The zero generation revolves around the java.util.observable interface and the related callbacks. It essentially uses the observable design pattern for reactive development. It lacks the necessary support of composition, operators, and backpressure.
Zero generation
Get Hands-On Reactive Programming with Reactor now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.