Understanding CQRS with Real-Life Examples
1. CQRS in an Online Store (Real-Life Example) In this diagram, we see an online store architecture applying CQRS: API Gateway : The entry point for all client requests. It routes incoming calls to the right backend service. Frontend Service : Connects to various backend services depending on the operation. Products Service (Write Side) : Responsible for updating product information (e.g., adding new products, changing prices, updating stock). Products Search Service (Read Side) : Maintains a denormalized, read-optimized view of product data so customers can quickly search and filter products. Reviews Service : Handles user reviews separately, but it also feeds into the search service so that reviews can be displayed alongside products. Notice that the Products Service and the Products Search Service do not share the same database. Instead, updates from the Products Service trigger events (via message queues or change notifications), and the Search Service...