IOC::Service::Prototype - An IOC Service object which returns a prototype instance


IOC documentation Contained in the IOC distribution.

Index


Code Index:

NAME

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IOC::Service::Prototype - An IOC Service object which returns a prototype instance

SYNOPSIS

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  use IOC::Service::Prototype;

DESCRIPTION

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This class essentially can be used just like IOC::Service, the only difference is that it will return a new instance of the component each time rather than a singleton instance.

        +--------------+
        | IOC::Service |
        +--------------+
               |
               ^
               |
   +-------------------------+
   | IOC::Service::Prototype |
   +-------------------------+

A Note about Lifecycles

One important distinction to make about this lifecycle as opposed to the singleton lifecycle is that we do not make any references to the component within the service, so you have total control over the scope of your component. This means that once the prototypical component you retrieved from a IOC::Service::Prototype container goes out of scope, it's DESTROY method will be called (assuming all it's own references have been cleaned up).

METHODS

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instance

This is the only method this subclass overrides. It changes this behavior to return a new instance of the component each time, as opposed to the normal Singleton instance.

TO DO

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Work on the documentation

BUGS

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None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it.

CODE COVERAGE

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I use Devel::Cover to test the code coverage of my tests, see the CODE COVERAGE section of IOC for more information.

SEE ALSO

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Prototype-style components are supported by the Spring Framework.

http://www.springframework.com

AUTHOR

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stevan little, <stevan@iinteractive.com>

COPYRIGHT AND LICENSE

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IOC documentation Contained in the IOC distribution.

package IOC::Service::Prototype;

use strict;
use warnings;

our $VERSION = '0.02';

use IOC::Exceptions;

use base 'IOC::Service';

sub instance {
    my ($self) = @_;
    (defined($self->{container}))
        || throw IOC::IllegalOperation "Cannot create a service instance without setting container";    
    # we need to be sure to not store this value
    # otherwise we will add a ref count to it 
    return $self->{block}->($self->{container});
}

1;

__END__