projects / thirdparty / squid.git / blame
| Commit | Line | Data |
|---|---|---|
| 51ea0904 | 1 | /* |
| 51ea0904 CT |
2 | * DEBUG: section 54 Interprocess Communication |
| 3 | * | |
| 4 | */ | |
| 5 | ||
| 6 | #ifndef SQUID_IPC_INQUIRER_H | |
| 7 | #define SQUID_IPC_INQUIRER_H | |
| 8 | ||
| 51ea0904 | 9 | #include "base/AsyncJob.h" |
| 602d9612 | 10 | #include "base/AsyncJobCalls.h" |
| 51ea0904 CT |
11 | #include "ipc/forward.h" |
| 12 | #include "ipc/Request.h" | |
| 13 | #include "ipc/Response.h" | |
| 14 | #include "ipc/StrandCoords.h" | |
| 15 | #include <map> | |
| 16 | ||
| 51ea0904 CT |
17 | namespace Ipc |
| 18 | { | |
| 19 | ||
| 20 | /// Coordinator's job that sends a cache manage request to each strand, | |
| 21 | /// aggregating individual strand responses and dumping the result if needed | |
| 22 | class Inquirer: public AsyncJob | |
| 23 | { | |
| 24 | public: | |
| 25 | Inquirer(Request::Pointer aRequest, const Ipc::StrandCoords& coords, double aTimeout); | |
| 26 | virtual ~Inquirer(); | |
| 27 | ||
| 28 | /// finds and calls the right Inquirer upon strand's response | |
| 29 | static void HandleRemoteAck(const Response& response); | |
| 30 | ||
| 31 | /* has-to-be-public AsyncJob API */ | |
| 32 | virtual void callException(const std::exception& e); | |
| 33 | ||
| 34 | protected: | |
| 35 | /* AsyncJob API */ | |
| 36 | virtual void start(); | |
| 37 | virtual void swanSong(); | |
| 38 | virtual bool doneAll() const; | |
| 39 | virtual const char *status() const; | |
| 40 | ||
| 41 | /// inquire the next strand | |
| 42 | virtual void inquire(); | |
| 43 | /// perform cleanup actions on completion of job | |
| 44 | virtual void cleanup(); | |
| 45 | /// do specific exception handling | |
| 46 | virtual void handleException(const std::exception& e); | |
| 47 | /// send response to client | |
| 48 | virtual void sendResponse() = 0; | |
| 49 | /// perform aggregating of responses and returns true if need to continue | |
| 50 | virtual bool aggregate(Response::Pointer aResponse) = 0; | |
| 51 | ||
| 52 | private: | |
| 53 | typedef UnaryMemFunT<Inquirer, Response::Pointer, Response::Pointer> HandleAckDialer; | |
| 54 | ||
| 55 | void handleRemoteAck(Response::Pointer response); | |
| 56 | ||
| 57 | static AsyncCall::Pointer DequeueRequest(unsigned int requestId); | |
| 58 | ||
| 59 | static void RequestTimedOut(void* param); | |
| 60 | void requestTimedOut(); | |
| 61 | void removeTimeoutEvent(); | |
| 62 | ||
| 63 | protected: | |
| 64 | Request::Pointer request; ///< cache manager request received from client | |
| 65 | ||
| 66 | Ipc::StrandCoords strands; ///< all strands we want to query, in order | |
| 67 | Ipc::StrandCoords::const_iterator pos; ///< strand we should query now | |
| 68 | ||
| 69 | const double timeout; ///< number of seconds to wait for strand response | |
| 70 | ||
| 71 | /// maps request->id to Inquirer::handleRemoteAck callback | |
| 72 | typedef std::map<unsigned int, AsyncCall::Pointer> RequestsMap; | |
| 73 | static RequestsMap TheRequestsMap; ///< pending strand requests | |
| 74 | ||
| 75 | static unsigned int LastRequestId; ///< last requestId used | |
| 76 | ||
| 77 | CBDATA_CLASS2(Inquirer); | |
| 78 | }; | |
| 79 | ||
| 80 | } // namespace Ipc | |
| 81 | ||
| 82 | #endif /* SQUID_IPC_INQUIRER_H */ |