Graham Knop > CHI-0.58 > CHI::Driver::RawMemory

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Module Version: 0.58   Source  

NAME ^

CHI::Driver::RawMemory - In-process memory cache that stores direct references

VERSION ^

version 0.58

SYNOPSIS ^

    use CHI;

    my $hash = {};
    my $cache = CHI->new( driver => 'RawMemory', datastore => $hash );

    my $cache = CHI->new( driver => 'RawMemory', global => 1 );

DESCRIPTION ^

This is a subclass of CHI::Driver::Memory that stores references to data structures directly instead of serializing / deserializing. This makes the cache faster at getting and setting complex data structures, but unlike most drivers, modifications to the original data structure will affect the data structure stored in the cache, and vice versa. e.g.

    my $cache = CHI->new( driver => 'Memory', global => 1 );
    my $lst = ['foo'];
    $cache->set('key' => $lst);   # serializes $lst before storing
    $cache->get('key');   # returns ['foo']
    $lst->[0] = 'bar';
    $cache->get('key');   # returns ['foo']

    my $cache = CHI->new( driver => 'RawMemory', global => 1 );
    my $lst = ['foo'];
    $cache->set('key' => $lst);   # stores $lst directly
    $cache->get('key');   # returns ['foo']
    $lst->[0] = 'bar';
    $cache->get('key');   # returns ['bar']!

CONSTRUCTOR OPTIONS ^

Same as CHI::Driver::Memory.

SIZE AWARENESS ^

For the purpose of size-awareness, all items count as size 1 for this driver. (Because data structures are not serialized, there's no good way to determine their size.)

    # Keep a maximum of 10 items in cache
    #
    my $cache = CHI->new( driver => 'RawMemory', datastore => {}, max_size => 10 );

ACKNOWLEDGMENTS ^

Thanks to Yuval Kogman whose Cache::Ref inspired me to do this.

SEE ALSO ^

CHI::Driver::Memory, CHI

AUTHOR ^

Jonathan Swartz <swartz@pobox.com>

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2012 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.

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