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App-Stash-0.02
River stage zero No dependents
++
/ App::Stash

NAME

App::Stash - persistent application data storage

SYNOPSIS

    use App::Stash;
    $stash = App::Stash->new({application => "test"});
    $stash->data->{'test'} = 1;
    $stash->d->{'test'} = 1;

after new run:

    use App::Stash;
    $s=App::Stash->new({application => "test"});
    print $s->data->{'test'}, "\n";
    print $s->dao->test, "\n";

WARNING

experimental, use on your own risk :-)

DESCRIPTION

The purpose of the module is to transparently save stash data (structure) across application (script) execution. The save is done in "DESTROY" method. This has certain limitations. Basically make sure you never store object in the "data" as this one may get destroyed before App::Stash object does.

The module+style is inspired by App::Cache. Unlike App::Cache it uses JSON::Util for storage and not Storable. The stash is saved to $HOME/.app-name/stash.json. It is in the "pretty" format so it should be easy to read and edit. I wanted to go with Storable but using it in DESTROY method causes Segmentation fault on my Perl.

Warn: no file locking in place, use Proc::PID::File or similar to have just one instance of program running or send a wish list bug report and wait for implementation of stash file locking. :)

PROPERTIES

    application
    directory
    stash_filename

See "new" in App::Cache for a description of application and directory. stash_filename is the full path to the file where stash data will be stored. All three are optional.

METHODS

new()

Object constructor.

d

Shortcut for "data".

data

Returns reference to the stash data.

dao()

Returns "data" passed to "dao" in Data::AsObject. So basically the data structure becomes an object. See Data::AsObject for details.

Note: Data::AsObject is not compile time dependency. It will be used if installed. If not the exception will be thrown only when calling "dao". So if you plan to use it, make it a dependency of your module/program.

clear

Will delete stash data and remove the file with the stash data from the disk.

load

Load stash data from disk. Called automatically by first call to "data". Can be used to revert current stash data to the state before current execution.

save

Save stash data to disk - $HOME/.app-name/stash.json. Called automatically via DESTROY method when App::Stash object is going to be destroyed.

Will throw an exception if the file save fails.

DESTROY

Calls "save" and prints warning if it fails.

SEE ALSO

App::Cache

AUTHOR

Jozef Kutej, <jkutej at cpan.org>

BUGS

Please report any bugs or feature requests to bug-app-stash at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=App-Stash. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc App::Stash

You can also look for information at:

ACKNOWLEDGEMENTS

COPYRIGHT & LICENSE

Copyright 2009 Jozef Kutej.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.