PersistBookEntity.java

Book b = new Book();
b.setTitle(“The Hound of the Baskervilles”);
b.setPublishingDate(LocalDate.of(1902, 4, 30));
em.persist(b);

UUIDVersion1.java

@Entity
public class Book {

	@Id
	@GeneratedValue(generator = “UUID”)
	@GenericGenerator(
		name = “UUID”,
		strategy = “org.hibernate.id.UUIDGenerator”,
		parameters = {
			@Parameter(
				name = “uuid_gen_strategy_class”,
				value = “org.hibernate.id.uuid.CustomVersionOneStrategy”
			)
		}
	)
	@Column(name = “id”, updatable = false, nullable = false)
	private UUID id;
	
	…
}

UUIDVersion1.log

12:35:22,760 DEBUG AbstractSaveEventListener:118 – Generated identifier: c0a8b214-578f-131a-8157-8f431d060000, using strategy: org.hibernate.id.UUIDGenerator
12:35:22,792 DEBUG SQL:92 – insert into Book (publishingDate, title, version, id) values (?, ?, ?, ?)
12:35:22,795 TRACE BasicBinder:65 – binding parameter [1] as [DATE] – [1902-04-30]
12:35:22,795 TRACE BasicBinder:65 – binding parameter [2] as [VARCHAR] – [The Hound of the Baskervilles]
12:35:22,796 TRACE BasicBinder:65 – binding parameter [3] as [INTEGER] – [0]
12:35:22,797 TRACE BasicBinder:65 – binding parameter [4] as [OTHER] – [c0a8b214-578f-131a-8157-8f431d060000]

UUIDVersion4.java

@Entity
public class Book {

	@Id
	@GeneratedValue(generator = “UUID”)
	@GenericGenerator(
		name = “UUID”,
		strategy = “org.hibernate.id.UUIDGenerator”,
	)
	@Column(name = “id”, updatable = false, nullable = false)
	private UUID id;
	
	…
}

UUIDVersion4.log

12:23:19,356 DEBUG AbstractSaveEventListener:118 – Generated identifier: d7cd23b8-991c-470f-ac63-d8fb106f391e, using strategy: org.hibernate.id.UUIDGenerator
12:23:19,388 DEBUG SQL:92 – insert into Book (publishingDate, title, version, id) values (?, ?, ?, ?)
12:23:19,392 TRACE BasicBinder:65 – binding parameter [1] as [DATE] – [1902-04-30]
12:23:19,393 TRACE BasicBinder:65 – binding parameter [2] as [VARCHAR] – [The Hound of the Baskervilles]
12:23:19,393 TRACE BasicBinder:65 – binding parameter [3] as [INTEGER] – [0]
12:23:19,394 TRACE BasicBinder:65 – binding parameter [4] as [OTHER] – [d7cd23b8-991c-470f-ac63-d8fb106f391e]