Functional and object-oriented callback architecture
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Params/CallbackRequest version 1.21

Params::CallbackRequest provides functional and object-oriented callbacks to method and function parameters. Callbacks may be either code references provided to the new() constructor, or methods defined in subclasses of Params::Callback. Callbacks are triggered either for every call to the Params::CallbackRequest execute() method, or by specially named keys in the parameters to execute().

The idea behind this module is to provide a sort of plugin architecture for Perl templating systems. Callbacks are executed by the contents of a request to the Perl templating server, before the templating system itself executes. This approach allows you to carry out logical processing of data submitted from a form, to affect the contents of the request parameters before they're passed to the templating system for processing, and even to redirect or abort the request before the templating system handles it.


To install this module, type the following:

perl Build.PL
./Build test
./Build install

Or, if you don't have Module::Build installed, type the following:

perl Makefile.PL
make test
make install


This module requires these other modules and libraries:

  • Params::Validate 0.59 or later
  • Exception::Class 1.10 or later

The object-oriented callback interface requires Perl 5.6 or later and these other modules and libraries:

  • Attribute::Handlers 0.77 or later
  • Class::ISA

The test suite requires:

  • Test::Simple 0.17 or later

Copyright and License

Copyright 2003-2011 David E. Wheeler. Some Rights Reserved.

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