NAME

       Bread::Board::Service::WithParameters - Services with parameters

VERSION

       version 0.37

DESCRIPTION

       This is a sub-role of Bread::Board::Service, for parameterized services. These are
       services that will instantiate different values depending on parameters that are passed to
       the "get" method. You can pass those parameters via the "service_params" attribute of
       "Bread::Board::Dependency", or via the "inflate" method of
       "Bread::Board::Service::Deferred::Thunk".

ATTRIBUTES

   "parameters"
       Read-only hashref, will be passed as-is to "MooseX::Params::Validate"'s "validated_hash",
       so you can use things like "optional" and "default" in addition to type constraints:

         service something => (
           class => 'Thing',
           parameters => {
              type => { isa => 'Str', default => 'text' },
           },
         );

       This attribute uses coercions on "Bread::Board::Service::Parameters" so that you can also
       say:

         service something => (
           class => 'Thing',
           parameters => ['type'],
         );

       and it will be equivalent to:

         service something => (
           class => 'Thing',
           parameters => {
              type => { optional => 0 },
           },
         );

METHODS

   "has_parameters"
       Predicate for the "parameters" attribute.

   "has_parameter_defaults"
       Returns true if any of the "parameters" have a "default" value.

   "has_required_parameters"
       Returns true if any of the "parameters" does not have "optional" set to true.

   "check_parameters"
         my %parameters = $service->check_parameters(name1=>$value1,name2=>$value2);
         my %parameters = $service->check_parameters({name1=>$value1,name2=>$value2});

       If any "parameters" are defined, this function validates its arguments against the
       parameters' definitions (using MooseX::Params::Validate). It will die if the validation
       fails, or return the validated parameters (including default value) if it succeeds.

   "get"
       Before the "get" method, arguments to "get" are passed through "check_parameters" and
       added to the "params" hashref. After the "get" method, those keys/values will be removed.
       In practice, this makes all parameters available to the actual "get" method body.

AUTHOR

       Stevan Little <stevan@iinteractive.com>

BUGS

       Please report any bugs or feature requests on the bugtracker website
       https://github.com/stevan/BreadBoard/issues

       When submitting a bug or request, please include a test-file or a patch to an existing
       test-file that illustrates the bug or desired feature.

COPYRIGHT AND LICENSE

       This software is copyright (c) 2019, 2017, 2016, 2015, 2014, 2013, 2011, 2009 by Infinity
       Interactive.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.