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51ea0904 | 1 | /* |
77b1029d | 2 | * Copyright (C) 1996-2020 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. | |
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7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 54 Interprocess Communication */ |
10 | ||
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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 | ||
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19 | #include <map> |
20 | ||
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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 | { | |
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30 | CBDATA_CLASS(Forwarder); |
31 | ||
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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 | ||
51ea0904 CT |
48 | virtual void handleError(); |
49 | virtual void handleTimeout(); | |
50 | virtual void handleException(const std::exception& e); | |
51ea0904 CT |
51 | |
52 | private: | |
53 | static void RequestTimedOut(void* param); | |
54 | void requestTimedOut(); | |
55 | void removeTimeoutEvent(); | |
7a5451fe | 56 | |
9e930115 AR |
57 | void handleRemoteAck(); |
58 | ||
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59 | static AsyncCall::Pointer DequeueRequest(unsigned int requestId); |
60 | ||
61 | protected: | |
62 | Request::Pointer request; | |
63 | const double timeout; ///< response wait timeout in seconds | |
64 | ||
65 | /// maps request->id to Forwarder::handleRemoteAck callback | |
66 | typedef std::map<unsigned int, AsyncCall::Pointer> RequestsMap; | |
67 | static RequestsMap TheRequestsMap; ///< pending Coordinator requests | |
68 | ||
69 | static unsigned int LastRequestId; ///< last requestId used | |
51ea0904 CT |
70 | }; |
71 | ||
72 | } // namespace Ipc | |
73 | ||
74 | #endif /* SQUID_IPC_FORWARDER_H */ | |
f53969cc | 75 |