Hands-On Reactive Programming in Spring 5

Reactive in Spring Security

In order to enforce the WebFlux module, Spring 5 provides improved reactive support in the Spring Security module. Here, the central enhancement is support for the reactive programming model via Project Reactor. As we might remember, the old Spring Security used ThreadLocal as a storage method for SecurityContext instances. That technique works well in the case of execution within one Thread. At any point in time, we may access a SecurityContext stored inside the ThreadLocal storage. However, problems occur when asynchronous communication comes into force. Here, we have to provide additional effort to transfer the ThreadLocal content into another Thread, and we do this for each instance of switching between Thread ...