data « Transaction « JPA Q&A





1. concurrency (stale data) problem in JPA    stackoverflow.com

Let's say I have methods with following signature

Object getData(int id) {  
  //create a entity manager
  //get data frm db
  //return data
}

updateData() {
  Object obj = ...

2. @ManyToMany inconsistent data on both side problem    stackoverflow.com

I have a blog-like scenario , with two Java classes : Post and Tag , which is a @ManyToMany relationship , with a Post_Tag association table , here is my simplified ...

3. Can't persist my data with hibernate    stackoverflow.com

I'm geting started with Hibernate and try to save some data into my DB from a web app. My servlet code is here:

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 ...

4. Hibernate retrieves OLD data after transaction insert    stackoverflow.com

I am using Hibernate in Spring MVC 3.05 and an Oracle database. I have a transaction in which I insert a new record into two tables: User and Registration. Registration contains a UserId ...

5. How can i defind in persistence.xml?    stackoverflow.com

How can i define <non-jta-data-source> </non-jta-data-source> in persistence.xml? My project runs well in Tomcat 6 and Tomcat 7. now i am using

  1. Struts 2
  2. Spring 3.0.5
  3. JPA 2
  4. Jboss 6
my persistence.xml looks likes this
  ...

6. Will Hibernate also rollback its data objects?    coderanch.com

Hi all, In hibernate, if we do some value changes on the hibernate data objects and trying to update them into database by calling session.update method. If at this point of time, the database exception occurs, we will call Transaction.rollback. This, I believe, will roll back the database to the original state, but will it also roll back the data objects ...

7. Viewing data after Hibernate transaction is committed    coderanch.com

I have a Hibernate transaction where I'm reading and modifying data. Upon successful completion of this modification, I need to send out some notifications using this data. Basically, I want to continue to be able to read the data that's stored in memory after it's already been committed to the database. I don't need to change it. Is there an easy ...

8. Data is not inserting without transaction commit option!!!    forum.hibernate.org

Hello All, I created a simple hibernate project where I am inserting a row into database table. But it insert the data only when I use org.hibernate.Transaction commit. If I dont use transaction commit It neither insert any thing in to database nor show any error on console. My hibernate config file is Code:





10. Data not updating immediately after flush in transaction    forum.hibernate.org

// parent class public class Parent{ ...... private Set childs = new HashSet(0); private Set friends = new HashSet(0); public Set getChilds() { return this.childs; } public void setChilds(Set childs) { this.childs = childs; } public Set getFriends() { return this.friends; } public void setFriends(Set friends) { this.friends = ...

11. A question regarding data concurrency and versioning    forum.hibernate.org

Hi, Suppose I have a server and multiple clients (running on different JVM and have their own Hibernate service) and all the clients have loaded the same data object tree to their JVM and are able to modify the data object tree anywhere/anyway they wish. The problem occurs at the data concurrency synchronisation, as a client persist the modifications made on ...

12. Stale data no detected with optimistic locking    forum.hibernate.org

Author Message OliverPlunkett Post subject: Stale data no detected with optimistic locking Posted: Sun Oct 03, 2004 4:43 am Newbie Joined: Sat Oct 02, 2004 4:53 am Posts: 3 I have been playing with Hibernate's optimistic locking with versioning and I have found a certain behaviour and I would like to know whether this is Hibernate's expected behaviour. I ...

13. how to handle classic dual update data locking issue    forum.hibernate.org

we have a web appliation using stateless session beans which hit an oracle database. we're interested in solving the issue where user 1 brings up and order update page, and then user 2 brings up an order update page for the same order, user 2 changes data and submits the changes, then user 1 changes data and submits the changes. right ...

14. Difference in commiting data and transactions?    forum.hibernate.org

Hibernate version:2.13 We are using some code that is explicitly flushing - which we have seen takes a while - which makes sense. We are not currently using a transaction in the instance, but instead //session.flush(); --This taking a while for a relatively simple operation session.connection().commit(); However when we access the db from another source we cannot see the records, but ...

15. transaction data    forum.hibernate.org

Hi all, I want to manage the transactions and I wonder if I can do this via hibernate classes only. for each user source operation, I create a transaction and add this to the transaction pool but I do not commit the transaction until the user press "commit changes". So far so good, after user commits changes, then click "rollback changes", ...

16. Insert, commit, no exceptions, but no data either    forum.hibernate.org

Hi My problem is that the log looks o.k. with insert statement and commit, but nothing is written to the DB. No exceptions occur. The DB is created with lck, log, script, and properties file. I can open the DB, but it's empty. Hibernate version: 3.1.2 Code between sessionFactory.openSession() and session.close(): Code: Session session = HibernateUtil.getSessionFactory().openSession(); ...





17. direct jdbc changes are not committed to data base!    forum.hibernate.org

Environment: Tomcat 5.5.12 (no JTA) JVM: Sun JDK 1.5.0_6 Database: Oracle 10g 1 I've got a problem with Hibernate 3.2rc2 + Hibernate Annotaions 3.2 rc1 (when I'd used Hibernate 3.0.5 in my previouse project there was not such a problem): In both projects (my current project and previous project) I called session.connection() to get the current connection, and then used it ...

19. Problem with LOCK-ing data    forum.hibernate.org

I have problem with locking some record from ORACLE 9i DB. I create Entity Bean, Session Bean in JDeveloper 11g. My Persistant_Unit is: Code: org.hibernate.ejb.HibernatePersistence ...

22. Hibernate transaction with large data amount    forum.hibernate.org

u have to use batch processing for large data access from hibernate. First set the jdbc.batch_size property to any number b/w 10 to 50 in hibernate.cfg.xml file. if u r saving & update more no. of objects into DB. then check the loop index for batch size if it reaches that flush() and clear() the session. Actually batch processing used for ...

23. Hibernate::Data perist before commit    forum.hibernate.org

I am using Hibernate Transaction and the code is sessionFactory.getCurrentSession().getTransaction().begin(); i have started transaction but problem is that i have inserted 2 rows with my code but in 2nd row some data is wrong so exception occurs but first row inserted successfully and second not i suppose transaction is commited but i commited the transaction after for loop.i think hibernate persist ...

24. Loss of Data in transactions in the hibernate    forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version: Hibernate 3.1 Mapping documents: Hibernate Mapping DTD 3.0 Code between sessionFactory.openSession() and session.close(): /** * Retrieves the current Session local to the thread. *

* If no Session is open, opens a new Session for the running thread. * * @return Session */ public static Session getSession(String ref) ...

25. Transaction gets Commited when data is Flushed    forum.hibernate.org

Hi, I am new to Hibernate and I am facing this weird issue of Transaction getting commited whenever the data is Flushed. When we do an Insert/Update operation and execute a query, data gets flushed automatically as the FlushMode.AUTO is set by default. At this stage, Transaction is getting commited which is causing serious issues in our application. Is this an ...

26. TableHiLoGenerator causes other session data to commit    forum.hibernate.org

Newbie Joined: Fri Jun 12, 2009 12:41 pm Posts: 1 Use case is: 1. Start transaction 2. Persist other classes (Domain, User, etc) which has @Id @GeneratedValue 3. Persist class Message which has @Id @GeneratedValue(strategy = GenerationType.TABLE, generator = "KEYSTORELCALL") @TableGenerator(name = "KEYSTORELCALL", ...) 4. Rollback transaction Result is that the data in step 2 is still in the database. I've ...