MooseX::Singleton - Turn your Moose class into a singleton

       Ricardo SIGNES <rjbs@cpan.org>

       Shawn M Moore <code@sartak.org>

       •   Dave Rolsky <autarch@urth.org>

       •   Karen Etheridge <ether@cpan.org>

       •   Ricardo SIGNES <rjbs@cpan.org>

       •   Kaare Rasmussen <kaare@jasonic.dk>

       •   Anders Nor Berle <berle@cpan.org>

       •   Jonathan Rockway <jon@jrock.us>

       •   Hans Dieter Pearcey <hdp@weftsoar.net>

       This software is copyright (c) 2007 by Shawn M Moore.

       This  is  free  software;  you  can  redistribute  it and/or modify it under the same terms as the Perl 5
       programming language system itself.

perl v5.34.0                                       2022-06-15                             MooseX::Singleton(3pm)

       A singleton is a class that has only one instance in an application.  "MooseX::Singleton" lets you easily
       upgrade (or downgrade, as it were) your Moose class to a singleton.

       All you should need to do to transform your class is to change "use Moose" to "use MooseX::Singleton".
       This module uses metaclass roles to do its magic, so it should cooperate with most other "MooseX"
       modules.

       A singleton class will have the following additional methods:

   Singleton->instance
       This returns the singleton instance for the given package. This method does not accept any arguments. If
       the instance does not yet exist, it is created with its defaults values. This means that if your
       singleton requires arguments, calling "instance" will die if the object has not already been initialized.

   Singleton->initialize(%args)
       This method can be called onlyonceperclass. It explicitly initializes the singleton object with the
       given arguments.

   Singleton->_clear_instance
       This clears the existing singleton instance for the class. Obviously, this is meant for use only inside
       the class itself.

   Singleton->new
       This method currently works like a hybrid of "initialize" and "instance". However, calling "new" directly
       will probably be deprecated in a future release. Instead, call "initialize" or "instance" as appropriate.

       MooseX::Singleton - Turn your Moose class into a singleton

       Anders Nor Berle <debolaz@gmail.com>

       Bugs may be submitted through the RT bug tracker
       <https://rt.cpan.org/Public/Dist/Display.html?Name=MooseX-Singleton> (or bug-MooseX-Singleton@rt.cpan.org
       <mailto:bug-MooseX-Singleton@rt.cpan.org>).

       There is also a mailing list available for users of this distribution, at
       <http://lists.perl.org/list/moose.html>.

       There is also an irc channel available for users of this distribution, at "#moose" on "irc.perl.org"
       <irc://irc.perl.org/#moose>.

           package MyApp;
           use MooseX::Singleton;

           has env => (
               is      => 'rw',
               isa     => 'HashRef[Str]',
               default => sub { \%ENV },
           );

           package main;

           delete MyApp->env->{PATH};
           my $instance = MyApp->instance;
           my $same = MyApp->instance;

       version 0.30