Hibernate concurrent update version

How this problem is handled in java with hibernate? Please help me to get this situation handled in proper way. Add a comment. Active Oldest Votes. So let me ask. I guess the backing bean is stored in session, and thus displays stale data.

In spring MVC, struts and all for every view there will be a backing bean like java class controllers I mean. Show 4 more comments. Pokuri Pokuri 3, 7 7 gold badges 29 29 silver badges 53 53 bronze badges. When the object is flushed by Hibernate the version is automatically incremented — so the developer does not need to increment this property. You can use this approach if your application has low-concurrency and skip version control.

In this case always the last commit wins and the object is updated according to that state. And this is why it is required to always load the actual state of the entity from the database prior manipulating it. As the documentation states this annotation can be used for following types: int, Integer, short, Short, long, Long, java.

If some updates happen between loading the entity and flushing it back to the database you get an error message from Hibernate:. Book 1]. Above I have mentioned some lock modes and how to set them, now it is time to see them in action with some example code. The block above does two things: loading the entities from the database setting a lock mode for forcing the version incrementation and then it prints out the books to the console. The result would be something like the following:.

The result of printing the books to the console after loading them with this repository method could be something like this:. The version numbers are updated only in the current session until you update the entities and save them to the database.

Show 2 more comments. Active Oldest Votes. Upgrade , so open it again before the rollback: if session. Equals ConnectionState. Open ; session. Rollback ; This works and I could do further transactions with the same session. Why the connection is closed in the first place remains a mystery to me!

And I wonder if this behaviour is common to other all? Add a comment. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Active 4 years, 4 months ago. Viewed 37k times. Andrei Petrenko 3, 3 3 gold badges 29 29 silver badges 53 53 bronze badges. Rakesh Goyal Rakesh Goyal 2, 7 7 gold badges 35 35 silver badges 69 69 bronze badges. Add a comment. Active Oldest Votes. Optimistic When using optimistic locking, you map a special attribute a number, a timestamp as a version so you actually have a column for it.

References Hibernate Core Reference Guide Optimistic concurrency control Pessimistic locking. Pascal Thivent Pascal Thivent k gold badges silver badges bronze badges. Chaitan Yadav Chaitan Yadav 9 9 bronze badges. Bruno Bruno k 27 27 gold badges silver badges bronze badges. More on versioning in Hibernate A general but simple guide. Lars Andren Lars Andren 8, 6 6 gold badges 35 35 silver badges 55 55 bronze badges. Sign up or log in Sign up using Google.