JPA LockModeType without version field

Question

As I understand, JPA 1.0 LockModeType.write works with field annotated @Version.

This field is incremented each time, when entity is read or written. But how JPA works when this field is absent?

http://alvinalexander.com/java/jwarehouse/hibernate/hibernate-core/src/matrix/java/org/hibernate/test/jpa/lock/JPALockTest.java.shtml — Sunny Gupta, May 21 '13 at 08:08

score 1 · Answer 1 · answered Jan 25 '12 at 09:59

1

Take a look at Field Locking. When using field locking fields are compared when updating.

Take a look at here.

answered Jan 25 '12 at 09:59

Ortwin Angermeier

score 0 · Answer 2 · answered Jan 25 '12 at 14:48

0

Lock mode only applies to entities configured with an @Version. It will either throw an error, or have no affect without a version.

JPA 2 also defines pessimistic locking, and some JPA providers provide other forms of locking.

answered Jan 25 '12 at 14:48

James

2 Answers2