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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.26.2.4

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: 
1.26      paf         5:        Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
1.23      paf         6:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1       paf         7: */
                      8: 
                      9: #ifndef PA_SQL_DRIVER_MANAGER_H
                     10: #define PA_SQL_DRIVER_MANAGER_H
1.24      paf        11: 
1.26.2.4! paf        12: static const char* IDENT_SQL_DRIVER_MANAGER_H="$Date: 2003/01/27 17:17:06 $";
1.1       paf        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"
1.26.2.2  paf        20: #include "pa_stack.h"
1.8       parser     21: 
                     22: // defines
                     23: 
                     24: #define MAIN_SQL_NAME "SQL"
                     25: #define MAIN_SQL_DRIVERS_NAME "drivers"
                     26: 
                     27: // forwards
1.1       paf        28: 
                     29: class SQL_Connection;
1.26.2.1  paf        30: DECLARE_OBJECT_PTR (SQL_Connection)
1.1       paf        31: 
1.11      parser     32: /// sql driver manager
1.26.2.1  paf        33: class SQL_Driver_manager: public Cache_manager {
1.14      paf        34:        friend class SQL_Connection;
1.26.2.4! paf        35: 
        !            36:        Pool driver_cache_pool;
        !            37:        typedef Hash<ConstStringPtr, SQL_Driver *> driver_cache_type;
        !            38:        driver_cache_type driver_cache;
        !            39:        typedef Hash<ConstStringPtr, object_ptr<Stack<SQL_ConnectionPtr> > > connection_cache_type;
        !            40:        connection_cache_type connection_cache;
        !            41: 
1.1       paf        42: public:
                     43: 
1.26.2.1  paf        44:        SQL_Driver_manager();
                     45:        override ~SQL_Driver_manager();
1.1       paf        46: 
                     47:        /** 
                     48:                connect to specified url, 
                     49:                using driver dynamic library found in table, if not loaded yet
                     50:                checks driver version
                     51:        */
1.26.2.4! paf        52:        SQL_ConnectionPtr get_connection(Pool& pool, ConstStringPtr arequest_url, ConstStringPtr aorigin,
1.10      parser     53:                Table *protocol2driver_and_client);
1.1       paf        54: 
                     55: private: // driver cache
                     56: 
1.26.2.4! paf        57:        SQL_Driver *get_driver_from_cache(driver_cache_type::key_type protocol);
        !            58:        void put_driver_to_cache(driver_cache_type::key_type protocol, driver_cache_type::value_type driver);
1.1       paf        59: 
                     60: private: // connection cache
                     61: 
1.26.2.4! paf        62:        SQL_ConnectionPtr get_connection_from_cache(connection_cache_type::key_type url);
        !            63:        void put_connection_to_cache(connection_cache_type::key_type url, 
        !            64:                SQL_ConnectionPtr connection);
1.7       parser     65: private:
                     66:        time_t prev_expiration_pass_time;
1.1       paf        67: 
                     68: private: // for SQL_Connection
                     69: 
                     70:        /// caches connection
1.26.2.4! paf        71:        void close_connection(connection_cache_type::key_type url, 
        !            72:                SQL_ConnectionPtr connection);
1.15      paf        73: 
1.17      paf        74: public: // Cache_manager
1.15      paf        75: 
1.26.2.2  paf        76:        override ValuePtr get_status(Pool& pool, ConstStringPtr source);
                     77:        override void maybe_expire_cache();
1.15      paf        78: 
1.1       paf        79: };
                     80: 
                     81: /// global
1.26.2.1  paf        82: extern SQL_Driver_manager SQL_driver_manager;
1.1       paf        83: 
                     84: #endif