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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.2

1.1       paf         1: /** @file
1.2     ! paf         2:        Parser: sql driver manager decl.
1.1       paf         3: 
                      4:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
                      5: 
                      6:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
                      7: 
1.2     ! paf         8:        $Id: pa_sql_driver_manager.h,v 1.1 2001/04/04 10:53:55 paf Exp $
1.1       paf         9: 
                     10: 
                     11:        global sql driver manager, must be thread-safe
                     12: */
                     13: 
                     14: #ifndef PA_SQL_DRIVER_MANAGER_H
                     15: #define PA_SQL_DRIVER_MANAGER_H
                     16: 
                     17: #include "pa_pool.h"
                     18: #include "pa_sql_driver.h"
                     19: #include "pa_hash.h"
                     20: #include "pa_stack.h"
                     21: #include "pa_threads.h"
                     22: #include "pa_table.h"
                     23: #include "pa_string.h"
                     24: 
                     25: class SQL_Connection;
                     26: 
                     27: /// sql driver manager
                     28: class SQL_Driver_manager : public Pooled {
                     29:        friend SQL_Connection;
                     30: public:
                     31: 
                     32:        SQL_Driver_manager(Pool& pool) : Pooled(pool),
                     33:                driver_cache(pool),
                     34:                connection_cache(pool) {
                     35:        }
                     36: 
                     37:        /** 
                     38:                connect to specified url, 
                     39:                using driver dynamic library found in table, if not loaded yet
                     40:                checks driver version
                     41:        */
                     42:        SQL_Connection& get_connection(const String& url, Table *protocol2library);
                     43: 
                     44: private: // driver cache
                     45: 
                     46:        SQL_Driver *get_driver_from_cache(const String& protocol);
                     47:        void put_driver_to_cache(const String& protocol, SQL_Driver& driver);
                     48: 
                     49: private: // connection cache
                     50: 
                     51:        SQL_Connection *get_connection_from_cache(const String& url);
                     52:        void put_connection_to_cache(const String& url, SQL_Connection& connection);
                     53: 
                     54: private: // for SQL_Connection
                     55: 
                     56:        /// caches connection
                     57:        void close_connection(const String& url, SQL_Connection& connection);
                     58: 
                     59: private:
                     60: 
                     61:        Hash driver_cache;
                     62:        Hash connection_cache;
                     63: };
                     64: 
                     65: /// global
                     66: extern SQL_Driver_manager *SQL_driver_manager;
                     67: 
                     68: #endif