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[defstate]: refactoring "magic" into a clean fn

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anatoly 2016-01-24 14:19:12 -05:00
parent 39a01c4727
commit c10a65dee2
1 changed files with 15 additions and 10 deletions
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25
src/mount/core.cljc
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@ -131,13 +131,24 @@
(up name state (atom #{})))
@inst)))
;;TODO: make private after figuring out the inconsistency betwen cljs compile stages
;; (i.e. _sometimes_ this, if private, is not seen by expanded "defmacro" on cljs side)
(defn mount-it [s-var s-name s-meta]
(let [with-inst (assoc s-meta :inst (atom (NotStartedState. s-name))
:var s-var)
existing? (cleanup-if-dirty s-name "(namespace was recompiled)")]
(update-meta! [s-name] with-inst)
(when existing?
(log (str ">> starting.. " s-name " (namespace was recompiled)"))
(up s-name with-inst (atom #{})))))
#?(:clj
(defmacro defstate [state & body]
(let [[state params] (macro/name-with-attributes state body)
{:keys [start stop suspend resume] :as lifecycle} (apply hash-map params)
state-name (with-ns *ns* state)
order (make-state-seq state-name)
sym (str state)]
order (make-state-seq state-name)]
(validate lifecycle)
(let [s-meta (cond-> {:order order
:start `(fn [] ~start)
@ -147,14 +158,8 @@
resume (assoc :resume `(fn [] ~resume)))]
`(do
(~'defonce ~state (DerefableState. ~state-name))
(let [meta# (~'assoc ~s-meta :inst (~'atom (NotStartedState. ~state-name))
:var (~'var ~state))
restart?# ((~'var mount.core/cleanup-if-dirty) ~state-name "(namespace was recompiled)")]
((~'var mount.core/update-meta!) [~state-name] meta#)
(~'when restart?#
(log (~'str ">> starting.. " ~state-name " (namespace was recompiled)"))
((~'var mount.core/up) ~state-name meta# (~'atom #{})))
(~'var ~state)))))))
(mount-it (~'var ~state) ~state-name ~s-meta)
(~'var ~state))))))
#?(:clj
(defmacro defstate! [state & {:keys [start! stop!]}]