Update for review per maurogeorge feedback

README.md

@@ -381,6 +381,10 @@ All serializable resources must pass the ActiveModel::Serializer::Lint::Tests.
 See the ActiveModelSerializers::Model for a base class that implements the full
 API for a plain-old Ruby object (PORO).
 
+## Hooks
+
+To run a hook when ActiveModelSerializers is loaded, use `ActiveSupport.on_load(:active_model_serializers) do end`
+
 ## Getting Help
 
 If you find a bug, please report an [Issue](https://github.com/rails-api/active_model_serializers/issues/new).

docs/general/instrumentation.md

@@ -1,7 +1,8 @@
 # Instrumentation
 
-ActiveModelSerializers uses the ActiveSupport::Notification API, which
-allows for subscribing to events, such as for logging.
+ActiveModelSerializers uses the
+[ActiveSupport::Notification API](http://guides.rubyonrails.org/active_support_instrumentation.html#subscribing-to-an-event),
+which allows for subscribing to events, such as for logging.
 
 ## Events
 
@@ -17,3 +18,20 @@ Payload (example):
   adapter: ActiveModel::Serializer::Adapter::Attributes
 }
 ```
+
+Subscribing:
+
+```ruby
+ActiveSupport::Notifications.subscribe 'render.active_model_serializers' do |name, started, finished, unique_id, data|
+  # whatever
+end
+ActiveSupport::Notifications.subscribe 'render.active_model_serializers' do |*args|
+  event = ActiveSupport::Notifications::Event.new(*args)
+  # event.payload
+  # whatever
+end
+
+## [LogSubscriber](http://api.rubyonrails.org/classes/ActiveSupport/LogSubscriber.html)
+
+ActiveModelSerializers includes an `ActiveModelSerializers::LogSubscriber` that attaches to
+`render.active_model_serializers`.

lib/action_controller/serialization.rb

@@ -31,6 +31,9 @@ module ActionController
         serializable_resource.serialization_scope ||= serialization_scope
         serializable_resource.serialization_scope_name = _serialization_scope
         begin
+          # Necessary to ensure we have an adapter for the serializable resource
+          # after it has been figured.
+          # TODO: This logic should be less opaque and probably moved into the SerializableResource.
           serializable_resource.tap(&:adapter)
         rescue ActiveModel::Serializer::CollectionSerializer::NoSerializerError
           resource

lib/active_model_serializers.rb

@@ -1,7 +1,5 @@
 require 'active_model'
 require 'active_support'
-require 'active_support/tagged_logging'
-require 'active_support/logger'
 require 'action_controller'
 require 'action_controller/railtie'
 module ActiveModelSerializers

lib/active_model_serializers/logging.rb

@@ -3,12 +3,13 @@
 #
 #   https://github.com/rails/rails/blob/280654ef88/activejob/lib/active_job/logging.rb
 #
-module ActiveModelSerializers::Logging
+module ActiveModelSerializers
+  module Logging
     extend ActiveSupport::Concern
 
     included do
       include ActiveModelSerializers::Callbacks
-    extend NotificationMacro
+      extend Macros
       instrument_rendering
     end
 
@@ -24,8 +25,12 @@ module ActiveModelSerializers::Logging
       end
     end
 
+    # Macros that can be used to customize the logging of class or instance methods,
+    # by extending the class or its singleton.
+    #
     # Adapted from:
     #   https://github.com/rubygems/rubygems/blob/cb28f5e991/lib/rubygems/deprecate.rb
+    #
     # Provides a single method +notify+ to be used to declare when
     # something a method notifies, with the argument +callback_name+ of the notification callback.
     #
@@ -38,15 +43,15 @@ module ActiveModelSerializers::Logging
     #         # ...
     #       end
     #
-  #       include ActiveModelSerializers::Logging
+    #       include ActiveModelSerializers::Logging::Macros
     #       notify :instance_method, :render
     #
     #       class << self
-  #         extend ActiveModelSerializers::Logging::NotificationMacro
+    #         extend ActiveModelSerializers::Logging::Macros
     #         notify :klass_method, :render
     #       end
     #     end
-  module NotificationMacro
+    module Macros
       ##
       # Simple notify method that wraps up +name+
       # in a dummy method. It notifies on with the +callback_name+ notifier on
@@ -107,6 +112,7 @@ module ActiveModelSerializers::Logging
         ActiveModelSerializers.logger
       end
     end
+  end
 end
 
 ActiveModelSerializers::Logging::LogSubscriber.attach_to :active_model_serializers