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Ansible Handlers setup for Tomcat

Handlers in Ansible are used to run operations based on a change. For example, a template command in a playbook could have a 'notify: restart apache' section at the end. This would be run (at the end of the playbook) if that template command changes something. If nothing changes, with that specific template command at least, then that notify command wouldn't be triggered.

roles/apache-tomcat/handlers/main.yml 

# handlers file for apache-tomcat
# All that's really here for now is just commands to start, stop, and restart tomcat.
- name: stop tomcat
  ansible.builtin.systemd:
    name: tomcat
    state: stopped

- name: start tomcat
  ansible.builtin.systemd:
    name: tomcat
    state: started

- name: restart tomcat
  ansible.builtin.systemd:
    name: tomcat
    state: restarted

References