1. When Hibernate flushes a Session, how does it decide which objects in the session are dirty? stackoverflow.comMy understanding of Hibernate is that as objects are loaded from the DB they are added to the Session. At various points, depending on your configuration, the session is flushed. At ... |
2. Unable to create session object stackoverflow.comi used the code hibernate.cfg.xml file of another project. The problem is it ... |
3. How to detach all objects from Hibernate session stackoverflow.comFrom time to time I need to clean Hibernate session. How to prevent LazyInitializationException with obects that are attached to this session? I am searching for something like session.detachAllObjects(). and then invoke session.clear() After this ... |
4. Hibernate: Problem re-attaching existing objects to a new session coderanch.comI asked this question a few months ago and never got an answer, hopefully someone can help me out this time. I think the problem I'm having is associated w/ a bug in Hibernate that's been around for a while: http://opensource2.atlassian.com/projects/hibernate/browse/HHH-511 I've got a setup where my DAO opens a session & transaction and a servlet filter commits and closes (per ... |
5. Hibernate session objects coderanch.comHi all, I wanted to know about the Hibernate Session Objects In my project there are many Hibernate session objects created for getting the connectoion. But they are not closed? Are the objects Lightweight?? Because i am facing some memory consumption problem.The Hibernate objects can be one of the issue. So i wanted to know that should i close all the ... |
6. Hibernate - Configuration and SessionFactory objects coderanch.comHello there, I am developing an ejb3 statless on JBoss, using Hibernate as persistence engine. I now came across the Configuration and SessionFactory objects, that seem to be quite used but that personally I've never explicitly implemented (perhaps due the simplicity of my queries). Well today I've faced an issue which requires the Criteria object and as far as I now ... |
7. Handling objects across different Hibernate sessions forum.hibernate.orgIs there a way to take an object retrieved from one session and somehow associate it with a new session and have that new session process it as if it was the session that it was retrieved with? In case that doesn't make sense (and it doesn't to me as I re-read it!), here's the scenario: I've implemented the interceptor interface ... |
8. Reassociating a disconnected Object with Session forum.hibernate.orgHi, I have an object which has lazy collection properties. I hand this object to the application (a swing app, so now way to keep Session open). When the data from the collection is needed (User expands a tree node), the Object is passed back to the server, where I want to initialize the collections, and pass the object back to ... |
9. Evicting an object from all sessions forum.hibernate.orgIf you mean For each opened session, session.evict(myObject); This is useless since an object cannot be associated with 2 sessions at the same time. If you mean for each opened session, session.evict(myClass); to remove all objects from a particular type, then no, this is not possible. If you mean evict an object from second cache level (jcs), then sessionFactory.evict(myObject); will do ... |
10. Object in Session forum.hibernate.orgHi I am new to hibernate and I am using it to perform a large transaction. My problem occures when I load the same object in the same session and update the second object. This obviously fails. I was wondering if there was any way of determining if a object is already in session, I need to do this by specifiing ... |
11. session get by object method? forum.hibernate.orgIs there a reason there is no get(obj, id) method in the Session API, although there is load(...) like this. The thing is, I made some wrapping API around hibernate and I need the same semantics for load() and get(). Any suggestions (I need a load by object behavior for get()) thanks. Michael. |
12. Wrappering Hibernate Session Object for abstraction ? forum.hibernate.org |
13. What does Session.saveOrUpdateCopy(Object) do? forum.hibernate.orgWe don't think its useful and don't recommend it. It is there for the sake of completeness, since we now aim to be a "complete" ORM solution. It *does* let you avoid the dreaded NonUniqueObjectException, but at the cost of performance. (Actually NonUniqueObjectException is your friend. It tells you that you are risking possible loss of some changes, so in this ... |
14. onUpdate not called when object already part of the session forum.hibernate.org |
15. Session returns objects from an old closed session forum.hibernate.orgQuote: Failed to lazily initialize a collection - no session or session was closed I am using a prepared statement to bulk update the db. After processing, I commit the connection, close the ps, and close the session. For sake of ex, the session obj id is 194. I open a new session, do some similar ps's, closing in the same ... |
