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Table Of Contents
Microservices Design Patterns in .NET - Second Edition
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Implementing a pub-sub architecture offers significant benefits in decoupling system components and enhancing scalability. However, it also presents several challenges impacting system performance, reliability, and maintainability.One primary challenge is ensuring message ordering. In pub-sub systems, messages may not arrive in the sequence they were sent. This disorder can lead to inconsistencies if messages need to be processed in a particular sequence. To address this, developers can include sequence numbers or timestamps within the message payload, allowing subscribers to reorder messages upon receipt. We will investigate a solution to this next.
Implementing such sequencing requires careful design to ensure that all messages are appropriately tagged and that subscribers have the logic to reorder them correctly. First, ensure that the AppointmentCreated event includes a property for the sequence number. This allows each message to...