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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.26.2.2

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: 
1.26.2.2! paf        12: static const char* IDENT_SQL_DRIVER_MANAGER_H="$Date: 2003/01/27 16:00:41 $";
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;
1.1       paf        35: public:
                     36: 
1.26.2.1  paf        37:        SQL_Driver_manager();
                     38:        override ~SQL_Driver_manager();
1.1       paf        39: 
                     40:        /** 
                     41:                connect to specified url, 
                     42:                using driver dynamic library found in table, if not loaded yet
                     43:                checks driver version
                     44:        */
1.26.2.2! paf        45:        SQL_ConnectionPtr get_connection(Pool& pool, ConstStringPtr aurl, ConstStringPtr aorigin,
1.10      parser     46:                Table *protocol2driver_and_client);
1.1       paf        47: 
                     48: private: // driver cache
                     49: 
1.26.2.2! paf        50:        SQL_Driver *get_driver_from_cache(ConstStringPtr protocol);
        !            51:        void put_driver_to_cache(ConstStringPtr protocol, SQL_Driver& driver);
1.1       paf        52: 
                     53: private: // connection cache
                     54: 
1.26.2.2! paf        55:        SQL_Connection *get_connection_from_cache(ConstStringPtr url);
        !            56:        void put_connection_to_cache(ConstStringPtr url, SQL_Connection& connection);
1.7       parser     57: private:
                     58:        time_t prev_expiration_pass_time;
1.1       paf        59: 
                     60: private: // for SQL_Connection
                     61: 
                     62:        /// caches connection
1.26.2.2! paf        63:        void close_connection(ConstStringPtr url, SQL_Connection& connection);
1.1       paf        64: 
                     65: private:
                     66: 
1.26.2.1  paf        67:        Hash<const String&, SQL_Driver *> driver_cache;
1.26.2.2! paf        68:        Hash<const String&, Stack<SQL_Connection&> *> connection_cache;
1.15      paf        69: 
1.17      paf        70: public: // Cache_manager
1.15      paf        71: 
1.26.2.2! paf        72:        override ValuePtr get_status(Pool& pool, ConstStringPtr source);
        !            73:        override void maybe_expire_cache();
1.15      paf        74: 
1.1       paf        75: };
                     76: 
                     77: /// global
1.26.2.1  paf        78: extern SQL_Driver_manager SQL_driver_manager;
1.1       paf        79: 
                     80: #endif