Using Apache ActiveMQ + XMPP over plain XMPP for messaging

I am producing a message passing system and considering using ActiveMQ with XMPP as the transport. I have used plain XMPP with OpenFire server for similar messaging based communication between distributed parts of a system. What would be the advantage of layering ActiveMQ on top of XMPP, given the built in Jabber server in Apache ActiveMQ is nowhere as neat and extensible out of the box as the Openfire Jabber server.

Question 1) Can I replace the built-in Jabber se开发者_开发问答rver with Openfire and still use ActiveMQ ?

All the client and server components are going to be in Java and I have used the Openfire Xmpp (Spark) libraries in the past.

Question 2) What will the attraction of ActiveMQ for brokering XMPP

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ActiveMQ dropped support for XMPP a few releases ago so you probably won't find any advantage to using it in this manner. The XMPP support was not very well implemented and never got a lot of use.