Namespace scan

You can scan loaded namespaces for annotated vars and automatically create caches. The scan looks for Vars with :memento.core/cache key in the meta. That value is used as a cache spec.

Given require [memento.ns-scan :as ns-scan]:

(ns myproject.some-ns
  (:require 
    [myproject.cache :as cache]
    [memento.core :as m]))

; defn already has a nice way for adding meta
(defn test1
  "A function using built-in defn meta mechanism to specify a cache region"
  {::m/cache cache/inf}
  [arg1 arg2]
  (+ arg1 arg2))

; you can also do standard meta syntax
(defn ^{::m/cache cache/inf} test2
  "A function using normal meta syntax to add a cache to itself"
  [arg1 arg2] (+ arg1 arg2))

; this also works on def
(def ^{::m/cache cache/inf} test3 (fn [arg1 arg2] (+ arg1 arg2)))

; attach caches
(ns-scan/attach-caches)

This only works on LOADED namespaces, so beware.

Calling attach-caches multiple times attaches new caches, replaces existing caches.

Namespaces clojure.* and nrepl.* are not scanned by default, but you can provide your own blacklists, see doc.