Question

I have developed a customer maintenance application. Users can alter the customer details via web interface. I want to handle the following scenario:

1. User 1 loads customer1 details.
2. User 2 loads customer1 details.
3. User 1 changes and saves customer1‘s name.
4. User 2 only changes and saves customer1‘s age.

In the scenario above, finally database holds customer1‘s old name and the new age because User 2 overwrites User 1‘s update. I’m using Hibernate. I had heard that Hibernate Automatic Versioning supports this. If any one know how to handle this please advise me.

Answer 1

You just need to add a field annotated with @Version:

public class Customer {

 @Id
 private Long id;

 @Version
 private Long version;

 // rest of the fields, etc.

}

Read this article for more information.