1, migrate to rails3 style gem and generator

.rvmrc

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+rvm use ruby-1.9.3-p362@event_machine

lib/event_machine/engine.rb

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+module EventMachine
+  class Engine < Rails::Engine
+
+    initializer "event_machine.load_app_instance_data" do |app|
+      EventMachine.setup do |config|
+        config.app_root = app.root
+      end
+    end
+
+    #initialize "event_machine.load_static_assets" do |app| 
+    #  app.middleware.use ::ActionDispatc::Static, "#{root}/public"
+    #end
+
+    initializer "event_machine.application" do
+      ActiveSupport.on_load :action_controller do
+        include EventMachine::Hooks
+      end
+    end
+
+  end
+end

lib/event_machine/hooks.rb

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+require "pp"
+require 'benchmark'
+
+module EventMachine 
+
+  module Hooks
+
+    EVENTS_DIR = "app/events"
+
+    def self.included(base)
+      class_eval <<-EOF 
+        @@reporter_events = Array.new
+      EOF
+      base.class_eval <<-BCE 
+        around_filter :reporter_around_filter
+      BCE
+    end
+
+    protected
+
+    def reporter_around_filter
+
+      events_load_bm = Benchmark.measure do
+        load_events if @@reporter_events.empty?
+      end
+
+      events = @@reporter_events.select {|e| e.match_event?(self.class, action_name)}
+
+      # Calling all before actions for this controler and action
+      events.each { |event| event.call_before(self) }
+
+      # Calling original action
+      yield
+
+      # Calling all after actions for this controler and action
+      events.each { |event| event.call_after(self) }
+    end
+
+    def for_action(controller, action, &block)
+      @@reporter_events << EventMeta.new(controller, action, &block)
+    end
+
+    def for_actions(actions_array, &block)
+      actions_array.each do |item|
+        @@reporter_events << EventMeta.new(item[0], item[1], &block)
+      end
+    end
+
+    def turn_off_for_action(controller, action, &block)
+      for_action(controller, action, &block) if test?
+    end
+
+    def load_events
+      return if test?
+      Dir["#{Rails.root + EVENTS_DIR}/**/*event.rb"].collect do |file|
+        load_event(file)
+      end
+    end
+
+    def load_event(file)
+      clear_events if test?
+      code = File.new(file).readlines.join('')
+      begin
+        instance_eval code, __FILE__, __LINE__
+      rescue => e
+        logger.warn "FAILED!"
+        logger.warn e.backtrace
+      end
+    end
+
+    def clear_events
+      @@reporter_events.clear
+    end
+
+    def reporter_events
+      @@reporter_events
+    end
+
+    def test?
+      ENV["RAILS_ENV"] == "test"
+    end
+
+    class EventMeta
+
+      def initialize(controller_class, name, &block)
+        @controller_class = controller_class
+        @action = name
+        self.instance_eval(&block)
+      end
+
+      def call_before(controller_instance)
+        controller_instance.instance_eval(&@before) if @before
+      end
+
+      def call_after(controller_instance)
+        controller_instance.instance_eval(&@after) if @after
+      end
+
+      def match_event?(clazz, action_name)
+        @controller_class == clazz && @action.to_s == action_name.to_s
+      end
+      private
+
+      def before(&block)
+        @before = block
+      end
+
+      def after(&block)
+        @after = block
+      end
+
+    end
+
+  end
+
+end

lib/event_machine/version.rb

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+module EventMachine
+  VERSION = "0.4.0"
+end

lib/generators/event_machine/event_machine_generator.rb

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+require 'rails/generators'
+class EventMachineGenerator < Rails::Generators::Base
+  source_root File.expand_path('../templates', __FILE__)
+
+  argument :this_event_name, :type => :string
+  argument :controller_name, :type => :string
+  argument :action_name,     :type => :string
+
+  def generate_event
+    template "event.rb", "app/events/#{parsed_event_name}_event.rb"
+    template "functional_test.rb", "test/functional/events/#{parsed_event_name}_test.rb"
+  end
+
+  private
+
+  def parsed_event_name
+    this_event_name.underscore
+  end
+
+  def parsed_controller_name
+    controller_name.camelize
+  end
+
+  def parsed_action_name 
+    action_name.underscore
+  end
+
+end

lib/generators/event_machine/templates/event.rb

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+for_action <%= parsed_controller_name %>Controller, :<%= action_name %> do
+
+  before do
+    # This will be called before <%= parsed_controller_name %>#<%= parsed_action_name %>
+  end
+
+  after do
+    # This will be called after <%= parsed_controller_name %>#<%= parsed_action_name %>
+  end
+
+end

lib/generators/event_machine/templates/functional_test.rb

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+require File.dirname(__FILE__) + '/../../test_helper'
+require File.dirname(__FILE__) + '/../../functional/events/events_base_test'
+require '<%= parsed_controller_name.underscore -%>_controller'
+
+# Re-raise errors caught by the controller.
+class <%= parsed_controller_name -%>; def rescue_action(e) raise e end; end
+
+class <%= parsed_event_name.camelize -%>Test < EventBaseTest
+
+  fixtures :users
+
+  def setup
+    @controller = <%= parsed_controller_name.camelize-%>.new
+    @request = ActionController::TestRequest.new
+    @response = ActionController::TestResponse.new
+    
+    prepare
+    load_event "app/events/<%= parsed_event_name-%>_event.rb"
+    emulate_login
+  end
+
+  # Put actual tests here
+  def test_true
+    assert true
+  end
+
+end