NAME

       Apache::Singleton - Singleton class for mod_perl

VERSION

       version 0.17

SYNOPSIS

         package Printer;
         # default:
         #   Request for mod_perl env
         #   Process for non-mod_perl env
         use base qw(Apache::Singleton);

         package Printer::PerRequest;
         use base qw(Apache::Singleton::Request);

         package Printer::PerProcess;
         use base qw(Apache::Singleton::Process);

DESCRIPTION

       Apache::Singleton works the same as Class::Singleton, but with various object lifetime
       (scope). See Class::Singleton first.

OBJECT LIFETIME

       By inheriting one of the following sublasses of Apache::Singleton, you can change the
       scope of your object.

       Request
             use base qw(Apache::Singleton::Request);

           One instance for one request. Apache::Singleton will remove instance on each request.
           Implemented using mod_perl "pnotes" API. In mod_perl environment (where $ENV{MOD_PERL}
           is defined), this is the default scope, so inheriting from Apache::Singleton would do
           the same effect.

           NOTE: You need "PerlOptions +GlobalRequest" in your apache configuration in order to
           use the Request lifetime method.

       Process
             use base qw(Apache::Singleton::Process);

           One instance for one httpd process. Implemented using package global. In non-mod_perl
           environment, this is the default scope, and you may notice this is the same beaviour
           with Class::Singleton ;)

           So you can use this module safely under non-mod_perl environment.

CREDITS

       Original idea by Matt Sergeant <matt@sergeant.org> and Perrin Harkins <perrin@elem.com>.

       Initial implementation and versions 0.01 to 0.07 by Tatsuhiko Miyagawa
       <miyagawa@bulknews.net>.

SEE ALSO

       Apache::Singleton::Request, Apache::Singleton::Process, Class::Singleton

SOURCE

       The development version is on github at <https://github.com/mschout/apache-singleton> and
       may be cloned from <git://github.com/mschout/apache-singleton.git>

BUGS

       Please report any bugs or feature requests to bug-apache-singleton@rt.cpan.org or through
       the web interface at:
        http://rt.cpan.org/Public/Dist/Display.html?Name=Apache-Singleton

AUTHOR

       Michael Schout <mschout@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2009 by Michael Schout.

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