Tatsuhiko Miyagawa > Apache-Singleton-0.07 > Apache::Singleton

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Module Version: 0.07   Source   Latest Release: Apache-Singleton-0.15

NAME ^

Apache::Singleton - Singleton class for mod_perl

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.

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.

AUTHOR ^

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

Code by Tatsuhiko Miyagawa <miyagawa@bulknews.net>.

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

SEE ALSO ^

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

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