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Class: ActionDispatch::Callbacks

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::DescendantsTracker
Instance Chain:
self, ::ActiveSupport::Callbacks
Inherits: Object
Defined in: actionpack/lib/action_dispatch/middleware/callbacks.rb

Overview

Provides callbacks to be executed before and after dispatching the request.

Constant Summary

::ActiveSupport::Callbacks - Included

CALLBACK_FILTER_TYPES

::ActiveSupport::Callbacks - Attributes & Methods

Class Method Summary

::ActiveSupport::DescendantsTracker - self

clear, descendants, direct_descendants,
store_inherited

This is the only method that is not thread safe, but is only ever called during the eager loading phase.
subclasses

Alias for ActiveSupport::DescendantsTracker.direct_descendants.

Instance Method Summary

::ActiveSupport::Callbacks - Included

#run_callbacks

Runs the callbacks for the given event.

Constructor Details

.new(app) ⇒ Callbacks

[ GitHub ] 

  


# File 'actionpack/lib/action_dispatch/middleware/callbacks.rb', line 20



def initialize(app)
  @app = app
end


  







Class Attribute Details



  

    .__callbacks   (rw)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 67



class_attribute :__callbacks, instance_writer: false, default: {}


  








  

    .__callbacks?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 67



class_attribute :__callbacks, instance_writer: false, default: {}


  







Class Method Details



  

    .after(*args, &block)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/callbacks.rb', line 15



def after(*args, &block)
  set_callback(:call, :after, *args, &block)
end


  








  

    .before(*args, &block)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/callbacks.rb', line 11



def before(*args, &block)
  set_callback(:call, :before, *args, &block)
end


  







Instance Attribute Details



  

    #__callbacks   (readonly)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 67



class_attribute :__callbacks, instance_writer: false, default: {}


  








  

    #__callbacks?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/callbacks.rb', line 67



class_attribute :__callbacks, instance_writer: false, default: {}


  







Instance Method Details



  

    #call(env)  
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/middleware/callbacks.rb', line 24



def call(env)
  error = nil
  result = run_callbacks :call do
    @app.call(env)
  rescue => error
  end
  raise error if error
  result
end