The attached patch extends java.jmx to support creating beans that expose invokable operations. Operation function definitions are supplied after the state-ref in the create-bean form in a syntax similar to protocol method implementations. Type signatures, descriptions, and impact constants are harvested from metadata on the operation definitions. Nontrivial argument type binders (rest arguments, destructuring, etc) in operations are not supported.
I am sure this patch could be improved in many ways; the operation method parser in create-bean feels unnecessarily hairy and yet limited at the same time, because my macro-fu is not yet strong. The documentation examples are not yet updated, though I am happy to do this if the feature is reviewed and accepted.