1. Dirty flag within hibernate stackoverflow.comHow does hibernate maintain a dirty flag for an object that is mapped to a Database table, such that the framework will issue an actual database update only if something has ... |
2. What does hibernate think is "dirty" here? coderanch.comI can't select a simple list of objects w/o an update happening for each record in the List...and I can't put my finger on *why* this would be happening. ...the Order mapping: |
3. automatic dirty checking in hibernate coderanch.com |
4. Hibernate Dirty checking not performing as expected coderanch.comHello all, I have a threaded application that can make multiple changes to single rows/fields and the final change is not being persisted through dirty checking. Examples: Row 1 has change A made to it. Change A is not persisted Row 2 has change A made to it, then change B. Only change A is persisted This is a very heavy ... |
5. PersistentSet recognized as dirty when it is not forum.hibernate.org |
6. Dirty Checking Algorithm ?? forum.hibernate.orgHello, This is just a general question for getting more familiar with Hibernate System. How Hibernate manage for dirty checking? As in JDO, those people maintains a bitsets with every object and used to set the bit from every mutator method. And before saving, they ask from statemanager for dirty status of any bean, based on this bitset. Is there any ... |
7. Dirty checking forum.hibernate.orgThis question may sound too simple ..Anyways I have read Hibernate provides dirty checking. But how do I implement it. In the reference guide different optimistic locking strategies are mentioned like all, dirty , none , version . Can I specify this on primtive types ? Also, it again involves some performance issues, So can anyone throw light on whether this ... |
8. Dirty checking forum.hibernate.orgI want to check if a detached persistent instance has been changed since it was loaded from the database. Can Hibernate do this for me? or do I have to load another instance from the database and perform a manual field-by-field comparison in memory? I tried using Session.lock with LockMode.NONE and LockMode.READ and passing it the modified transient instance. I expected ... |
9. Dirty checking - is it configurable? forum.hibernate.orgI am running tests out of the "Hibernate - A Developer's Notebook" and there is a Track class that has a few attributes and I updated one of those attributes (volume) within a session, after I have queried for all the Track classes within the database. With dirty checking, are all the fields supposed to show up in the update statement ... |
10. Propage changes using "dirty" across cluster qu??? forum.hibernate.orgHi, We'd like to use Hibernate's cache to, effectively, propagate changes across our cluster which shares a database. If we update an object on one server and do a save to update the database, will the other servers see a "dirty" situation for this object and perform a read on the database, thus updating themselves? cheers, David |
11. Automatic Dirty Checking forum.hibernate.orgI feel like I may be missing something. Due to hibernate's success I am sure that my thinking must be flawed, when it comes to this automatic dirty checking process. I am using the Springframework with Hibernate 3, and I am using a SessionPerRequest pattern. So any object that I retrieve through load(),find(), etc... the object is in a persistant state, ... |
12. Processing Dirty Regions forum.hibernate.orgHi, I have installed Eclipse 3.1 and then Installed latest JBOSS IDE files through update. Then i downloaded hibernate tool "hibernate-tools-3.0.0.alpha4a" and placed it in plugins directory. Now the problem is whenever i edit any XML file, i have an error screen of Eclipse saying "Dirty Processing Error". Will someone guide me what to do to get rid of this error? ... |
13. disable dirty checking in hibernate forum.hibernate.orgi have a serious dirty checking problem when ever i am selecting some rows from a relation it is automatically doing some updations on the table. i checked with queries it generated. i checked by removing transaction then also the result is same can we set any property in hibernate to disable dirty checking... can anyone help me with this |
14. Automatic Dirty Checking not working... forum.hibernate.orgHibernate version: 2.1.8 Mapping documents: Code: |
15. Support a way to turn off automatic dirty checking. forum.hibernate.orgPreviusly at JIRA: Jose Peleteiro: Automatic dirty checking is a nice features, but at the old-fashioned design (dao.new(), dao.save()) it's not nice. It may be possible to turn it off at configuration file. Christian Bauer: Use a stateless session, read the documentation. Jose Peleteiro: StatelessSession does not solve that problem since cache, cascade, event-model, listener, lazy-load... will not work as well. ... |