16. How can I know if my object is already in Session forum.hibernate.orgI have a detached object ob of class X. I may have an object dbob of Class X with same identifier attached to the session. When I use session.contains(ob); if will return true only if ob==dbob? or if ob.equals(dbob) it will be true? if the first answer is correct how could I check if ob is already associated without hitting the ... |
17. Calling session.close() from Object.finalize() forum.hibernate.orgHi all, My program call session.close() from Object.finalize() method, like this: public class Facade { private Session session; public Facade() { this.session = HibernateHelper.getSession(); } ... protected finalize() throws Throwable { if ( session != null ) session.close(); } } However, the session log the follow message: 5:20:34,249 WARN [SessionImpl] unclosed connection I know that this message happens when the garbase ... |
18. Using objects from one session in a different session forum.hibernate.orgNewbie Joined: Wed Sep 22, 2004 2:01 pm Posts: 9 Hi Hibernators. I would like to know if it's possible to use an object from one hibernate session in a different session. Here is my plan, please let me know if this is impossible, stupid, or a good idea :-) I have a table called "Tests" and it contains info about ... |
19. Detach object from session forum.hibernate.org |
20. Session.get returns 'disconnected' object forum.hibernate.org |
21. Could i pass objects between sessions using session.get() ? forum.hibernate.orgSorry by my english , its my first post ,but the question is How could i pass objects between sessions ? one many many one People ---- PeopleDestiny ---- Destiny Method 1 -> example SessionFactoryDAO sfd = SessionFactoryDAO.getInstance(); SessionFactory sf = sfd.getSessionFactory(); Session s = sf.openSession(); Transaction tx = s.beginTransaction(); People peopleTemp = (People) s.get(People.class, new Long(3)); Destiny destinyTemp = (Destiny) ... |
22. Session is not dirty although i changed an Object forum.hibernate.orgSessionFactory sessionFactory = new Configuration().configure().buildSessionFactory(); Session session = sessionFactory.openSession(); User user = (User) session.createQuery( "from User u where u.name like 'testname'" ).list().get( 0 ); Car carToDelete = null; for ( Car itCar : user.getCars() ) { if ( itCar.getDescription().equals( "BMW ... |
23. moving objects to another session forum.hibernate.orgHello, Due to multiple threads, each one having its own hibernate session, we need to move objects to another session. It doesn't seem to be possible however, I think because of a bug in Hibernate version 2.1.8. What I do is simple (s1 and s2 are two open hibernate sessions): 1. Object obj = s1.get(someclass, someid); 2. s1.evict(obj); // or session1.clear() ... |
24. Evicting objects from the session forum.hibernate.orgHi, I have a question about hibernate detached instances, and then re-attaching them. My simplified sequence of events is: 1) Get the object from the database 2) Update the object 3) Detach the object from the session via the evict() method At this point I would like to re-attach the object back to the session - is this possible? thanks in ... |
25. Does the object chang tracking end when a session is closed? forum.hibernate.orgApologies for not finding this in the documentation - maybe I can't read: During an open session, hibernate tracks loaded object changes, and at the session end (flush) saves modified (isDirty) objects automatically. However, when I use detached objects (i.e. I load my objects in one session, work on then, and then create another session to save them using session.update()), transaction ... |
26. Not able to create object of SessionFactory. forum.hibernate.orgI have encounterd a problem. In my first web application I am not able to create object of SessionFactory, The same application is running perfectly in my friend's computer. it gives me error as below. java.lang.NoClassDefFoundError: org/dom4j/DocumentException com.SaveEmpH.addEmployee(Unknown Source) com.EmpInfoAction.execute(Unknown Source) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) javax.servlet.http.HttpServlet.service(HttpServlet.java:709) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) here my SaveEmpH.java is as below package com; import java.util.*; import org.hibernate.*; import org.hibernate.cfg.Configuration; ... |
27. Problem re-attaching existing objects to a new session forum.hibernate.orgI asked this question a few months ago and never got an answer, hopefully someone can help me out this time. I think the problem I'm having is associated w/ a bug in Hibernate that's been around for a while: http://opensource2.atlassian.com/projec ... se/HHH-511 I've got a setup where my DAO opens a session & transaction and a servlet filter commits and ... |
