How to implement spring boot pessimistic lock and which approach is better optimistic lock or pessimistic lock?

Question

1. Setup version on entity class

   @Column(name = "VERSION") @Version private int version;

   }

2. entityManager.find(getActiveUsers.class, 1, LockModeType.OPTIMISTIC);

Answer 1

I was able to achieve optimistic lock using @version on my entity class. which approach is better?