Publish/subscribe mechanism used in patterns like Eventdriven microservices architecture

▪ Event-bus or message broker system is publishing events

between multiple microservices

▪ Communication provide with subscribing these events in an

async way.

▪ Kafka and RabbitMQ is the best tools for this operations. In

Serverless world, AWS EventBridge is best option for async

operations.

▪ Fanout Pattern Implementation with Amazon EventBridge and

SQS 

https://www.tibco.com/reference-center/what-is-event-driven-architecture#:~:text=Event%2Ddriven%20architecture%20is%20often,dependent%20on%20that%20one%20message.