Updating in hibernate
When you traverse from the “Many” side to the “One” side, you only need to make reference to one object, which is why the instance variable. However, when you traverse from the “One” to the “Many” side, you will need to hold a reference to MANY objects. Many-to-One equals one reference, One-to-Many equals many references. I want to have a sleep timer to put my computer to sleep after an hour of inactivity but still want any downloads or computer updates to be installed.will they continue even if the computer is on sleep mode?The example we will use is the relationship between an object and not vice-versa. As I mentioned, we previously used the import org.hibernate. Session Factory; import org.springframework.beans.factory.annotation. I’ve set up the test code in a Controller class, I’ll include all of the code for the sake of completion, but all you really need to be concerned with is how the code inside the import Set; import org.springframework.beans.factory.annotation.
The key to this is that the call to session.lock() associates the entity with the session and also sets the initial state.
Modifications made after this are detected and if dynamic-update="true" only the modified properties are included in the SQL.
I tried it once and it worked for simple properties, but it felt a bit unsafe with collections and associations, so I gave up the idea.
Hibernate will automatically changes and save them to the database.
No need to call save Or Update() or any other method.update your save Orupdate method like thispublic T save Or Update(T entity) and keep the dynamic-update=true, and you won't need that select-before-update on your mapping. But I think if you have to enable optimistic locking, this won't work.