entityManager.lock(e, LockModeType.READ); entityManager.refresh(e); Update some property of the entity (and merge) Commit Raw ... javax.persistence.OptimisticLockException: Newer version [2] of entity [[support.hibernate.entity.Employee#THE_KEY_HERE]] found in database at org.hibernate.internal...
而LockAcquisitionException则是Hibernate在处理数据库锁时抛出的异常,通常与数据库锁竞争有关。 2. 研究javax.persistence.OptimisticLockException异常 OptimisticLockException是在使用乐观锁时,检测到数据在提交时已被其他事务修改时抛出的异常。乐观锁通常通过版本号或时间戳来实现,以在数据提交时验证数据是否已被修改。 3...
Hibernate的加锁模式有: Ø LockMode.NONE:无锁机制。 Ø LockMode.WRITE:Hibernate在Insert和Update记录的时候会自动 获取。 Ø LockMode.READ:Hibernate在读取记录的时候会自动获取。 以上这三种锁机制一般由Hibernate内部使用,如Hibernate为了保证Update 过程中对象不会被外界修改,会在save方法实现中自动为目标对...
This will be covered in an upcoming article more deeply but overall it allows Hibernate to rewrite the update statement dynamically. @Entity @OptimisticLocking(type = OptimisticLockType.DIRTY) @DynamicUpdate publicclassVersionlessProduct{ @Id
Uses of OptimisticLockType in org.hibernate.annotations Methods in org.hibernate.annotations that return OptimisticLockType Modifier and TypeMethod and Description static OptimisticLockType OptimisticLockType.valueOf(String name) Returns the enum constant of thi...
optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) 出现以上异常,由于乐观锁version没有对上,导致操作数据库失败。 报错日志: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 or...
optimistic-lock="version" > …… </class> </hibernate-mapping> optimistic-lock 属性有如下可选取值: Ø none 无乐观锁 Ø version 通过版本机制实现乐观锁 Ø dirty 通过检查发生变动过的属性实现乐观锁 Ø all 通过检查所有属性实现乐观锁 其中通过 version 实现的乐观锁机制是 Hib...
After the lock is released,Thread-2acquires the lock and checks the seat's status. Since the seat is already booked,Thread-2fails with an exception. Logs: Thread-2 acquired the lock for seat ID: 2 Thread-2 failed: Seat ID 2 is already booked!
异常：程序在运行时出现的不正常现象 Throwable |——Error |——Exception 严重级别：Error类和Exception...