custom resource create improved

create.rb

action :create do
  # calls the block if current_resource does not exist
  # or values are different from current_resource
  converge_if_changed do
    if current_resource
      action_update
    else
      converge_by "Create topic #{new_resource.topic}" do
        create! new_resource.directory,
                new_resource.zookeeper,
                new_resource.topic,
                new_resource.partitions,
                new_resource.replicas
      end
    end
  end
end