moox-failover's Introduction

NAME

MooX::Failover - Instantiate Moo classes with failover

VERSION

v0.3.4

SYNOPSIS

# In your class:

package MyClass;

use Moo;
use MooX::Failover;

has 'attr' => ( ... );

# after attributes are defined:

failover_to 'OtherClass';

...

# When using the class

my $obj = MyClass->new( %args );

# If %args contains missing or invalid values or new otherwise
# fails, then $obj will be of type "OtherClass".

INSTALLATION

See How to install CPAN modules.

Required Modules

This distribution requires Perl v5.10.1.

This distribution requires the following modules:

This distribution recommends the following modules:

Class::Load::XS

RECENT CHANGES

Documentation

Fixed typos in Changes file (v0.3.3 was broken up into two sections).

See the Changes file for a longer revision history.

DESCRIPTION

This module provides constructor failover for Moo classes.

For example, if a class cannot be instantiated because of invalid arguments (perhaps from an untrusted source), then instead it returns the failover class (passing the same arguments to that class).

It is roughly equivalent to using

my $obj = eval { MyClass->new(%args) //
   OtherClass->new( %args, error => $@ );

This allows for cleaner design, by not forcing you to duplicate type checking for constructor parameters.

See the module documentation for MooX::Failover for more information.

AUTHOR

Robert Rothenberg <[email protected]>

Acknowledgements

Thermeon.
Piers Cawley.
Gareth Kirwan.

COPYRIGHT

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

This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

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moox-failover's Issues

MooX::Failover is signficantly slower than using an eval block

Rudimentary benchmarks show it is 15-30% slower than using something like

$obj = eval { MyClass->new(%args) } // Failover->new(%args)

This makes it useless where performance counts.

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