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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.26.2.5

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: 
1.26.2.5! paf        12: static const char* IDENT_SQL_DRIVER_MANAGER_H="$Date: 2003/01/28 09:48:16 $";
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: 
1.26.2.5! paf        29: class SQL_Connection;  DECLARE_OBJECT_PTR (SQL_Connection);
1.1       paf        30: 
1.11      parser     31: /// sql driver manager
1.26.2.1  paf        32: class SQL_Driver_manager: public Cache_manager {
1.14      paf        33:        friend class SQL_Connection;
1.26.2.4  paf        34: 
                     35:        Pool driver_cache_pool;
                     36:        typedef Hash<ConstStringPtr, SQL_Driver *> driver_cache_type;
                     37:        driver_cache_type driver_cache;
                     38:        typedef Hash<ConstStringPtr, object_ptr<Stack<SQL_ConnectionPtr> > > connection_cache_type;
                     39:        connection_cache_type connection_cache;
                     40: 
1.1       paf        41: public:
                     42: 
1.26.2.1  paf        43:        SQL_Driver_manager();
                     44:        override ~SQL_Driver_manager();
1.1       paf        45: 
                     46:        /** 
                     47:                connect to specified url, 
                     48:                using driver dynamic library found in table, if not loaded yet
                     49:                checks driver version
                     50:        */
1.26.2.4  paf        51:        SQL_ConnectionPtr get_connection(Pool& pool, ConstStringPtr arequest_url, ConstStringPtr aorigin,
1.10      parser     52:                Table *protocol2driver_and_client);
1.1       paf        53: 
                     54: private: // driver cache
                     55: 
1.26.2.4  paf        56:        SQL_Driver *get_driver_from_cache(driver_cache_type::key_type protocol);
                     57:        void put_driver_to_cache(driver_cache_type::key_type protocol, driver_cache_type::value_type driver);
1.1       paf        58: 
                     59: private: // connection cache
                     60: 
1.26.2.4  paf        61:        SQL_ConnectionPtr get_connection_from_cache(connection_cache_type::key_type url);
                     62:        void put_connection_to_cache(connection_cache_type::key_type url, 
                     63:                SQL_ConnectionPtr connection);
1.7       parser     64: private:
                     65:        time_t prev_expiration_pass_time;
1.1       paf        66: 
                     67: private: // for SQL_Connection
                     68: 
                     69:        /// caches connection
1.26.2.4  paf        70:        void close_connection(connection_cache_type::key_type url, 
                     71:                SQL_ConnectionPtr connection);
1.15      paf        72: 
1.17      paf        73: public: // Cache_manager
1.15      paf        74: 
1.26.2.2  paf        75:        override ValuePtr get_status(Pool& pool, ConstStringPtr source);
                     76:        override void maybe_expire_cache();
1.15      paf        77: 
1.1       paf        78: };
                     79: 
                     80: /// global
1.26.2.1  paf        81: extern SQL_Driver_manager SQL_driver_manager;
1.1       paf        82: 
                     83: #endif