Event sourcing is a key pattern for designing eventually consistent cloud-native systems. Upstream services produce events as their state changes, and downstream services consume these events and produce their own events as needed. This results in a chain of events whereby services collaborate to produce a business process that results in an eventual consistency solution. Each step in this chain must be implemented as an atomic unit of work. Cloud-native systems do not support distributed transactions, because they do not scale horizontally in a cost-effective manner. Therefore, each step must update one, and only one, system. If multiple systems must be updated, then each is ...
Applying the event-first variant of the Event Sourcing pattern
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