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mount
2016-09-21T19:32:47.000269Z
i am working a project where a state is dependent on other states. ie: conn1 (conn2 conn1 config) (conn3 conn1 conn2) how do i express this in mount?
tolitius 2016-09-21T20:40:32.000271Z
@dhruv1: do you mean that conn1 should be started before conn2, and "`conn1` and conn2" should be started before conn3?
tolitius 2016-09-21T20:45:35.000273Z
if you have states defined as:
(defstat config :start ...)
(defstate conn1 :start (new-conn config)
(defstate conn2 :start (new-conn conn1 config))
(defstate conn3 :start (new-conn conn1 conn2))
:order to each state as they were compiled. and since conn2 can't be compiled without compiling conn1 and config, it will be "ordered"/started after them. 2016-09-21T21:21:32.000275Z
something like this https://github.com/stuartsierra/component#systems
2016-09-21T21:21:55.000277Z
@tolitius injecting dependencies
2016-09-21T21:23:08.000279Z
ok i think this reflects what i’m talking about https://github.com/tolitius/mount/blob/master/README.md#start-and-stop-order
2016-09-21T22:38:19.000286Z
this is interesting.
I defined a var with a defstate but made a mistake the first time around.
;; not the same mistake but it will help elaborate what I’m trying to explain
(def conn1-atom (atom nil))
(defstate conn
:start (reset! conn1-atom :started)
:stop (reset! :started conn1-atom)) ;; there is a mistake in :stop.
ClassCastException clojure.lang.Keyword cannot be cast to clojure.lang.IAtom clojure.core/reset! (core.clj:2273)
;; trying to re-define conn but keep running into the same error.
(defstate conn
:start (reset! conn1-atom :started)
:stop (reset! :started conn1-atom))