Christopher H. Laco > Handel-1.00014 > Handel::Exception

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NAME ^

Handel::Exception - Exceptions used within Handel

SYNOPSIS ^

    use Handel::Cart;
    use Handel::Exception' qw(:try);
    
    try {
        my $cart = Handel::Cart->new('junk crap');
    } catch Handel::Exception::Argument with {
        print 'Passed the wrong arguments to method';
    } catch Handel::Exception with {
        print 'Unknown issue with Handel';
    } catch Error with {
        print 'Unhandled exception';
    } otherwise {
        print 'aliens ate my exception';
    };

DESCRIPTION ^

Handel::Exception subclasses Error and attempts to throw exceptions when unexpected things happen.

EXCEPTIONS ^

Handel::Exception

This is the base exception thrown in Handel. All other exceptions subclass Handel::Exception so it's possible to catch all Handel generated exceptions with a single catch statement.

    try {
        ...
    } catch Handel::Exception with {
        my $E = shift;
        print 'Something bad happened in Handel: ' . E->text;

    } catch MyApplicationException with {
        print 'Something bad happened in MyApplication';

    };

See Error for more information on how to use exceptions.

Handel::Exception::Constraint

This exception is thrown if a database constraint is violated. This is true for both raw DBI database constraint errors as well as field updates that don't pass constraints in Handel::Components::Constraints.

Handel::Exception::Validation

This exception is thrown if the validation performed by Handel::Components::Validation has failed. If the validation component returned a result object, that can be found in $E->results.

Handel::Exception::Storage

This exception is thrown if there are any configuration or setup errors in Handel::Storage.

Handel::Exception::Argument

This exception is thrown when an invalid or unexpected argument value is passed into methods.

Handel::Exception::Taglib

This exception is thrown when an unexpected error occurs within the AxKit taglibs.

METHODS ^

new

This returns a new Handel::Exception object. This is mostly used internally by Error. In most circumstances, you don't need to call new at all. Instead, simply use the throw syntax:

    use Handel::Exceptions;
    
    throw Handel::Exception::Taglib(
        -text => translate("Tag '[_1]' not valid inside of other Handel tags", $tag)
    ) if ($context[$#context] ne 'root');

details

Returns the details portion of the exception message if there are any.

results

Returns the data validation result errors from exceptions thrown by Handel::Components::Validation.

SEE ALSO ^

Error, Handel::Constraints

AUTHOR ^

    Christopher H. Laco
    CPAN ID: CLACO
    claco@chrislaco.com
    http://today.icantfocus.com/blog/
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