Emitting API Events

Overview

Build event-driven API architectures using outbound webhooks, Server-Sent Events (SSE), and message broker integration. Implement event emission from API mutations, event schema registry, subscriber management, delivery guarantees with retry logic, and event sourcing patterns for maintaining a complete audit log of API state changes.

Prerequisites

• Message broker: Redis Pub/Sub, RabbitMQ, Apache Kafka, or AWS SNS/SQS
• Persistent storage for event log and subscriber registrations (PostgreSQL, MongoDB)
• Webhook delivery infrastructure with retry queue (Bull, Celery, or managed service)
• Event schema registry for versioned event type definitions
• SSE-capable web framework for real-time event streaming to browser clients

Instructions