# Asynchronous method answering requests such as `async_service?str=some_string`
	#
	# This method is executed by the `thread_pool` attribute of this class.
	# Be careful when using the `async` argument to follow all the good
	# concurrent programming pratices.
	fun async_service(str: String): HttpResponse
	is restful(async) do

		# "Work" for 2 seconds
		2.0.sleep

		# Answer
		var resp = new HttpResponse(200)
		resp.body = "async_service {str}"
		return resp
	end