Pass env variables to application during deploy Tomcat 7

[John Beaulaurier -X (jbeaulau - ADVANCED NETWORK INFORMATION INC at Cisco)]

Hello,

We need to pass on some environment variables to the application being deployed 
at the time it's being deployed in Tomcat 7. Where should
that be done. Context.xml, server.xml, setenv.sh....?

Thank you
-John