The Publish/Subscriber Messaging Bus (Pub/Sub) model is well-suited for high-volume, real-time communication and notification requirements. In this scenario, the retailer needs to notify its order management, warehouse, and billing systems within 15 minutes of order submission. Pub/Sub messaging systems enable asynchronous communication where messages (orders) are published to a topic and multiple subscribers (order management, warehouse, billing systems) receive notifications simultaneously. This decouples the systems and ensures that each subscriber receives the message promptly for subsequent processing.

References:

Understanding Pub/Sub Messaging

MuleSoft's Approach to Event-Driven Architecture