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

1.1       parser      1: /** @file
                      2:        Parser: sql driver manager decl.
                      3: 
                      4:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
                      5:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
                      6: 
1.2     ! parser      7:        $Id: pa_xslt_stylesheet_manager.h,v 1.1 2001/09/14 15:41:59 parser Exp $
1.1       parser      8: 
                      9: 
                     10:        global sql driver manager, must be thread-safe
                     11: */
                     12: 
                     13: #ifndef PA_XSLT_STYLESHEET_MANAGER_H
                     14: #define PA_XSLT_STYLESHEET_MANAGER_H
                     15: 
                     16: #include "pa_config_includes.h"
                     17: #include "pa_pool.h"
                     18: #include "pa_hash.h"
                     19: #include "pa_stack.h"
                     20: #include "pa_table.h"
                     21: 
                     22: 
                     23: // defines
                     24: 
                     25: 
                     26: // forwards
                     27: 
                     28: class Stylesheet_connection;
                     29: 
                     30: /** XSLT stylesheet driver manager
                     31:                maintains 
                     32:                stylesheet cache expiring unused stylesheets
                     33: */
                     34: class XSLT_Stylesheet_manager : public Pooled {
                     35:        friend Stylesheet_connection;
                     36: public:
                     37: 
                     38:        XSLT_Stylesheet_manager(Pool& pool) : Pooled(pool),
                     39:                connection_cache(pool),
                     40:                prev_expiration_pass_time(0) {
                     41:        }
                     42: 
                     43:        /** 
                     44:                check for disk update of "{file_spec}" or "{file_spec}.stamp",
                     45:                if not updated return cached version[if any] otherwise load/compile/return
                     46:        */
                     47:        Stylesheet_connection& get_connection(const String& file_spec);
                     48: 
                     49: private: // stylesheet cache
                     50: 
                     51:        Stylesheet_connection *get_connection_from_cache(const String& file_spec);
                     52:        void put_connection_to_cache(const String& file_spec, Stylesheet_connection& stylesheet);
                     53:        void maybe_expire_connection_cache();
                     54: private:
                     55:        time_t prev_expiration_pass_time;
                     56: 
                     57: private: // for stylesheet
                     58: 
                     59:        /// caches connection
                     60:        void close_connection(const String& file_spec, Stylesheet_connection& stylesheet);
                     61: 
                     62: private:
                     63: 
                     64:        Hash connection_cache;
                     65: };
                     66: 
                     67: /// global
                     68: extern XSLT_Stylesheet_manager *XSLT_stylesheet_manager;
                     69: 
                     70: #endif