Java: Message Brokers (Kafka)

Kafka topics enable asynchronous communication by decoupling producers and consumers.

In Kafka, a topic is a category or feed name to which records are published. Producers send data to topics, and consumers read from them. This decoupling allows producers to send messages without waiting for consumers to be ready. For example, in an e-commerce application, a user checkout service can publish order events to a topic, which inventory and shipping services consume independently.