NAME

IOC::Registry - Registry singleton for the IOC Framework

SYNOPSIS

  use IOC::Registry;

  my $container = IOC::Container->new('database');
  my $other_container = IOC::Container->new('logging');
  # ... bunch of IOC::Container creation code omitted
  
  # create a registry singleton
  my $reg = IOC::Registry->new();
  $reg->registerContainer($container);
  $reg->registerContainer($other_container);
  
  # ... somewhere later in your program
  
  my $reg = IOC::Registry->instance(); # get the singleton
  
  # and try and find a service
  my $service = $reg->searchForService('laundry') || die "Could not find the laundry service";
  
  my $database = $reg->getRegisteredContainer('database');
  
  # get a list of container names
  my @container_names = $reg->getRegisteredContainerList();
  
  # and you can unregister containers too
  my $unregistered_container = $reg->unregisterContainer($container);

DESCRIPTION

This is a singleton object which is meant to be used as a global registry for all your IoC needs.

METHODS

new: Creates a new singleton instance of the Registry, the same singleton will be returned each time "new" is called after the first one.

Container Registration Methods

registerContainer ($container): This method will add a $container to the registry, where it can be accessed by it's name.
unregisterContainer ($container|$name): This method accepts either the $container instance itself, or the $name of the container and removes said container from the registry.
hasRegisteredContainer ($name): This will return true (1) if a container by that $name exists within the registry, and false (0) otherwise.
getRegisteredContainer ($name): This will retrieve a registered container by $name from the registry. If $name is not defined, then an IOC::InsufficientArguments exception will be thrown. If no container is found with $name, then an IOC::ContainerNotFound exception will be thrown.
getRegisteredContainerList: This will return the list of string names of all the registered containers.

Aliasing Methods

aliasService ($real_path, $alias_path)

This allows you to alias a path to a real service ($real_path) to be accessible from a different path ($alias_path). Basically, it is sometimes useful for the same service to be found at two different paths, especially when re-useing and combining IOC configurations for different frameworks.

The aliases set by this method will only affect the services retrieved through the "locateService" method. The aliases do not have any meaning outside of the IOC::Registry.

NOTE: There is no easy way to validate that the $real_path is actually a valid path, so we make the assumption that you know what you are doing.

Search Methods

locateService ($path): Given a $path to a service, this will locate the service and return it. If $path is not specificed an IOC::InsufficientArguments exception will be thrown.
searchForService ($name): Given a $name for a service, this will attempt to locate the service within the entire heirarchy and return it. If the service is not found, then this method will return "undef". If $name is not specificed an IOC::InsufficientArguments exception will be thrown.
locateContainer ($path): Given a $path to a container, this will locate the container and return it. If $path is not specificed an IOC::InsufficientArguments exception will be thrown.
searchForContainer ($name): Given a $name for a container, this will attempt to locate the container within the entire heirarchy and return it. If the container is not found, then this method will return "undef". If $name is not specificed an IOC::InsufficientArguments exception will be thrown.

TO DO

Work on the documentation

BUGS

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

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

AUTHOR

stevan little, <stevan@iinteractive.com>

COPYRIGHT AND LICENSE

<http://www.iinteractive.com>

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