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Join Gavin King, creator of Hibernate and current IBM developer, in this comprehensive interview that cuts through decades of ORM misconceptions and over-engineering practices. Discover pragmatic approaches to Java persistence that prioritize shipping working software over architectural purity. Learn when to abandon complex repository patterns in favor of simple SQL queries or database views, especially when dealing with legacy schemas. Explore the three inheritance mapping strategies and understand why table-per-class mapping can hurt performance. Examine how the DRY principle extends beyond mere code duplication to encompass thoughtful design that emerges through refactoring rather than upfront architecture. Compare stateless versus stateful sessions to reduce magical behaviors and unexpected bugs in your applications. Understand how Jakarta Data 1.0 and 1.1 differ from Spring Data patterns and why these differences benefit developers. Master techniques for handling legacy database schemas, optimizing performance, and embracing the reality that leaky abstractions can actually be beneficial. Gain practical rules of thumb for writing efficient SQL and minimizing database round-trips while avoiding the dreaded LazyInitializationException. The discussion covers when ORMs excel at operations over object graphs versus when raw SQL queries provide better solutions for single-screen displays.
