MooseX::AutoDestruct - Clear your attributes after a certain time
version 0.009
package Foo;
use Moose;
use namespace::autoclean;
use MooseX::AutoDestruct;
has foo => (
traits => [ AutoDestruct ],
is => 'ro',
isa => 'Str',
lazy_build => 1,
ttl => 600, # time, in seconds
);
sub _build_foo { --some expensive operation-- }MooseX::AutoDestruct is an attribute metaclass trait that causes your attribute value to be cleared after a certain time from when the value has been set.
This trait will work regardless of how the value is populated or if a clearer method has been installed; or if the value is accessed via the installed accessors or by accessing the attribute metaclass itself.
No traits are automatically applied to any metaclasses; however, on use'ing this package an 'AutoDestruct' attribute trait becomes available.
Moose will properly deduce what trait you're talking about if you pass AutoDestruct as a string -- e.g.:
has foo => (traits => [ 'AutoDestruct' ], ...)However, this is depreciated in favor of the exported trait alias:
has foo => (traits => [ AutoDestruct ], ...)Apply the AutoDestruct trait to your attribute metaclass (e.g. "traits => [AutoDestruct]") and supply a ttl value.
Typical usage of this could be for an attribute to store a value that is expensive to calculate, and can be counted on to be valid for a certain amount of time (e.g. caching). Builders are your friends :)
Please report any bugs or feature requests to bug-moosex-autodestruct at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=MooseX-AutoDestruct.
Chris Weyl <cweyl@alumni.drew.edu>
This software is Copyright (c) 2011 by Chris Weyl.
This is free software, licensed under:
The GNU Lesser General Public License, Version 2.1, February 1999