Learning about push notifications

Push notifications are delivered using subscriber-based Platform Notification Systems (PNSes). PNSes are unique to mobile platforms. Platforms include Firebase for Android devices, Apple Push Notification services for iOS platform devices, and Windows Notification services for Windows-based devices. Vendors that develop multi-platform applications must integrate with each PNS for which they wish to offer push notifications.The following diagram depicts a basic overview of a PNS:

Figure 6.1 – Overview of a push notification system

In order to implement push notifications, developers must write both the client and server applications in a way that can communicate with the Push Notification System. Push notifications generally have several moving parts:

• Mobile devices: An application on the end user's mobile device will register with the application or server infrastructure...