A monitoring and notification class for immediately communicating website outages to a webmaster, or webmaster(s).
Basically, the class simulates a web request to a specified URL and either SMSs, calls, or e-mails any number of website administrators if an error occurs (according to http header status code returned).
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Google has announced a number of improvements to Firebase, an application development platform the company acquired in 2014. Improvements include the addition of Crashlytics, updates to the Cloud Messaging API, a new A/B testing framework, and a new product Firebase Predictions.