The feature is present in Alpha2 but everything is still in flux and some bits are missing (besides javadoc and documentation). The javadoc and the missing features will be sorted by Alpha3. The full user guide documentation somewhere towards the Final. Stay tuned!
Adrian, Is this API independent of Lucene search or is this on top it? Could you point me to the classes that represent the reality.
It stands on the top of the Lucene. It's basically a new layer of abstraction. You can look on the org.infinispan.query.dsl.Query. :-)
I'm sorting out the documentation aspect as we speak. Meanwhile, you could have a look at this blog post (which basically summarizes all there is to know right now about this new feature ) http://blog.infinispan.org/2013/09/embedded-and-remote-query-in-infinispan.html