28. XATransaction enabled session object? forum.hibernate.orgHi, could some one provide some insight or sample code on dealing with XA? Even the "hibernate in action" has no mention of that. We have two XA Transaction enabled JDBC connection pools. assuming we can get two hibernate sessions using these two connections. How do I beginTransaction and commit to coordinate the two databases XA transactions? Thanks in advance, Zuball ... |
29. Detaching objects within a Session forum.hibernate.orgHello All, I need to do the following and im not quite sure how to do it. I need to retrieve an object from the database using "load", once I have the object I want to detach it from the Session (I tried to use evict, but it didnt work!), then change its values WITHOUT persisting it with the Database. If ... |
30. Reusing objects across sessions? forum.hibernate.orgI have the following situation: I have loaded an object of class A (A0), which has several children of class B (B0 and B1), and closed the session in which that happened. In a new session, I now load A1, with children B0 and B2. There are now two different instances of object B0, while I would like there to be ... |
31. Stale object check outside of a session forum.hibernate.orgHibernate version: 3.1.1 Name and version of the database you are using: Oracle 10g I am using Hibernate in a middle tier that communicates with various UIs. I have the need to not only detect stale objects across multiple hibernate sessions (which is easy enough with the "version" or "timestamp" tags in the hbm.xml files), but also from objects that have ... |
32. Reuse of an object reference in the same session? forum.hibernate.org |
33. session.contains(object) forum.hibernate.orgHi, I have the foloowing problem. I reattach an object to the session and some times it says that I am trying to attached an object that already exists. Therefore I used session.contains to check if it exits or not, and some times it does not work, and returns false even if the object its already attached. Any ideas?? Thanks |
34. Hibernate: Session Object Internals forum.hibernate.org |
35. no Session while traversing object graph forum.hibernate.orgHi, Im getting a "could not initialize proxy - no Session" while traversing an object graph and I'm wondering how this could be possible. My situation is the following. I have a 1:n relationship mapped as a set and Im adding a new element. This triggers a hashCode method which starts to traverse the graph and at a certain point the ... |
36. How to detach object from their Hibernate session ? forum.hibernate.orgHi everybody, I'm searching a mean (other thant creating DTO) to be able to detach an object from its hibernate session. In fact, I retrieve an object list each of them containing objects sets and I'd like to force the initialization of those sets. The object list is destinated to be serialized. When deserialized, the session is not available anymore. I ... |
37. getting objects outside a session forum.hibernate.orgSomeone challenged me about how hibernate's LazyInitializationException is stupid. After thinking about it quite some time, I started to think that maybe he is right. Why not allow shirt.getDesigner() to load the Designer object from the database outside the session? It is just a read query. I was so sucked into the application transaction pattern, that I don't have a good ... |
38. How to reload an object within the same session? forum.hibernate.orgHello, I am working on a web based Struts application with MySQL hosted on Tomcat. I use Hibernate 3.1 for my ORM and I seem to have run into a problem. During an operation I retrieve an object from the database and within the same operation I have to retrieve the same object again from the database. The first retrieval works ... |
39. Best method to reattatch an object to session? forum.hibernate.orgHello, I use hibernate/tapestry and have objects stored in an application state object but when I try to access children, i get the lazy load exception. People are suggestion to basically use one of 3 methods to reattatch the object to the session before calling for children objects: session.refresh(Object) (overrides the object if there has been changes maybe? session.update(Object) (saves the ... |
40. How do i make Object detatched from the session and use it forum.hibernate.org |
41. [newbie] Configuration and SessionFactory objects forum.hibernate.orgHello there, I am developing an ejb3 statless on JBoss, using Hibernate as persistence engine. I now came across the Configuration and SessionFactory objects, that seem to be quite used but that personally I've never explicitly implemented (perhaps due the simplicity of my queries). Well today I've faced an issue which requires the Criteria object and as far as I now ... |
42. How to know if an object is in session? forum.hibernate.org |