |
22 class BlimpMessageOutputBuffer; | |
23 class BlimpMessageProcessor; | |
24 | |
25 // Routes incoming messages to their respective features, and buffers and sends | |
26 // messages out via underlying BlimpConnection. | |
27 // A BrowserConnectionHandler is created on browser startup, and persists for | |
28 // the lifetime of the application. | |
29 // BrowserConnectionHandler is created on the UI thread, and then used and | |
30 // destroyed on the IO thread. | |
31 class BLIMP_NET_EXPORT BrowserConnectionHandler | |
32 : public ConnectionHandler, | |
33 public ConnectionErrorObserver { | |
34 public: | |
35 BrowserConnectionHandler(); | |
36 ~BrowserConnectionHandler() override; | |
37 | |
38 // Registers a message processor which will receive all messages of the | |
39 // |feature_case| specified. Only one handler may be added per feature. | |
40 // That caller must ensure |incoming_processor| remains valid while | |
41 // this object is in-use. | |
42 // | |
43 // Returns a BlimpMessageProcessor object for sending messages for a given | |
44 // feature. | |
45 virtual std::unique_ptr<BlimpMessageProcessor> RegisterFeature( | |
46 BlimpMessage::FeatureCase feature_case, | |
47 BlimpMessageProcessor* incoming_processor); | |
48 | |
49 // ConnectionHandler implementation. | |
50 void HandleConnection(std::unique_ptr<BlimpConnection> connection) override; | |
51 | |
52 // ConnectionErrorObserver implementation. | |
53 void OnConnectionError(int error) override; | |
54 | |
55 void DropCurrentConnection(); | |
56 | |
57 private: | |
58 // Routes incoming messages to the relevant feature-specific handlers. | |
59 std::unique_ptr<BlimpMessageDemultiplexer> demultiplexer_; | |
60 | |
61 // Provides buffering of outgoing messages, for use in session-recovery. | |
62 std::unique_ptr<BlimpMessageOutputBuffer> output_buffer_; | |
63 | |
64 // Routes outgoing messages from feature-specific handlers to a single | |
65 // message stream. | |
66 std::unique_ptr<BlimpMessageMultiplexer> multiplexer_; | |
67 | |
68 // Dispatches checkpoint/ACK messages to the outgoing processor, as the | |
69 // incoming processor completes processing them. | |
70 std::unique_ptr<BlimpMessageCheckpointer> checkpointer_; | |
71 | |
72 // Holds network resources while there is a Client connected. | |
73 std::unique_ptr<BlimpConnection> connection_; | |
74 | |
75 DISALLOW_COPY_AND_ASSIGN(BrowserConnectionHandler); | |
76 }; | |
77 | |
78 } // namespace blimp | |
79 | |
80 #endif // BLIMP_NET_BROWSER_CONNECTION_HANDLER_H_ | |
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