Module: Kamaze::Project::Concern::Observable::ClassMethods

Defined in:
lib/kamaze/project/concern/observable.rb

Overview

Class methods

Instance Method Summary collapse

Instance Method Details

#add_observer(observer_class, func = :handle_event) ⇒ self

Add observer.

Parameters:

  • observer_class (Class)

Returns:

  • (self) 


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# File 'lib/kamaze/project/concern/observable.rb', line 58

def add_observer(observer_class, func = :handle_event)
  func = func.to_sym

  unless observer_class.instance_methods.include?(func)
    m = "#<#{observer_class}> does not respond to `#{func}'"
    raise NoMethodError, m
  end

  observer_peers[observer_class] = func

  self
end

#delete_observer(observer_class) ⇒ self

Remove observer, so that it will no longer receive notifications.

Parameters:

  • observer_class (Class)

Returns:

  • (self) 


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# File 'lib/kamaze/project/concern/observable.rb', line 75

def delete_observer(observer_class)
  observer_peers.delete(observer_class)

  return self
end

#delete_observers ⇒ self

Remove all observers.

Returns:

  • (self) 


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# File 'lib/kamaze/project/concern/observable.rb', line 84

def delete_observers
  observers.clear

  self
end

#observer_peers ⇒ Hash (protected)

Returns:

  • (Hash) 


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# File 'lib/kamaze/project/concern/observable.rb', line 93

def observer_peers
  @observer_peers ||= {}
end