Stream Joins vs State Machines

SquareBlog: "stream joins vs. state machines vs. table-o-state vs. MechaGodzilla"

Hans Glide writes: "I recently looked at using many event processing engines, which I?m starting to write about here. I found the following use case to be interesting in terms of revealing features of the products and sparking discussion." ....

This piece is one of the few pieces posted with a user perspective of features in event processing engines... a good place to start to see how vendors might be approaching the problem of feature set in a field still not fully defined.