diff --git a/lib/outboxable.rb b/lib/outboxable.rb
index da90080..cc2a6bd 100644
--- a/lib/outboxable.rb
+++ b/lib/outboxable.rb
@@ -2,7 +2,55 @@
 
 require_relative "outboxable/version"
 
+require 'outboxable/worker'
+require 'outboxable/publishing_manager'
+require 'outboxable/polling_publisher_worker'
+require 'outboxable/connection'
+require 'outboxable/configuration'
+require 'outboxable/rabbitmq/publisher'
+
+
 module Outboxable
   class Error < StandardError; end
-  # Your code goes here...
+  
+  extend ActiveSupport::Concern
+
+  included do
+    after_create :instantiate_outbox_for_create, if: proc { |object| object.check_outbox_condition(object:, operation: :create) }
+    after_update :instantiate_outbox_for_update, if: proc { |object| object.check_outbox_condition(object:, operation: :update) }
+
+    has_many :outboxes, as: :outboxable, autosave: false
+
+    def instantiate_outbox(routing_key: )
+      outboxes.new(
+        routing_key:,
+        exchange: Outboxable.configuration.rabbitmq_event_bus_exchange,
+        payload: as_json
+      )
+    end
+
+    def instantiate_outbox_for_create
+      routing_key = outbox_configurations[:run_on][:create]&.[](:routing_key) || "#{outbox_configurations[:base][:routing_key]}.created"
+      instantiate_outbox(routing_key:).save!
+    end
+
+    def instantiate_outbox_for_update
+      routing_key = outbox_configurations[:run_on][:update]&.[](:routing_key) || "#{outbox_configurations[:base][:routing_key]}.updated"
+      instantiate_outbox(routing_key:).save!
+    end
+
+    def check_outbox_condition(object:, operation:)
+      # Check if called on create
+      operation_is_included = object.outbox_configurations[:run_on].keys.include?(operation)
+
+      # Check if there is a supplied condition
+      supplied_condition_as_proc = object.outbox_configurations[:run_on][operation][:condition]
+
+      # Return the result of operation is included if supplied condition is blank, which mean that there is no condition to be met
+      return operation_is_included if supplied_condition_as_proc.blank?
+
+      # Else check the condition as well as the inclusion of the operation
+      operation_is_included && supplied_condition_as_proc.call(self)
+    end
+  end
 end