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Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.7

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: 
1.7     ! parser      8:        $Id: pa_sql_driver_manager.h,v 1.6 2001/05/17 13:23:28 parser 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: 
1.4       parser     17: #include "pa_config_includes.h"
1.1       paf        18: #include "pa_pool.h"
                     19: #include "pa_sql_driver.h"
                     20: #include "pa_hash.h"
                     21: #include "pa_stack.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),
1.7     ! parser     34:                connection_cache(pool),
        !            35:                prev_expiration_pass_time(0) {
1.1       paf        36:        }
                     37: 
                     38:        /** 
                     39:                connect to specified url, 
                     40:                using driver dynamic library found in table, if not loaded yet
                     41:                checks driver version
                     42:        */
1.3       paf        43:        SQL_Connection& get_connection(const String& url, Table *protocol2driver_and_client);
1.1       paf        44: 
                     45: private: // driver cache
                     46: 
                     47:        SQL_Driver *get_driver_from_cache(const String& protocol);
                     48:        void put_driver_to_cache(const String& protocol, SQL_Driver& driver);
                     49: 
                     50: private: // connection cache
                     51: 
                     52:        SQL_Connection *get_connection_from_cache(const String& url);
                     53:        void put_connection_to_cache(const String& url, SQL_Connection& connection);
1.7     ! parser     54:        void maybe_expire_connection_cache();
        !            55: private:
        !            56:        time_t prev_expiration_pass_time;
1.1       paf        57: 
                     58: private: // for SQL_Connection
                     59: 
                     60:        /// caches connection
1.6       parser     61:        void close_connection(const String& url, SQL_Connection& connection);
1.1       paf        62: 
                     63: private:
                     64: 
                     65:        Hash driver_cache;
                     66:        Hash connection_cache;
                     67: };
                     68: 
                     69: /// global
                     70: extern SQL_Driver_manager *SQL_driver_manager;
                     71: 
                     72: #endif