Is JBoss EAP supported by Red Hat, if we use Infinispan for our user application ?

Hello Red Hat Support,

we have some questions about using Infinispan Cache with JBoss EAP.

We are aware that infinispan is used for the jboss internal caching.
For applications, there is the licensed jboss data grid Cache.

In this solution id (https://access.redhat.com/solutions/281643) it is said, that:

"The direct use of Infinispan API is not supported in JBoss EAP"

Our questions:

1.) Please explain the meaning of "direct" (as mentioned above).
2.) How is the Support of JBoss EAP effected by the use of Infinispan ?
3.) What is the correct way, to use Infispan in a user application without licensing JBoss Data Grid ?

Regards

Matthias Bieker, Postbank Systems AG