: Devotes sections to writing robust tests for security configurations, ensuring that protection remains intact during development. Spring Security in Action, Second Edition [Book] - Oreilly
Moving from the classic "login form with session" to a stateless JWT architecture is the defining skill upgrade of the second edition. By configuring SessionCreationPolicy.STATELESS and moving the authentication logic into a custom filter, you transform your Spring Boot application from a memory-bound monolith into a horizontally scalable, cloud-ready service. spring security in action second edition
This works, but it breaks in distributed systems. If you have two instances of your app behind a load balancer, user A logging into Instance #1 must send their next request to Instance #1. That is , and it is an anti-pattern for resilience. : Devotes sections to writing robust tests for