In Reactive Streams, the Publisher acts as an emitter of data, sending elements to the Subscriber. It's akin to a news agency that publishes articles (data) to its subscribers. The Publisher must send data only when requested by the Subscriber, which allows for managing flow control, preventing data overload. For example, in an e-commerce server, a Publisher might emit product updates to users who have subscribed to price changes.
Additional Notes
Why does the Publisher in Reactive Streams matter in practice?
Track: Java
Topic: Reactive Streams
Focus: Publisher and Subscriber
Topics:JavaPublisher and SubscriberReactive Streams