/ 
Catalyst-Plugin-Session-Store-FastMmap-0.08
River stage two • 12 direct dependents • 13 total dependents
/ Catalyst::Plugin::Session::Store::FastMmap

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 Cache::FastMmap.

METHODS

get_session_data
store_session_data
delete_session_data
delete_expired_sessions

These are implementations of the required methods for a store. See Catalyst::Plugin::Session::Store.

get_and_set_session_data

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

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 Cache::FastMmap. 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. Catalyst::Plugin::Session::PerUser, for example.

Cache::FastMmap 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 File::Spec 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 Cache::FastMmap documentation for the meaning of these keys. If these keys are not present Cache::FastMmap's defaults will be used.

SEE ALSO

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

AUTHORS

This module is derived from Catalyst::Plugin::Session::FastMmap 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.