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Hibernate / Hibernate 7 Basics Interview Questions

What are the key removed APIs in Hibernate 7 and how do you migrate?

Hibernate 7 removes all APIs deprecated in Hibernate 6.x. Anything deprecated in 6.x is hard-deleted in 7.0 with no fallback.

Key API removals in Hibernate 7
RemovedReplacement
session.save()session.persist()
session.get()session.find()
session.delete()session.remove()
session.update()session.merge()
session.saveOrUpdate()session.merge()
session.lock(detached)Load fresh with lock: session.find(Class, id, LockMode)
session.refresh(detached)Only on managed entities
hibernate.allow_refresh_detached_entityRemoved entirely
Configuration.addClass()Configuration.addAnnotatedClass()
hbm.xml mapping filesAnnotation-based mapping or orm.xml
Ehcache 2.x integrationEhcache 3.x, Caffeine, or Infinispan
// Automated migration:
// mvn rewrite:run -Drewrite.activeRecipes=org.openrewrite.hibernate.MigrateToHibernate70

// Manual: detached entity handling
// BEFORE:
session.update(detachedOrder);       // REMOVED!
detachedOrder.setStatus("DONE");
// AFTER:
Order managed = session.merge(detachedOrder);
managed.setStatus("DONE");

What is the Hibernate 7 replacement for the removed session.save() method?
What happened to hbm.xml mapping file support in Hibernate 7?

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