Module: PDC::Resource

Defined in:: lib/pdc/resource/per_thread_registry.rb,
lib/pdc/resource/path.rb,
lib/pdc/resource/scopes.rb,
lib/pdc/resource/identity.rb,
lib/pdc/resource/relation.rb,
lib/pdc/resource/rest_api.rb,
lib/pdc/resource/attributes.rb,
lib/pdc/resource/value_parser.rb,
lib/pdc/resource/relation/query.rb,
lib/pdc/resource/scope_registry.rb,
lib/pdc/resource/attribute_store.rb,
lib/pdc/resource/relation/finder.rb,
lib/pdc/resource/attribute_modifier.rb,
lib/pdc/resource/relation/pagination.rb

Overview

This module is used to encapsulate access to thread local variables.

Instead of polluting the thread locals namespace:

Thread.current[:connection_handler]

you define a class that extends this module:

module ActiveRecord
  class RuntimeRegistry
    extend ActiveSupport::PerThreadRegistry

    attr_accessor :connection_handler
  end
end

and invoke the declared instance accessors as class methods. So

ActiveRecord::RuntimeRegistry.connection_handler = connection_handler

sets a connection handler local to the current thread, and

ActiveRecord::RuntimeRegistry.connection_handler

returns a connection handler local to the current thread.

This feature is accomplished by instantiating the class and storing the instance as a thread local keyed by the class name. In the example above a key “ActiveRecord::RuntimeRegistry” is stored in Thread.current. The class methods proxy to said thread local instance.

If the class has an initializer, it must accept no arguments.

Defined Under Namespace

Modules: AttributeModifier, Attributes, Finder, Identity, Pagination, PerThreadRegistry, Query, RestApi, Scopes Classes: AttributeStore, Path, Relation, ScopeRegistry, ValueParser

Constant Summary collapse

PAGINATION =

:pagination

PAGINATION_KEYS =

[
  :resource_count,
  :previous_page,
  :next_page
].freeze