NAME

Mason::Plugin::Cache - Provide component cache object and filter

VERSION

version 0.05

SYNOPSIS

            

              
              
my $result = $.cache->get('key');
if (!defined($result)) {
    ... compute $result ...
    $.cache->set('key', $result, '5 minutes');
}
...
% $.Cache('key2', '1 hour') {{
  <!-- this will be cached for an hour -->
% }}
            
          

DESCRIPTION

Adds a cache method and Cache filter to access a cache (CHI) object with a namespace unique to the component.

INTERP PARAMETERS

cache_defaults

Hash of parameters passed to cache constructor. Defaults to

            

              
              
driver=>'File', root_dir => 'DATA_DIR/cache'
            
          

which will create a basic file cache under Mason's data directory.

cache_root_class

Class used to create a cache. Defaults to CHI.

COMPONENT CLASS METHODS

cache

Returns a new cache object with the namespace set to the component's path. Parameters to this method, if any, are combined with cache_defaults and passed to the cache_root_class constructor. The cache object is memoized when no parameters are passed.

            

              
              
my $result = $.cache->get('key');
            
          

REQUEST METHODS

cache

Same as calling cache on the current component class. This usage will be familiar to Mason 1 users.

            

              
              
my $result = $m->cache->get('key');
            
          

FILTERS

Cache ($key, $options, [%cache_params])

Caches the content using $self->cache and the supplied cache $key.

$options is a scalar or hash reference. If a scalar, it is treated as the expires_in duration and passed as the third argument to set. If it is a hash reference, it may contain name/value pairs for both get and set.

%cache_params, if any, are passed to $self->cache.

            

              
              
% $.Cache($my_key, '1 hour') {{
  <!-- this will be cached for an hour -->
% }}
% $.Cache($my_key, { expire_if => sub { $.refresh } }, driver => 'RawMemory') {{
  <!-- this will be cached until $.refresh is true -->
% }}
            
          

If neither $key nor $options are passed, the key is set to 'Default' and the cache never expires.

            

              
              
% $.Cache() {{
  <!-- cache this forever, or until explicitly removed -->
% }}
            
          

SUPPORT

The mailing list for Mason and Mason plugins is mason-users@lists.sourceforge.net. You must be subscribed to send a message. To subscribe, visit https://lists.sourceforge.net/lists/listinfo/mason-users.

You can also visit us at #mason on irc://irc.perl.org/#mason.

Bugs and feature requests will be tracked at RT:

            

              
              
http://rt.cpan.org/NoAuth/Bugs.html?Dist=Mason-Plugin-Cache
bug-mason-plugin-cache@rt.cpan.org
            
          

The latest source code can be browsed and fetched at:

            

              
              
http://github.com/jonswar/perl-mason-plugin-cache
git clone git://github.com/jonswar/perl-mason-plugin-cache.git
            
          

SEE ALSO

Mason

AUTHOR

Jonathan Swartz <swartz@pobox.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Jonathan Swartz.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.