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8822ebee AR |
1 | /* |
2 | * $Id$ | |
3 | * | |
4 | * DEBUG: section 16 Cache Manager API | |
5 | * | |
6 | */ | |
7 | ||
8 | #ifndef SQUID_MGR_INQUIRER_H | |
9 | #define SQUID_MGR_INQUIRER_H | |
10 | ||
11 | #include "base/AsyncJobCalls.h" | |
12 | #include "base/AsyncJob.h" | |
c3e8e4e9 | 13 | #include "comm/forward.h" |
8822ebee AR |
14 | #include "ipc/StrandCoords.h" |
15 | #include "MemBuf.h" | |
16 | #include "mgr/Action.h" | |
17 | #include "mgr/Request.h" | |
18 | #include <map> | |
19 | ||
20 | class CommIoCbParams; | |
21 | class CommCloseCbParams; | |
22 | ||
23 | namespace Mgr | |
24 | { | |
25 | ||
26 | /// Coordinator's job that sends a cache manage request to each strand, | |
27 | /// aggregating individual strand responses and dumping the result if needed | |
28 | class Inquirer: public AsyncJob | |
29 | { | |
30 | public: | |
c3e8e4e9 | 31 | Inquirer(Action::Pointer anAction, const Comm::ConnectionPointer &conn, const Request &aCause, |
d9fc6862 | 32 | const Ipc::StrandCoords &coords); |
8822ebee AR |
33 | virtual ~Inquirer(); |
34 | ||
35 | /// finds and calls the right Inquirer upon strand's response | |
36 | static void HandleRemoteAck(const Mgr::Response& response); | |
37 | ||
38 | protected: | |
39 | /* AsyncJob API */ | |
40 | virtual void start(); | |
41 | virtual void swanSong(); | |
42 | virtual bool doneAll() const; | |
43 | virtual const char *status() const; | |
44 | ||
45 | private: | |
46 | typedef UnaryMemFunT<Inquirer, Response, const Response&> HandleAckDialer; | |
47 | ||
48 | void inquire(); | |
49 | void noteWroteHeader(const CommIoCbParams& params); | |
50 | void noteCommClosed(const CommCloseCbParams& params); | |
51 | ||
52 | void handleRemoteAck(const Response& response); | |
53 | ||
54 | static AsyncCall::Pointer DequeueRequest(unsigned int requestId); | |
55 | ||
56 | static void RequestTimedOut(void* param); | |
57 | void requestTimedOut(); | |
58 | void removeTimeoutEvent(); | |
59 | ||
60 | void close(); | |
61 | void removeCloseHandler(); | |
62 | ||
63 | private: | |
64 | Action::Pointer aggrAction; //< action to aggregate | |
65 | ||
66 | Request cause; ///< cache manager request received from HTTP client | |
c3e8e4e9 | 67 | Comm::ConnectionPointer clientConnection; ///< HTTP client socket descriptor |
8822ebee AR |
68 | |
69 | Ipc::StrandCoords strands; ///< all strands we want to query, in order | |
70 | Ipc::StrandCoords::const_iterator pos; ///< strand we should query now | |
71 | ||
72 | unsigned int requestId; ///< ID of our outstanding request to strand | |
73 | AsyncCall::Pointer writer; ///< comm_write callback | |
74 | AsyncCall::Pointer closer; ///< comm_close handler | |
75 | const double timeout; ///< number of seconds to wait for strand response | |
76 | ||
77 | /// maps requestId to Inquirer::handleRemoteAck callback | |
78 | typedef std::map<unsigned int, AsyncCall::Pointer> RequestsMap; | |
79 | static RequestsMap TheRequestsMap; ///< pending strand requests | |
80 | ||
81 | static unsigned int LastRequestId; ///< last requestId used | |
82 | ||
83 | CBDATA_CLASS2(Inquirer); | |
84 | }; | |
85 | ||
86 | } // namespace Mgr | |
87 | ||
88 | #endif /* SQUID_MGR_INQUIRER_H */ |