The Perl Advent Calendar needs more articles for 2022. Submit your idea today!

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.