NAME

Gantry::Exceptions - Structured exceptions for Gantry

SYNOPSIS

This module defines structured exceptions for Gantry.

DESCRIPTION

This module extends Exception::Class and defines a base set of exceptions for Gantry. You can extend this class with your own exceptions. When you do this, you will need to write an exception handler named exception_handler(). This method will recieve one parameter, which is the thrown exception. If an handler is not defined. A HTTP 500 error will be generated.

Gantry::Exception

This can be used to generate exceptions within your application. An exception can take the following parametrs:

status      - a numeric status code
status_line - a text line to be placed in a log file
message     - text to be sent to the browser
dump        - a dump of whatever

You will also need to write a custom exception handler. For example, say you want to generate a 402 exception. You would do the following:

...

Gantry::Exception->throw(
    status => 402,
    status_line => 'payment required',
    message => 'gimme all your money, and your luvin too...'
);

...

sub exception_handler {
    my ($self, $X) = @_;

    my $status = $X->status;

    if ($status == 402) {

        # do something useful

   }

   return $status;

}

Gantry::Exception::Redirect

You can use this to force a HTTP "Found" (302) to the browser. As an alternative you can use the relocate() method for existing code.

Example:

Gantry::Exception::Redirect->throw('/login');

$self->relocate('/login');

Gantry::Exception::RedirectPermanently

You can use this to force a HTTP "Moved Permanently" (301) to the browser. As an alternative you can use the relocate_permanently() method for existing code.

Example:

Gantry::Exception::RedirectPermanently->throw('/somewhere');

$self->relocate_permanently('/somewhere');

Gantry::Exception::Declined

Primiarily used internally by Gantry. It will produce a status page when a url is not defined within your controllers.

SEE ALSO

Gantry
Gantry::State::Exceptions
Exception::Class

AUTHOR

Kevin L. Esteb <kesteb@wsipc.org>

COPYRIGHT AND LICENSE

Copyright (C) 2008 Kevin L. Esteb

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.