Clojurians Log v2

To halt-key! a particular thing, I think I need to have access to the big handler map, but halt-key! is only passed a key and a value. IIUC, it's passed its own key, and the return value of init-key.

What do you mean by “big handler map”?

(defmethod ig/init-key :runners [_ {:keys [handler] :as opts}]
  (runners/start-one-run-after-another handler))

i'd love to know the domain term for that!

The configuration value is what I usually call it.

And the output from ig/init-key is the initiated value

oh wait. I could write something like:

(defmethod ig/init-key :runners [_ {:keys [handler] :as opts}]
  (runners/start-one-run-after-another handler)
handler)

(defmethod ig/init-key :this.needs.to.be.namespaced/runners [_ {:keys [handler] :as opts}]
  {:runners (runners/start-one-run-after-another handler))
   :handler handler})

(defmethod ig/halt-key :this.needs.to.be.namespaced/runners [_ {:keys [handler]}]
  (runners/stop handler))

Right 🙂

but of course! makes sense. thanks so much

Typically the return value from ig/init-key should contain everything you keep to clean up after itself.

Also it’s a good idea to namespace your keys, as unnamespaced keys can’t be inherited from.

oh ok, neat