TransactionalrollbackFor = Exceptionclass

The @Transactional annotation is used in Java to define the transactional behavior of a method or class. In this specific example, the @Transactional annotation is used with the rollbackFor attribute set to Exception.class.

The rollbackFor attribute specifies the types of exceptions that should trigger a rollback of the transaction. In this case, it is set to Exception.class, which means that any exception (including checked and unchecked exceptions) will cause the transaction to be rolled back.

By default, transactions in Spring are only rolled back for unchecked exceptions (i.e., subclasses of RuntimeException and Error). By specifying rollbackFor = Exception.class, the transaction will also be rolled back for checked exceptions.

The @Transactional annotation can be applied to methods or classes. When applied to a method, it means that the method will be executed in a transactional context. When applied to a class, it means that all public methods of the class will be executed in a transactional context.

In summary, the @Transactional(rollbackFor = Exception.class) annotation ensures that any exception, whether checked or unchecked, will cause the transaction to be rolled back