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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.26.2.8

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: 
1.26.2.7  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: 
1.26.2.8! paf        12: static const char* IDENT_SQL_DRIVER_MANAGER_H="$Date: 2003/01/31 12:34:31 $";
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 {
1.26.2.8! paf        33: public:
        !            34: 
        !            35:        typedef Hash<StringPtr, SQL_Driver *> driver_cache_type;
        !            36:        typedef Hash<StringPtr, object_ptr<Stack<SQL_ConnectionPtr> > > connection_cache_type;
        !            37: 
        !            38: private:
        !            39:        
1.14      paf        40:        friend class SQL_Connection;
1.26.2.4  paf        41: 
                     42:        Pool driver_cache_pool;
                     43:        driver_cache_type driver_cache;
                     44:        connection_cache_type connection_cache;
                     45: 
1.1       paf        46: public:
                     47: 
1.26.2.1  paf        48:        SQL_Driver_manager();
                     49:        override ~SQL_Driver_manager();
1.1       paf        50: 
                     51:        /** 
                     52:                connect to specified url, 
                     53:                using driver dynamic library found in table, if not loaded yet
                     54:                checks driver version
                     55:        */
1.26.2.6  paf        56:        SQL_ConnectionPtr get_connection(Pool& pool, StringPtr arequest_url, StringPtr aorigin,
1.10      parser     57:                Table *protocol2driver_and_client);
1.1       paf        58: 
                     59: private: // driver cache
                     60: 
1.26.2.4  paf        61:        SQL_Driver *get_driver_from_cache(driver_cache_type::key_type protocol);
                     62:        void put_driver_to_cache(driver_cache_type::key_type protocol, driver_cache_type::value_type driver);
1.1       paf        63: 
                     64: private: // connection cache
                     65: 
1.26.2.4  paf        66:        SQL_ConnectionPtr get_connection_from_cache(connection_cache_type::key_type url);
                     67:        void put_connection_to_cache(connection_cache_type::key_type url, 
                     68:                SQL_ConnectionPtr connection);
1.7       parser     69: private:
                     70:        time_t prev_expiration_pass_time;
1.1       paf        71: 
                     72: private: // for SQL_Connection
                     73: 
                     74:        /// caches connection
1.26.2.4  paf        75:        void close_connection(connection_cache_type::key_type url, 
                     76:                SQL_ConnectionPtr connection);
1.15      paf        77: 
1.17      paf        78: public: // Cache_manager
1.15      paf        79: 
1.26.2.6  paf        80:        override ValuePtr get_status(Pool& pool, StringPtr source);
1.26.2.2  paf        81:        override void maybe_expire_cache();
1.15      paf        82: 
1.1       paf        83: };
                     84: 
                     85: /// global
1.26.2.1  paf        86: extern SQL_Driver_manager SQL_driver_manager;
1.1       paf        87: 
                     88: #endif