Clojurians Log v2

Is it possible to make an atomic transaction consists of a d/q, some clojure computation, and a d/transact call? How do I ensure that no other thread can change the state of the database before I finish the final d/transact?

Would something like this work?

(locking conn
  (let [res (d/q ...)]
    ...computation...
    (d/transact conn ...))

@zhuxun2 Have a look at the compare-and-swap function. https://docs.datomic.com/cloud/transactions/transaction-functions.html#db-cas