add-event-handler

To add an event publisher and consumer using Dapr PubSub, you define event topics, create event structs, and register consumers within a service's worker to facilitate event-driven communication between microservices.

The outbox pattern ensures guaranteed event delivery in event-driven microservices. This approach supports both direct publishing and the outbox pattern to ensure reliable message queuing and robust inter-service data flow.

To structure an event when a new order is placed, you define a new event type like 'order.created' and publish it, allowing downstream services like payments and inventory to consume the event and react accordingly.

Event-driven architecture with Dapr PubSub works by allowing microservices to act as publishers or consumers. Services publish events to defined topics, and Dapr handles the reliable message queuing and delivery to registered consumer workers.

You should use event-driven communication in microservices when you need robust, asynchronous inter-service data flow. It allows independent services to react to events like 'user.registered' without blocking the publisher or requiring direct service dependencies.