NAME

       Rose::DB::Registry - Data source registry.

SYNOPSIS

         use Rose::DB::Registry;

         $registry = Rose::DB::Registry->new;

         $registry->add_entry(
           domain   => 'development',
           type     => 'main',
           driver   => 'Pg',
           database => 'dev_db',
           host     => 'localhost',
           username => 'devuser',
           password => 'mysecret',
           server_time_zone => 'UTC');

         $entry = Rose::DB::Registry::Entry->new(
           domain   => 'production',
           type     => 'main',
           driver   => 'Pg',
           database => 'big_db',
           host     => 'dbserver.acme.com',
           username => 'dbadmin',
           password => 'prodsecret',
           server_time_zone => 'UTC');

         $registry->add_entry($entry);

         $entry = $registry->entry(domain => 'development', type => 'main');

         $registry->entry_exists(domain => 'foo', type => 'bar'); # false

         $registry->delete_entry(domain => 'development', type => 'main');

         ...

DESCRIPTION

       Rose::DB::Registry objects manage information about Rose::DB data sources.  Each data source has a
       corresponding Rose::DB::Registry::Entry object that contains its information.  The registry entries are
       organized in a two-level namespace based on a "domain" and a "type."  See the Rose::DB documentation for
       more information on data source domains and types.

       Rose::DB::Registry inherits from, and follows the conventions of, Rose::Object.  See the Rose::Object
       documentation for more information.

CONSTRUCTOR

       new PARAMS
           Constructs a Rose::DB::Registry object based on PARAMS, where PARAMS are name/value pairs.  Any
           object method is a valid parameter name.

OBJECT METHODS

       add_entries ENTRY1 [, ENTRY2, ...]
           Add registry entries.  Each ENTRY must be either a Rose::DB::Registry::Entry-derived object or
           reference to a hash of name/value pairs.  The name/value pairs must be valid arguments for
           Rose::DB::Registry::Entry's constructor.

           Each ENTRY must have a defined domain and type, either in the Rose::DB::Registry::Entry-derived
           object or in the name/value pairs.  A fatal error will occur if these values are not defined.

           If a registry entry for the specified domain and type already exists, then the new entry will
           overwrite it.  If you want to know beforehand whether or not an entry exists under a specific domain
           and type, use the entry_exists method.

           Returns a list (in list context) or reference to an array (in scalar context) of
           Rose::DB::Registry::Entry objects added.

       add_entry ENTRY
           Add a registry entry.  ENTRY must be either a Rose::DB::Registry::Entry-derived object or a list of
           name/value pairs.  The name/value pairs must be valid arguments for Rose::DB::Registry::Entry's
           constructor.

           The ENTRY must have a defined domain and type, either in the Rose::DB::Registry::Entry-derived object
           or in the name/value pairs.  A fatal error will occur if these values are not defined.

           If a registry entry for the specified domain and type already exists, then the new entry will
           overwrite it.  If you want to know beforehand whether or not an entry exists under a specific domain
           and type, use the entry_exists method.

           Returns the Rose::DB::Registry::Entry object added.

       dump
           Returns a reference to a hash containing information about all registered data sources.  The hash is
           structured like this:

               {
                 domain1 =>
                 {
                   type1 =>
                   {
                     # Rose::DB::Registry::Entry attributes
                     # generated by its dump() method
                     driver   => ...,
                     database => ...,
                     host     => ...,
                     ...
                   },

                   type2 =>
                   {
                     ...
                   },
                   ...
                 },

                 domain2 =>
                 {
                   ...
                 },

                 ...
               }

           All the registry entry attribute values are copies, not the actual values.

       delete_domain DOMAIN
           Delete an entire domain, including all the registry entries under that domain.

       delete_entry PARAMS
           Delete the registry entry specified by PARAMS, where PARAMS must be name/value pairs with defined
           values for "domain" and "type".  A fatal error will occur if either one is missing or undefined.

           If the specified entry does not exist, undef is returned.  Otherwise, the deleted entry is returned.

       entry PARAMS
           Get the registry entry specified by PARAMS, where PARAMS must be name/value pairs with defined values
           for "domain" and "type".  A fatal error will occur if either one is missing or undefined.  If the
           specified entry does not exist, undef is returned.

       entry_exists PARAMS
           Returns true if the registry entry specified by PARAMS exists, false otherwise.  PARAMS must be
           name/value pairs with defined values for "domain" and "type".  A fatal error will occur if either one
           is missing or undefined.

       registered_types DOMAIN
           Returns a list (in list context) or reference to an array (in scalar context) of the names of all
           registered types under the domain named DOMAIN.

       registered_domains
           Returns a list (in list context) or reference to an array (in scalar context) of the names of all
           registered domains.

AUTHOR

       John C. Siracusa (siracusa@gmail.com)

LICENSE

       Copyright (c) 2010 by John C. Siracusa.  All rights reserved.  This program is free software; you can
       redistribute it and/or modify it under the same terms as Perl itself.