In contrast, messages serve a broader role, encompassing commands (e.g., ProcessPayment), events (e.g., PaymentProcessed), and documents (e.g., DataPayload). Both events and messages can support various delivery guarantees, including at-least-once, at-most-once, and exactly-once, depending on the technology stack and implementation. However, exactly-once delivery is often achieved through idempotency mechanisms rather than true, infrastructure-level exactly-once semantics.
In contrast messages serve a broader role encompassing commands (eg ProcessPayment) events (eg PaymentProcessed) and documents (eg DataPayload) Both events and messages can support various delivery guarantees including at-least-once at-most-once and exactly-once depending on the technology stack and implementation However exactly-once delivery is often achieved through idempotency mechanisms rather than true infrastructure-level exactly-once semantics