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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.26.2.9.2.2

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: 
1.26.2.7  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: 
1.26.2.9.2.2! paf        12: static const char* IDENT_SQL_DRIVER_MANAGER_H="$Date: 2003/03/18 15:14:16 $";
1.26.2.9.2.1  paf        13: 
1.1       paf        14: 
                     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: 
1.26.2.9.2.1  paf        35:        typedef Hash<String* , SQL_Driver *> driver_cache_type;
                     36:        typedef Hash<String* , object_ptr<Stack<SQL_ConnectionPtr> > > connection_cache_type;
1.26.2.8  paf        37: 
                     38: private:
                     39:        
1.14      paf        40:        friend class SQL_Connection;
1.26.2.4  paf        41: 
1.26.2.9  paf        42:        bool is_dlinited;
1.26.2.4  paf        43:        Pool driver_cache_pool;
                     44:        driver_cache_type driver_cache;
                     45:        connection_cache_type connection_cache;
                     46: 
1.1       paf        47: public:
                     48: 
1.26.2.1  paf        49:        SQL_Driver_manager();
                     50:        override ~SQL_Driver_manager();
1.1       paf        51: 
                     52:        /** 
                     53:                connect to specified url, 
                     54:                using driver dynamic library found in table, if not loaded yet
                     55:                checks driver version
                     56:        */
1.26.2.9.2.1  paf        57:        SQL_ConnectionPtr get_connection(const String& arequest_url, const String& aorigin,
1.10      parser     58:                Table *protocol2driver_and_client);
1.1       paf        59: 
                     60: private: // driver cache
                     61: 
1.26.2.4  paf        62:        SQL_Driver *get_driver_from_cache(driver_cache_type::key_type protocol);
                     63:        void put_driver_to_cache(driver_cache_type::key_type protocol, driver_cache_type::value_type driver);
1.1       paf        64: 
                     65: private: // connection cache
                     66: 
1.26.2.4  paf        67:        SQL_ConnectionPtr get_connection_from_cache(connection_cache_type::key_type url);
                     68:        void put_connection_to_cache(connection_cache_type::key_type url, 
                     69:                SQL_ConnectionPtr connection);
1.7       parser     70: private:
                     71:        time_t prev_expiration_pass_time;
1.1       paf        72: 
                     73: private: // for SQL_Connection
                     74: 
                     75:        /// caches connection
1.26.2.4  paf        76:        void close_connection(connection_cache_type::key_type url, 
                     77:                SQL_ConnectionPtr connection);
1.15      paf        78: 
1.17      paf        79: public: // Cache_manager
1.15      paf        80: 
1.26.2.9.2.2! paf        81:        override Value* get_status(const String* source);
1.26.2.2  paf        82:        override void maybe_expire_cache();
1.15      paf        83: 
1.1       paf        84: };
                     85: 
                     86: /// global
1.26.2.1  paf        87: extern SQL_Driver_manager SQL_driver_manager;
1.1       paf        88: 
                     89: #endif