Return to pa_db_connection.h CVS log

Up to [parser3project] / parser3 / src / include

Annotation of parser3/src/include/pa_db_connection.h, revision 1.9

1.1       parser      1: /** @file
1.9     ! paf         2:        Parser: sql driver connection decl.
        !             3:        global sql driver connection, must be thread-safe
1.1       parser      4: 
                      5:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
                      6:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
                      7: 
1.9     ! paf         8:        $Id: pa_db_connection.h,v 1.2 2001/10/23 12:41:05 parser Exp $
1.1       parser      9: */
                     10: 
                     11: #ifndef PA_DB_CONNECTION_H
                     12: #define PA_DB_CONNECTION_H
                     13: 
                     14: #include "pa_config_includes.h"
                     15: #include "pa_pool.h"
1.9     ! paf        16: #include "pa_hash.h"
1.1       parser     17: #include "pa_db_manager.h"
                     18: 
                     19: #ifdef HAVE_DB_H
                     20: #      include <db.h>
                     21: #endif
                     22: 
                     23: // defines
                     24: 
1.2       parser     25: // forwards
                     26: 
1.9     ! paf        27: class DB_Table;
1.1       parser     28: 
1.9     ! paf        29: /// sql driver connection
1.1       parser     30: class DB_Connection : public Pooled {
1.9     ! paf        31:        friend DB_Table;
1.1       parser     32: public:
                     33: 
1.9     ! paf        34:        DB_Connection(Pool& pool, const String& db_home);
1.1       parser     35: 
                     36:        void set_services(Pool *aservices_pool) {
                     37:                time_used=time(0); // they started to use at this time
                     38:                fservices_pool=aservices_pool;
                     39:        }
                     40:        bool expired(time_t older_dies) {
                     41:                return time_used<older_dies;
                     42:        }
                     43: 
                     44:        void close() {
1.9     ! paf        45:                DB_manager->close_connection(fdb_home, *this);
1.1       parser     46:        }
1.9     ! paf        47:        bool connected() { return fconnected; }
1.1       parser     48:        void connect();
1.2       parser     49:        void disconnect();      
1.9     ! paf        50:        bool ping() { return errors==0; }
1.1       parser     51: 
1.9     ! paf        52:        /**
        !            53:                connect to specified file_name, 
        !            54:                using driver dynamic library found in table, if not loaded yet
        !            55:                checks driver version
        !            56:        */
        !            57:        DB_Table& get_table(const String& file_name, const String& request_origin);
        !            58:        void clear_dbfile(const String& file_name);
        !            59: 
        !            60: private: // table cache
        !            61: 
        !            62:        DB_Table *get_table_from_cache(const String& file_name);
        !            63:        void put_table_to_cache(const String& file_name, DB_Table& table);
        !            64:        void maybe_expire_table_cache();
1.1       parser     65: private:
1.9     ! paf        66:        time_t prev_expiration_pass_time;
1.1       parser     67: 
1.9     ! paf        68: private: // for DB_Table
1.1       parser     69: 
1.9     ! paf        70:        /// caches table
        !            71:        void close_table(const String& file_name, DB_Table& table);
1.2       parser     72: 
1.9     ! paf        73: private:
1.2       parser     74: 
1.9     ! paf        75:        time_t time_used;
        !            76:        Pool *fservices_pool;
1.2       parser     77: 
1.9     ! paf        78:        const String& fdb_home;
        !            79:        bool fconnected;
        !            80:        DB_ENV dbenv;
        !            81:        int errors;
        !            82:        Hash table_cache;
1.2       parser     83: 
1.1       parser     84: private:
                     85: 
                     86:        void check(const char *operation, const String *source, int error);
                     87: };
                     88: 
                     89: #endif