Capstone - Designing a Notification System

1. How This Capstone Works

The previous seven lessons introduced seven ways to move data. This capstone applies all seven to one design, and it uses six of them.

These patterns are not steps in a sequence. You choose one separately for every arrow in the architecture.

A notification system uses every communication direction in this module. Facts enter the system, jobs move through queues, and calls go out to external providers. Webhooks return delivery status, streams update browsers, and enterprise deliveries cross company boundaries.