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Table Of Contents
Microservices Design Patterns in .NET - Second Edition
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This chapter thoroughly explored the event sourcing pattern, emphasizing its role in modern software architecture, particularly within microservices. Event sourcing records all state changes as a series of immutable events, offering insights into the data’s evolution and enabling robust features such as audit trails, state reconstruction, and real-time processing.
An event records a change in the system, such as creating an appointment or processing a payment. Events possess key attributes such as a unique identifier, timestamp, and payload, making them immutable and reliable. This immutability ensures data integrity and supports reproducibility, auditability, and decoupling between components, enabling independent evolution of system modules.
After defining an event, we proceeded to review its implementation. Individual services maintain their data stores, creating data synchronization and consistency challenges. Event sourcing mitigates this by using an event...