;; ig-config.edn
:clj-gcp.pub-sub/subscriber
{:metrics-registry     #ig/ref :metrics/registry ;; a iapetos metric registry
 :handler              #ig/ref :pubsub/handler ;; a fn, described below
 :project-id                   "my-gcp-project"
 :topic-id                     "industry-data-lake-file-notifications"
 :pull-max-messages            10
 :subscription-id              "LOCAL_DEV.bucket-notifications.my-service"}

  { ,,, pub-sub message fields (always deserialized as JSON) ,,,
   :pubsub/attributes {:eventType "OBJECT_FINALIZE"}
   :pubsub/ack-id     "0000000ACK"}

;; these will be acked:
{:pubsub/ack-id     "0000000ACK"
 :ok? true}
{:pubsub/ack-id     "0000000ACK"
 :ok? false
 :retry? false}

;; this will be nacked:
{:pubsub/ack-id     "0000000ACK"
 :ok? false
 :retry? true}

;; ig-config.edn
:clj-gcp.pub-sub/subscriber.healthcheck
{:project-id     "my-gcp-project"
 :subscription-id "LOCAL_DEV.bucket-notifications.my-service"}