Domain-Driven Design + Command Query Responsibility Segregation + Event Sourcing
summary
Covers using Domain-Driven Design (Greg Young style) together with CQRS and Event Sourcing to achieve consistency, independent scalability and fast reads. Commands are sent via a command bus to small aggregates that validate invariants and emit events saved in an append-only Event Store; state can be rebuilt and bugs fixed by appending compensating events. Events are published to an event bus to drive process managers and specialized read stores (relational, graph, document), testing follows given-events/when-command/then-expect-events, and Axon is suggested as a starter framework.
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