what web framework azkaban use for development?

basically i want to develop a configuration management system based on Azkaban，that system takes job configuration info form web page,and integrated with azkaban for task scheduling,so i want to know what web development framework azkaban use?

i googled a lot ,but didnt find related references yet,i looked at the source code of Azkaban ,but i dont't really understand.

any help will be appreciated!