A senior-level breakdown of how @Transactional really works: AOP proxy mechanics, CGLIB vs JDK proxy, ThreadLocal transaction binding, flush/commit timing, propagation internals, isolation levels, and the production traps that cause silent data corruption, connection pool exhaustion, and 2 AM alerts.
Detailed guide and senior deep dive into JPA/Hibernate best practices for @ManyToOne and @OneToMany mappings based on Thorben Janssen's tutorial.
Databases, web frameworks, and all third-party frameworks are details — implementation choices that should be deferred and hidden behind boundaries. Learn why treating them as the center of your architecture leads to rigidity and how to protect your business rules from them.
A comprehensive guide to JPA and Hibernate persistence methods — entity lifecycle states, persist vs save vs merge vs update, primary key strategies, performance implications, and production deep dives for senior engineers.
A deep dive into @Transactional — how AOP proxy, ThreadLocal connection binding, propagation traps, async pitfalls, and rollback rules work under the hood in Spring Boot.
A complete guide to custom JPQL, Native SQL, SpEL, projections, and senior-level internals — persistence context mechanics, N+1 prevention, memory optimization, and connection pool management.
