Design Patterns
design patterns what is DDD (Domain Driven design) saga design pattern API gateway design pattern adapter design pattern event sourcing CQRS what is event sourcing it is adding an event at every stage crossed by an entity. This acts nicely for auditing and so much more than that. For any entity the current state can be reached at by replaying the events it has gone through. Event tracing gives a trail of chronology of stages through which the entity has eveolved. the event sourcing addresses a challenge of implementing an event-driven architecture. Event sourcing pattern has an event store which acts both as a DB and a message broker. An entity keeps persisting its states in the store during its lifecycle. And the subscribing parties can fetch reqd info from the event store about particular entity. event sourcing helps enable event-driven arch. Read more: https://javarevisited.blogspot.com/2021/09/microservices-design-patterns-principles.html#ixzz7ra2LuRjk What is CQRS: - com