Can you explain the concept of choreography in Saga and how it differs from orchestration?

In the context of the Saga pattern for managing distributed transactions:

• Choreography is an approach where each service independently reacts to events from other services and performs its actions. There is no central controller; interaction occurs through event exchange. This reduces coupling and increases scalability, but makes it more difficult to track the overall flow.

• Orchestration involves a central orchestrator (coordinator) that manages the sequence of service calls, controlling transaction execution and compensation. This simplifies control and debugging but creates a single point of failure and increases coupling.

Example of choreography: Service A publishes an event, Service B listens and reacts, then publishes its event, which Service C reacts to, and so on.

Example of orchestration: The orchestrator calls Service A, waits for the result, then calls Service B, and so forth, managing the entire logic.