Spring Webflux Introduction
Spring Webflux has been introduced as part of Spring 5, and with this, it started to support Reactive Programming. It uses an asynchronous programming model. The use of reactive programming makes applications highly scalable to support high request load over a period of time.
What Problem It Solved Compared With Spring MVC
Spring MVC uses a Synchronous Programming model, where each request has been mapped to a thread and which is responsible to take the response back to the request socket. Cases where applications make some network calls like, fetch data from a database, fetch a response from another application, file read/write etc., a request thread has to wait to get the desired response.