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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.20

1.1       paf         1: /** @file
1.2       paf         2:        Parser: sql driver manager decl.
1.10      parser      3:        global sql driver manager, must be thread-safe
1.1       paf         4: 
                      5:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.16      paf         6:        Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.1       paf         7: 
1.20    ! paf         8:        $Id: pa_sql_driver_manager.h,v 1.19 2001/12/13 11:09:46 paf Exp $
1.1       paf         9: */
                     10: 
                     11: #ifndef PA_SQL_DRIVER_MANAGER_H
                     12: #define PA_SQL_DRIVER_MANAGER_H
                     13: 
                     14: #include "pa_pool.h"
                     15: #include "pa_sql_driver.h"
                     16: #include "pa_hash.h"
                     17: #include "pa_table.h"
                     18: #include "pa_string.h"
1.17      paf        19: #include "pa_cache_managers.h"
1.8       parser     20: 
                     21: // defines
                     22: 
                     23: #define MAIN_SQL_NAME "SQL"
                     24: #define MAIN_SQL_DRIVERS_NAME "drivers"
                     25: 
                     26: // forwards
1.1       paf        27: 
                     28: class SQL_Connection;
                     29: 
1.11      parser     30: /// sql driver manager
1.18      paf        31: class SQL_Driver_manager : public Cache_manager {
1.14      paf        32:        friend class SQL_Connection;
1.1       paf        33: public:
                     34: 
1.15      paf        35:        SQL_Driver_manager(Pool& apool);
1.19      paf        36:        virtual ~SQL_Driver_manager();
1.1       paf        37: 
                     38:        /** 
                     39:                connect to specified url, 
                     40:                using driver dynamic library found in table, if not loaded yet
                     41:                checks driver version
                     42:        */
1.10      parser     43:        SQL_Connection& get_connection(const String& url, const String& request_origin,
                     44:                Table *protocol2driver_and_client);
1.1       paf        45: 
                     46: private: // driver cache
                     47: 
                     48:        SQL_Driver *get_driver_from_cache(const String& protocol);
                     49:        void put_driver_to_cache(const String& protocol, SQL_Driver& driver);
                     50: 
                     51: private: // connection cache
                     52: 
                     53:        SQL_Connection *get_connection_from_cache(const String& url);
                     54:        void put_connection_to_cache(const String& url, SQL_Connection& connection);
1.7       parser     55: private:
                     56:        time_t prev_expiration_pass_time;
1.1       paf        57: 
                     58: private: // for SQL_Connection
                     59: 
                     60:        /// caches connection
1.6       parser     61:        void close_connection(const String& url, SQL_Connection& connection);
1.1       paf        62: 
                     63: private:
                     64: 
                     65:        Hash driver_cache;
                     66:        Hash connection_cache;
1.15      paf        67: 
1.17      paf        68: public: // Cache_manager
1.15      paf        69: 
                     70:        virtual Value& get_status(Pool& pool, const String *source);
1.17      paf        71:        virtual void maybe_expire_cache();
1.15      paf        72: 
1.1       paf        73: };
                     74: 
                     75: /// global
                     76: extern SQL_Driver_manager *SQL_driver_manager;
                     77: 
                     78: #endif