require 'petl'

module ETL::Example
  extend Petl
  extend self

  def extract
    # Grab all data from source(s) here.
    # Perferrably return an array of hashes.
  end

  def transform rows
    # Manipulate the data extracted by the previous extract method.
  end

  def load rows
    # Load the transformed data here into the destination(s).
  end

  def source_count
    # Count the number of records from your source(s).
  end

  def destination_count
    # Same as #source_count but with your destination(s).
  end
end

# Run it!
ETL::Example.perform