I'm working on a tool to orchestrate the migration from mongodb to datomic, 
and i'm looking for a bit of design feedback as i'm new to clojure. 


The user needs to provide functions that transform mongodb documents into 
datomic txes. Do y'all prefer the top or bottom style, or think there's a 
different way to implement this design that might be better?
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;; Multimethod for transforming data based on the name of the source mongodb 
collection 
(defmulti transform identity)
 
(defmethod transform "events" [data]
   ;; do something with data
 )
 
(defmethod transform "users" [data]
   ;; do something with data
 )
 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
(defprotocol Collection-Transformer
   (transform [mongo-db document]))
 
(def user-transformer
 (reify Collection-Transformer
  (transform [m d] "do stuff")))

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