Does it support Swagger now? For my last implementation, I wanted a good automatic API documentation, and I'd rather have the client code in a generated way, and of the three Scala microframeworks that I had a look at, only Scalatra had kinda solid Swagger support. Neither Spray nor Finagle did. Though in hindsight the Swagger release in the current Scalatra is a bit old and thus it has tons of bugs and issues that are fixed in current Swagger but I found it impossible to just update Swagger.
I believe that Twitter tends to define their services as Thrift interfaces, which forms it's own documentation for the application rather than having to crawl through code to find which REST URL endpoints are being listened to.
I could be wrong but I think Finagle reflects this in that Thrift is more of a first-class citizen than REST (although I'm sure the latter is possible).
