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Yes indeed. You can mix and match Java, JavaScript, Ruby and Groovy in the same app. We hope to support more languages going ahead (e.g. Java, Scala, ...)

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Once you get Scala, I'll be heading your way. :-)

You already have Scala+Async IO+Netty, it's called play framework 2.0

http://www.playframework.org/

I've used it. Not a fan of many (most) of their design decisions, though it's better than the current alternatives.

+1 for Scala

Might be nice to also see a FAQ about the differences between vert.x and Play 2

Hopefully Scala won't be too long :)

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