12.6 Summary

• Spring WebFlux offers a reactive web framework whose programming model mirrors that of Spring MVC and even shares many of the same annotations.
• Spring also offers a functional programming model as an alternative to Spring WebFlux’s annotation-based programming model.
• Reactive controllers can be tested with WebTestClient.
• On the client side, Spring offers WebClient, a reactive analog to Spring’s RestTemplate.
• Although WebFlux has some significant implications for the underlying mechanisms for securing a web application, Spring Security 5 supports reactive security with a programming model that isn’t dramatically different from nonreactive Spring MVC applications.