Learn how to implement OAuth2 resource server with JWT validation and stateless sessions in Spring Security, including failure scenarios, security considerations, and practical code examples.
Learn Spring WebFlux reactive programming: Master Mono and Flux from Project Reactor, build non-blocking controllers, and use WebClient for async HTTP calls.
Run integration tests with real PostgreSQL, MySQL, Redis, and Kafka services using Testcontainers. Learn setup, networking, CI configuration, and cleanup.
Understand Spring Boot fundamentals: how auto-configuration works, using starter POMs, deploying with embedded servers, and production-ready features.
Learn async-profiler for low-overhead CPU and memory profiling in production. Generate flame graphs, analyze allocations, and diagnose JVM bottlenecks.
Understanding Java atomic operations: AtomicInteger, AtomicReference, VarHandle, compareAndSet, atomics vs locks, and lock-free programming patterns.
A technical deep dive into the JVM bytecode verifier, covering type checking, stack map frames, the four verification stages, and what happens when verification fails.
A guide to Class Data Sharing in the JVM, covering how CDS and AppCDS work, how to create shared archives, and how they reduce startup time and memory footprint.
Deep dive into the JVM Class Loader subsystem covering loading, linking, initialization phases and the ClassLoader hierarchy with parent delegation model.
How CMS and G1 garbage collectors reduce pause times through concurrent marking, region-based heap layout, and incremental compaction.