simple-notifier

https://github.com/alexagranov/simple-notifier

Inspired by ActionMailer, Notifier offers Notifier::Base, a base class for creating notification handlers on any class or instance of a class. Simply define a method in your handler named after the type of object you would like to create notification events for, substituting any namespace "::" delineation with "_", along with a signature that allows for the object as the first parameter and an optional params hash. Then notify on that object or class by simply calling MyHandler.notify!(myclass, params).