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Catalyst::Plugin::Session::Store::FastMmap
FastMmap session storage backend.

Catalyst::Plugin::Session::Store::FastMmap - FastMmap session storage backend.


NAME

Catalyst::Plugin::Session::Store::FastMmap - FastMmap session storage backend.


SYNOPSIS


    use Catalyst qw/Session Session::Store::FastMmap Session::State::Foo/;

    

    MyApp->config->{session} = {

        expires => 3600,

        storage => '/tmp/session'

    };

    # ... in an action:

    $c->session->{foo} = 'bar'; # will be saved


DESCRIPTION

Catalyst::Plugin::Session::Store::FastMmap is a fast session storage plugin for Catalyst that uses an mmap'ed file to act as a shared memory interprocess cache. It is based on the Cache::FastMmap manpage.

METHODS

get_session_data
store_session_data
delete_session_data
delete_expired_sessions
These are implementations of the required methods for a store. See the Catalyst::Plugin::Session::Store manpage.

get_and_set_session_data
This is the optional method for atomic write semantics. See the Catalyst::Plugin::Session::AtomicWrite manpage.

setup_session
Sets up the session cache file.


CAVEATS

Very loaded sites with lots of data in the session hash may have old sessions expired prematurely, due to the LRU caching policy employed by the Cache::FastMmap manpage. To get around this you can increase the cache_size parameter, or switch session storage backends.

This is particularly inappropriate for use as a backend for e.g. the Catalyst::Plugin::Session::PerUser manpage, for example.

the Cache::FastMmap manpage defaults to around 5mb (89 * 64k).


CONFIGURATION

These parameters are placed in the hash under the session key in the configuration hash.

storage
Specifies the file to be used for the sharing of session data. The default value will use the File::Spec manpage to find the default tempdir, and use a file named MyApp_session_data, where MyApp is replaced with the appname.

Note that the file will be created with mode 0640, which means that it will only be writeable by processes running with the same uid as the process that creates the file. If this may be a problem, for example if you may try to debug the program as one user and run it as another, specify a filename like /tmp/session-$>, which includes the UID of the process in the filename.

init_file
cache_size
See the the Cache::FastMmap manpage documentation for the meaning of these keys. If these keys are not present the Cache::FastMmap manpage's defaults will be used.


SEE ALSO

Catalyst, the Catalyst::Plugin::Session manpage, the Cache::FastMmap manpage.


AUTHORS

This module is derived from the Catalyst::Plugin::Session::FastMmap manpage code, and has been heavily modified since.

Andrew Ford Andy Grundman Christian Hansen Yuval Kogman, nothingmuch@woobling.org Marcus Ramberg Sebastian Riedel


COPYRIGHT

This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

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