All the examples in rama-demo-gallery have both Java and Clojure versions, including tests. There's also the introductory blog post for the Clojure API which builds a highly scalable auction application with timed listings, bids, and notifications in 100 LOC.
https://redplanetlabs.com/docs/~/tutorial1.html
https://github.com/redplanetlabs/rama-demo-gallery