Clojurians Log v2

Hello Folks! I am trying to build a UI that is updated with information that I receive from another service via file pipe. Ive gotten as far as creating a context that contains the updates from my external service and now I am trying to update the context with the messages as they come in. The project readme wasnt very clear on the use of fx/swap-context. Ive tried using it a few ways and have not been successful. Here is my context and update function (add-json-message):

.......

;; simple permutation of json into label
(defn paint-message
  [message]
  {:fx/type :label
   :text (json/write-str message)})

;; atomic global state for the UI
(def main-context  (atom (fx/create-context
                          {:contacts []
                           :messages []}
                         cache/lru-cache-factory)))

(defn add-json-message
  [obj]
  (fx/swap-context main-context conj :messages (paint-message obj)))

.........

Caused by: java.lang.NullPointerException: Cannot invoke "java.util.concurrent.Future.get()" because "fut" is null

Also curious: does this project have a room on matrix by chance?

oh no, yet another chat app…