I found that there is an XAPI RRDs within XenServer (Host)
http://wiki.xensource.com/xenwiki/XAPI_RRDs
http://www.jansipke.nl/getting-cpu-memory-disk-and-network-metrics-from-xenserver
I am not able to find a APM Template to pull this info.. Should be very close to the Tomcat template..
How do you create a new template to pull this XML data? Has anyone built one?