How to implement GCM CCS(XMPP) server on app engine?

[Dev via StackOverflow]

I am Developing CCS server using XMPP,I followed all steps given on the developer.android website.This code(using java smack library) runs perfectly,as I am getting notification on my android mobile app.I have CCS service enabled on my App Engine Project.But when I tried to deploy it on App engine I am getting.

java.lang.NoClassDefFound Exception for org/jivesoftware/Smack/XMPPException !!!!!!

after going through some websites (including this also)and developer.android site I found that

Note that Google App Engine does not support connections to CCS

My question is:

1>>.App Engine doesn't support java smack library or it don't support connection to ccs(xmpp)end point at all?

google has also provided XMPP service to App Engine

2>>.Is it possible to implement GCM CCS(XMPP) server using googles XMPP library?If it is possible please give some reference or tutorial.

I can really use some help with this questions,because I am so confused what do next!!!

thanks in advance!!!

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