16. Should PersistentSet.add(...) always mark the Set as dirty? forum.hibernate.orgpublic class User { private Set roles = new HashSet(); ... public void addRole(Role role) { // calling add() should not modify the Set if role is a duplicate if (roles.add(role)) { ... |
17. What does hibernate think is "dirty" here? forum.hibernate.org |
18. Dirty checking forum.hibernate.org |
19. Automatic dirty checking implementation forum.hibernate.orgHello All, I was wondering if someone could point me towards some documentation on how Hibernate implements automatic dirty checking of objects. Since Hibernate does not force objects to have proxies, it probably isn't using interception, so I'm wondering if it compares the value of every property for every object against what was originally in the database when the object was ... |
20. Strange dirty checking forum.hibernate.orgI have a strange problem with hibernates dirty checking. In my entitybean ex product i have a getmethod for ex price like getPrice(){ return this.price*2; } Then hibernate thinks this object is dirty and updates the object with the result of this.price*2 but the value of this.price is never changed. All I do is to call the getmethod which have a ... |
21. Dirty check forum.hibernate.orgYes, but how is it compared? Field by field, getter by getter, equals, hashcode..? My problem is that my entity gets not updated although I changed a field value like this: @Transient private String a; private String b; void setA(String a) { this.a = a; this.b = computeB(a); } Thus it seems that if b is not changed by setter setB(), ... |
22. automatic dirty checkig forum.hibernate.orgHi, This is my view. On the brighter side ( using Automatic Dirty Checking ) i) We rely on somebody else to persist the changes made by us without really being concerned with, a) when to do it ? b) how to do it ? ( selectively update columns etc. ) ii) The Less we Code, Lesser are the Bugs introduced. ... |
23. byte[] being always marked as dirty forum.hibernate.orgI am having a problem when I am loading an element from the database which was saved as a byte[ ] . It is always marked as dirty when it is reloaded. In the org.hibernate.type.TypeFactory class when the findDirty method is called the "currentState" variable has a byte [ ] (as expected) while the "previousState" has a Byte[ ]. The contents ... |
24. Dirty checking using hibernate API ? forum.hibernate.orgHi, I'm using JPA backed by hibernate 3.2.6. What I would like to do is discover whether a managed entity is dirty prior to flushing the session. Does hibernate provide such an API ? To my knowledge, no. There is only a session.isDirty() which doesnt really help to tell whether a specific entity is dirty. I looked at @PreUpdate entitylistener but ... |
25. Empty Embebbed marked as dirty forum.hibernate.orgHi, Seems like Hibernate does not properly handle empty Embedded (embedded with all properties set to null). Every time we read from the database the object with null Embedded, it gets marked as dirty because our Entity creates instance of the Embedded but not making any assignments to its properties. That translates into database update after each read. Thats what the ... |
26. Access to Hibernate's "dirty checking" feature? forum.hibernate.orgThere is the Session.isDirty() method, but it doesn't take any parameter and I suppose it checks every object in the session. It may be possible to do something with a custom interceptor though. The idea I have is that the session is create with an interceptor that implements the findDirty() method. The normal operation is to return null to make Hibernate ... |
27. Disabling dirty autocheking forum.hibernate.org |
28. how to prevent dirty checking and and deep copy forum.hibernate.orgIs there a way to prevent dirty checking of entities and the deep copy of components? Here some background: We are using hibernate for a specific implementation of a 2-dimensional historization framework. The framework takes over responsibility for - dirty checking, i.e. the framework knows when an entity has been changed and when it's new - assigning ids, i.e. we are ... |
29. dirty ckecking in hibernate!! forums.oracle.comIt could use Class.forName(), though I think it uses a better controlled method, calling loadClass on a ClassLoader. But that's not considered as reflection. Reflection allows you to access methods and fields of a class given their names at runtime. This allows hibernate to load a class, create an instance of it, and then call a method given the name, even ... |