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51ea0904 | 1 | /* |
4ac4a490 | 2 | * Copyright (C) 1996-2017 The Squid Software Foundation and contributors |
51ea0904 | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
51ea0904 CT |
7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 54 Interprocess Communication */ |
10 | ||
51ea0904 CT |
11 | #ifndef SQUID_IPC_FORWARDER_H |
12 | #define SQUID_IPC_FORWARDER_H | |
13 | ||
14 | #include "base/AsyncJob.h" | |
c6983ec7 | 15 | #include "cbdata.h" |
51ea0904 | 16 | #include "ipc/Request.h" |
c6983ec7 FC |
17 | #include "mgr/ActionParams.h" |
18 | ||
51ea0904 CT |
19 | #include <map> |
20 | ||
51ea0904 CT |
21 | namespace Ipc |
22 | { | |
23 | ||
24 | /** Forwards a worker request to coordinator. | |
25 | * Waits for an ACK from Coordinator | |
26 | * Send the data unit with an error response if forwarding fails. | |
27 | */ | |
28 | class Forwarder: public AsyncJob | |
29 | { | |
5c2f68b7 AJ |
30 | CBDATA_CLASS(Forwarder); |
31 | ||
51ea0904 CT |
32 | public: |
33 | Forwarder(Request::Pointer aRequest, double aTimeout); | |
34 | virtual ~Forwarder(); | |
35 | ||
36 | /// finds and calls the right Forwarder upon Coordinator's response | |
37 | static void HandleRemoteAck(unsigned int requestId); | |
38 | ||
39 | /* has-to-be-public AsyncJob API */ | |
40 | virtual void callException(const std::exception& e); | |
41 | ||
42 | protected: | |
43 | /* AsyncJob API */ | |
44 | virtual void start(); | |
45 | virtual void swanSong(); | |
46 | virtual bool doneAll() const; | |
47 | ||
48 | virtual void cleanup(); ///< perform cleanup actions | |
49 | virtual void handleError(); | |
50 | virtual void handleTimeout(); | |
51 | virtual void handleException(const std::exception& e); | |
52 | virtual void handleRemoteAck(); | |
53 | ||
54 | private: | |
55 | static void RequestTimedOut(void* param); | |
56 | void requestTimedOut(); | |
57 | void removeTimeoutEvent(); | |
58 | static AsyncCall::Pointer DequeueRequest(unsigned int requestId); | |
59 | ||
60 | protected: | |
61 | Request::Pointer request; | |
62 | const double timeout; ///< response wait timeout in seconds | |
63 | ||
64 | /// maps request->id to Forwarder::handleRemoteAck callback | |
65 | typedef std::map<unsigned int, AsyncCall::Pointer> RequestsMap; | |
66 | static RequestsMap TheRequestsMap; ///< pending Coordinator requests | |
67 | ||
68 | static unsigned int LastRequestId; ///< last requestId used | |
51ea0904 CT |
69 | }; |
70 | ||
71 | } // namespace Ipc | |
72 | ||
73 | #endif /* SQUID_IPC_FORWARDER_H */ | |
f53969cc | 74 |