{# style 1 - long form #}
{% if filepath == '/var/opt/tomcat_1' %}
  {% set tomcat_value = tomcat_1_value %}
{% else %}
  {% set tomcat_value = tomcat_2_value %}
{% endif %}

{# style 2 - short form #}
{% set tomcat_value = tomcat_1_value if (filepath == '/var/opt/tomcat_1') else tomcat_2_value %}

{# style 3 - with ternary filter #}
{% set tomcat_value = (filepath == '/var/opt/tomcat_1')|ternary(tomcat_1_value, tomcat_2_value) %}

<Server port={{ tomcat_value }} shutdown="SHUTDOWN">