Additional Notes
What design principle does the Observer Pattern illustrate?
Track: Java
Topic: Software Architecture
Focus: Observer Pattern
Java: Observer Pattern
Answer
The Observer Pattern illustrates the principle of loose coupling.
Loose coupling means that the subject and observers know as little as possible about each other. In a checkout flow, the payment service (subject) can notify the order tracking system (observer) without needing to know how the tracking system processes the event. This makes it easier to add or remove observers without changing the subject's code.
Loose coupling means that the subject and observers know as little as possible about each other. In a checkout flow, the payment service (subject) can notify the order tracking system (observer) without needing to know how the tracking system processes the event. This makes it easier to add or remove observers without changing the subject's code.
Topics: Java Observer Pattern Software Architecture