1. updating same object but don't want StaleObjectException for certain cases stackoverflow.comConsider this hypothetical scenario (I have the real requirement like this in business) - I have two entities called Employee and Department as follows - |
2. Implementing object versioning with Hibernate coderanch.comHi, I'm trying to implement multi-version object store with Hibernate. The way the system works is storing a new row each time an object is changed and flag the latest object version. This way when you query for all cats I add to the query where clause "and last=true" and only the latest version of each object is fetched. There are ... |
3. Adding version to an existing object forum.hibernate.orgWe're adding versioning to several of our objects so that we can do optimistic-locking on our writes. Granted, we should have done this from the start. But... since it would be really expensive in our production databases to set version = 0 for all of the rows, I'm wondering if there is a nice way to handle the fact that at ... |
4. version control and multi-threaded model object modification forum.hibernate.orgI have added a version column to one of my model objects (and added the @Version tag). My application is multithreaded and when two threads try to modify the same model object in the same time, only one will succeed (which is what the versioning guarantees). Now, there are cases where the two threads are modifying two completely different columns and ... |
5. version counter increased even object has not been changed forum.hibernate.orgWe use Hibernate on backend inside JBoss. We use stateless session beans with a smart client. Hibernate config contains for all entities select-before-update=true and dynamicUpdate = true. We use optimistic locking via a version column per entity. Still when I use saveOrUpdate on an entity read by the server, transfered to the client, resend to the server, the version counter of ... |
6. saveOrUpdateCopy not updating version on object? forum.hibernate.orgHibernate version: hibernate-2.1.7c Mapping documents: Code: |
7. One-to-many association to LATEST VERSION of object forum.hibernate.orgHi, I'm stumped with the following (seemingly trivial) problem: I have a one-to-many association ("Order" to "Item"), and I'm using a versioning scheme for non-destructive updates -- so each object has a primary key comprised of the ID and the VERSION. When an Order is retrieved, I'd like to have its "items" array populated with just the latest version of each ... |
8. Object Versioning Best Practice forum.hibernate.orgIs there a best practice for storing versions of objects? I have a user configuration object that I want to be able to persist. There will be one active object, but many previous ones reflecting the state of their configuration at that point in time. When the user makes updates to their configuration, I want to make a new version of ... |
9. versioning not working (no stale object thrown) forum.hibernate.orgI can't seem to get my optimisitic lock= version to work. I created a simple jsp to just edit the track title. To test, I use 2 seperate browsers (IE and Firefox). Steps taken (with User A and User B): A) editTrack.jsp?id=1 B) editTrack.jsp?id=1 -- At this point they are both looking at the same row in the DB. A) edits ... |
10. Advise: Looking for some kind of object versioning solution forum.hibernate.orgI'm looking for a way to retain a copy of an object and yet tie it to the original object. The best word I can use is versioning objects so I can see their history. The only way I've thus far figured out how to do this is to create a composite id consiting of an 2 incremented numbers so that ... |
11. Hibernate based Object Version Management forum.hibernate.orgHi, I'm wondering if somebody know an existing framework allowing to version control objects stored in DB and to allows functions such as: - baseline - branch - checkin - checkout - revise - ... If no tool exists, I'm wondering what is the best solution... I'm planning to somehow *tag* the versionable objects. In that case, the hibernate mapping of ... |
12. No good way to resolve object version conflicts forum.hibernate.orgI'm using v3.2.0, and running into a basic problem which surprisingly has had very little discussion here or elsewhere. Short blurb: When you use versioned objects, once you get a StaleObjectException you are hosed. Your objects are all gone; you have to evict and reload them all again from the DB explicitly and integrate changes manually, which is horrible design. Am ... |
13. NullPointer on version increment when reattaching object forum.hibernate.orgUsing Hibernate 3.2 Hi, When I load a serialized version of a detached object and attempt to update it in another session I always get the following error: java.lang.NullPointerException at org.hibernate.type.IntegerType.next(IntegerType.java:59) at org.hibernate.engine.Versioning.increment(Versioning.java:108) at org.hibernate.event.def.DefaultFlushEntityEventListener.getNextVersion(DefaultFlushEntityEventListener.java:358) at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:250) at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:121) at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)....et etc etc I can see from looking at the entity that it has a null version but shouldnt hibernate check ... |
14. location of @Version influences object recreated/updated? forum.hibernate.orgBeginner Joined: Mon Nov 13, 2006 8:22 am Posts: 28 hi, I'm migrating a small webapp to hibernate annotations and am currently facing a strange problem. I have following User model object (as test code): Code: @Entity @Table(name = "TLUSER") public class User extends AbstractEntity { //AbstractEntity just contains some abstract methods private Long id; [b] ... |
15. Object Versioning forum.hibernate.orgHi, Is there any work (or any interest in working) on object versioning? This would be a system for tracking changes to a persisted object. An API for it would allow taking a snapshot of an object at a certain point in time (or version). Configuration for it would include fields that would trigger the taking of a snapshot. Anything like ... |
16. Keeping track of object versions with Hibernate forums.oracle.comHello, my problem is the following: I'm doing a project at work where I'm basically introducing a database with hibernate where we previously used mostly text files and what not. The database will contain data used by several client applications, so I'm in the process of creating a central server that uses hibernate for the database communication and there's a small ... |