~background processing

Background Processing

class User extends Tower.Model
  @after "create", "welcome"

  @sendWelcomeEmail: (id) ->
    User.find id, (error, user) => Notification.welcome(user).deliver()
    
  welcome: ->
    User.queue "sendWelcomeEmail", @get("id")

In the above example, after a User is created we call it's welcome method. That queues a class method, passing the user id as a parameter. You pass the id rather than the whole User model to the queue method because this is going to be serialized to some backend key-value store, like Redis, and it's both a smaller amount of data to store, and it's easier to serialize/deserialize just an id.