Triggers

Also known as listeners or watchers, these functions allow you to monitor collection activity; Each time a document is inserted, updated, or deleted, a call-back function is invoked.

(require '[clojure.tools.logging :as log])
(require '[com.timezynk.mongo.watch :as w])

(defn insert-fn [time doc]
  (log/spy time)
  (log/spy doc))

(w/on-insert :coll insert-fn)

Each of the three trigger functions – on-insert, on-update, on-delete – accepts a call-back function that must take two parameters:

• time Operation time, expressed as a java.util.Date object.

• doc A map containing either:

  (on insert) The inserted document including the newly created :_id field.

  (on update) The :_id field plus the updated fields of the document.

  (on delete) Only the :_id field of the deleted document.