NAME

       Data::ObjectDriver::Driver::Cache::Apache - object driver for caching objects in Apache's
       request space

SYNOPSIS

           package MyObject;
           use base qw( Data::ObjectDriver::BaseObject );

           __PACKAGE__->install_properties({
               ...
               driver => Data::ObjectDriver::Driver::Cache::Apache->new(
                   fallback => Data::ObjectDriver::Driver::Cache::Memcached->new(
                       cache    => Cache::Memcached->new({ servers => \@MEMCACHED_SERVERS }),
                       fallback => Data::ObjectDriver::Driver::DBI->new( @$DBI_INFO ),
                   ),
               ),
               ...
           });

           1;

DESCRIPTION

       Data::ObjectDriver::Driver::Cache::Apache provides automatic caching of retrieved objects
       in the per-request memory space of your Apache mod_perl processes, when used in
       conjunction with your actual object driver. It can be used to provide even faster results
       over memcached when requesting objects that have already been requested during the same
       request by some other part of your application, at the cost of the memory necessary to
       store the objects.

       If your models can be used in an Apache mod_perl application as well as another context
       such as a command line shell, consider replacing the Apache layer of your caching with a
       "Data::ObjectDriver::Driver::Cache::RAM" layer when Apache is not available. See
       Data::ObjectDriver::Driver::Cache::Apache.

USAGE

       •   Data::ObjectDriver::Driver::Cache::Apache->new(%params)

           Required members of %params are:

           •   "fallback"

               The "Data::ObjectDriver" object driver from which to request objects that are not
               found in the Apache process cache.

DIAGNOSTICS

       The Apache driver provides integration with the "Data::ObjectDriver" debug and profiling
       systems. As these systems are designed around SQL queries, synthetic queries are logged to
       represent caching operations. The operations generated by this driver are:

       •   "APACHECACHE_GET ?"

           Retrieve an object. The argument is the cache key for the requested object.

       •   "APACHECACHE_ADD ?,?"

           Add an object to the cache. The arguments are the cache key for the object and the
           flattened representation of the object to cache.

       •   "APACHECACHE_SET ?,?"

           Put an object in the cache. The arguments are the cache key for the object and the
           flattened representation of the object to cache.

       •   "APACHECACHE_DELETE ?"

           Remove an object from the cache. The argument is the cache key for the object to
           invalidate.

SEE ALSO

       Apache, Apache2::RequestUtil

LICENSE

       Data::ObjectDriver is free software; you may redistribute it and/or modify it under the
       same terms as Perl itself.

AUTHOR & COPYRIGHT

       Except where otherwise noted, Data::ObjectDriver is Copyright 2005-2006 Six Apart,
       cpan@sixapart.com. All rights reserved.

perl v5.36.0                                2023-02Data::ObjectDriver::Driver::Cache::Apache(3pm)