Event-Driven Architecture

Instructions

1. •

   System design

   • •Identify event producers, consumers, and brokers
   • •Define asynchronous communication boundaries
   • •Ensure loose coupling between microservices
2. •

   Kafka fundamentals

   • •Create and manage Kafka topics
   • •Configure partitions and replication factors
   • •Implement producers and consumers
   • •Handle offsets, retries, and error scenarios
3. •

   Pub/Sub patterns

   • •Apply publish/subscribe for inter-service communication
   • •Design fan-out and event streaming use cases
   • •Ensure idempotent event handling
4. •

   Platform setup

   • •Work with Redpanda Cloud or self-hosted Kafka clusters
   • •Configure local and cloud-based environments
   • •Secure Kafka with authentication and authorization
5. •

   Dapr integration

   • •Use Dapr Pub/Sub with Kafka or Redpanda
   • •Implement State Management for event-driven workflows
   • •Use Bindings for external systems
   • •Manage Secrets securely
   • •Enable Service Invocation for sync calls when required
6. •

   Event contracts

   • •Design clear event schemas (JSON, Avro, or Protobuf)
   • •Version events safely without breaking consumers
   • •Validate and document message contracts

Best Practices

• •Prefer events over direct service calls
• •Keep events immutable and self-describing
• •Design for at-least-once delivery
• •Handle duplicate events gracefully
• •Version schemas explicitly
• •Monitor lag, throughput, and failures
• •Separate command and event topics

Example Structure

# Kafka Topic
name: order.created
partitions: 6
replicationFactor: 3