Event Sourcing

Communicate and persist the change in state of domain entities as a series of atomically produced immutable domain events, using Event-First or Database-First techniques, to drive asynchronous inter-component communication and facilitate event processing logic.

Context, problem, and forces

Our cloud-native, reactive systems are composed of bounded isolated components, which provide proper bulkheads to make the components responsive, resilient, and elastic. The isolation is achieved via asynchronous, message-driven, inter-component communication. Components communicate by publishing events to an event stream as their state changes. We have chosen to leverage value-added cloud services to implement our event...