Class: Substation::Observer Abstract

Inherits:

Object

Object
Substation::Observer

show all

Includes:: AbstractType, Adamantium::Flat

Defined in:: lib/substation/observer.rb

Overview

This class is abstract.

Abstract observer base class

Direct Known Subclasses

Chain

Defined Under Namespace

Classes: Chain

Constant Summary collapse

NULL = Null observer

Class.new(self) { def call(_response); self; end; }.new.freeze

Class Method Summary collapse

.coerce(input) ⇒ Observer::NULL, ... private

Coerce input to an instance of Observer.

Instance Method Summary collapse

#call ⇒ self private

Notify the observer.

Class Method Details

.coerce(input) ⇒ `Observer::NULL`, ...

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Coerce input to an instance of Substation::Observer

Parameters:

input (NilClass, String, Array<String>) —

0..n observer class names

Returns:

(Observer::NULL, Object, Observer::Chain) —

a null observer, an observer object, or a chain of observers

# File 'lib/substation/observer.rb', line 30

def self.coerce(input)
  case input
  when NilClass
    NULL
  when Array
    Chain.new(input.map { |item| coerce(item) })
  else
    Utils.coerce_callable(input)
  end
end

Instance Method Details

#call ⇒ `self`