Return to pa_sql_driver_manager.h CVS log

Up to [parser3project] / parser3 / src / include

Annotation of parser3/src/include/pa_sql_driver_manager.h, revision 1.10

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: 
                      5:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
                      6: 
                      7:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
                      8: 
1.10    ! parser      9:        $Id: pa_sql_driver_manager.h,v 1.9 2001/09/14 15:41:59 parser Exp $
1.1       paf        10: */
                     11: 
                     12: #ifndef PA_SQL_DRIVER_MANAGER_H
                     13: #define PA_SQL_DRIVER_MANAGER_H
                     14: 
1.4       parser     15: #include "pa_config_includes.h"
1.1       paf        16: #include "pa_pool.h"
                     17: #include "pa_sql_driver.h"
                     18: #include "pa_hash.h"
                     19: #include "pa_stack.h"
                     20: #include "pa_table.h"
                     21: #include "pa_string.h"
1.8       parser     22: 
                     23: 
                     24: // defines
                     25: 
                     26: #define MAIN_SQL_NAME "SQL"
                     27: #define MAIN_SQL_DRIVERS_NAME "drivers"
                     28: 
                     29: // forwards
1.1       paf        30: 
                     31: class SQL_Connection;
                     32: 
1.9       parser     33: /**    sql driver manager
                     34:                maintains 
                     35:                - driver cache  which never expires
                     36:                - connection cache  unused connections got expired
                     37: */
1.1       paf        38: class SQL_Driver_manager : public Pooled {
                     39:        friend SQL_Connection;
                     40: public:
                     41: 
                     42:        SQL_Driver_manager(Pool& pool) : Pooled(pool),
                     43:                driver_cache(pool),
1.7       parser     44:                connection_cache(pool),
                     45:                prev_expiration_pass_time(0) {
1.1       paf        46:        }
                     47: 
                     48:        /** 
                     49:                connect to specified url, 
                     50:                using driver dynamic library found in table, if not loaded yet
                     51:                checks driver version
                     52:        */
1.10    ! parser     53:        SQL_Connection& get_connection(const String& url, const String& request_origin,
        !            54:                Table *protocol2driver_and_client);
1.1       paf        55: 
                     56: private: // driver cache
                     57: 
                     58:        SQL_Driver *get_driver_from_cache(const String& protocol);
                     59:        void put_driver_to_cache(const String& protocol, SQL_Driver& driver);
                     60: 
                     61: private: // connection cache
                     62: 
                     63:        SQL_Connection *get_connection_from_cache(const String& url);
                     64:        void put_connection_to_cache(const String& url, SQL_Connection& connection);
1.7       parser     65:        void maybe_expire_connection_cache();
                     66: private:
                     67:        time_t prev_expiration_pass_time;
1.1       paf        68: 
                     69: private: // for SQL_Connection
                     70: 
                     71:        /// caches connection
1.6       parser     72:        void close_connection(const String& url, SQL_Connection& connection);
1.1       paf        73: 
                     74: private:
                     75: 
                     76:        Hash driver_cache;
                     77:        Hash connection_cache;
                     78: };
                     79: 
                     80: /// global
                     81: extern SQL_Driver_manager *SQL_driver_manager;
                     82: 
                     83: #endif