RIFE has gathered a lot of interest lately, and a lot thanks to its pure Java continuations engine. For quite some time I have been planning to extract the continuations support into a dedicated library, but never got around to doing so due to time constraints.
About a week ago I was approached by Patrick Lightbody who wanted to help out with this task so that WebWork could provide continuations too. A few days later we had a first prototype running and it has already been integrated in the recent release of WebWork 2.2 beta2.
Currently this is almost a straight extraction from the RIFE sources and it still needs a lot of love and cleaning up to make it truly general-purpose.
If you're interested in helping out, you can find more information on the RIFE/Continuations project page. Note that sub-project it is still very experimental, but that the engine itself has been stable inside RIFE for years. Quite some people have approached me about this in the past, so I thought it would be good to already announce the effort. When a lot of eyes look at it, I'm sure we'll come up with a much better API.
The following resources have been set up for RIFE/Continuations:
Let's bring continuations to everyone in the Java world!