Answer by schmichri for Three solutions to structure a deployment with Ansible?

Short Answer: You do programming here. Consider Programming Standards (cleancode) like "package by feature" and build role which are reusable and express the reason of the role.e.g.

roles:  - role: jdk  - role: tomcat        (contains tasks with 'install tomcat', 'configure tomcat' )       (requires jdk)  - role: the_wepapp       (requires tomcat)

Futhermore: The underlying role e.g. the jdk should never know about the tomcat role etc...