(ns yourapp
  (:require [ninjakoala.ttlr :as ttlr]))
(defn update-costly-thing
  []
  (Thread/sleep 10000)
  {:some "data"})
(ttlr/init :cpu-count 1)
; Wait ten seconds after this next call (we're seeding the state with the result of (update-costly-thing))
(ttlr/schedule :costly-thing update-costly-thing (* 60 1000) (update-costly-thing))
; Now retrieve your costly thing quickly and it'll be updated in the background every minute.
(ttlr/state :costly-thing)

ttlr

TTL with refresh. You schedule refreshes to take place and store things under a particular :key-name.

Why not memoize or core.cache?

Because we wanted a way to be able to retrieve things in the background rather than have a user take the penalty of retrieving the item when the cache expires.

License

Distributed under the Eclipse Public License either version 1.0 or (at
your option) any later version.