Prtotocols tend to be useful for the same reason as Java interfaces. For example, Ring uses a protocol to specify the contract for the adapter. So, then you can

Prtotocols tend to be useful for the same reason as Java interfaces. For example, Ring uses a protocol to specify the contract for the adapter. So, then you can just implement it and seamlessly drop in wrapper Jetty or Undertow or whatever. https://github.com/ring-clojure/ring/tree/master/ring-core-protocols https://github.com/ring-clojure/ring/tree/master/ring-core-p...