session « Load « JPA Q&A

1. hibernate Open Session in View stackoverflow.com

i am using the following approach to sole lazy initialization problem in hibernate.Pleas tell me whether it will work or not . I have to implement my transcation in my persistance layer ...

2. Lazy loading in Hibernate stackoverflow.com

My Java Web application uses Hibernate to perform ORM. In some of my objects, I use lazy loading to avoid getting data until I absolutely need it. The problem is that ...

3. embeddedId and session.load stackoverflow.com

I have 3 primary keys like in the following example:

@Entity
class User {
  @EmbeddedId
  @AttributeOverride(name="firstName", column=@Column(name="fld_firstname")
  UserId id;

  Integer age;
}

@Embeddable
class UserId implements Serializable {
  String firstName;
  ...

4. Open Session in View Alternate stackoverflow.com

We are in process of developing a web application using stuts2 (mvc layer),spring 3.x (DI ,transaction demarcation,other relevant stuff) and Hibernate 3.x (Persistence). Like any other web application using such or similar ...

5. Hibernate 3.6 - session.get() vs session.load() stackoverflow.com

I am trying to understand what the difference is in returned object and behavior of Hibernate 3.6 session.get() and session.load(). From the javadoc: get():

Return the persistent instance of ...

6. Lazy loads in separate sessions. forum.hibernate.org

Not sure if I can do this or not, but what we essentially want to have at my business is a shared Struts tile that renders result sets in a number of different views (ie, an embedable view). Seems easy enough. Each row of the result is a Hibernate "Business" object and each "Business" object has a one-to-many mapping with a ...

7. 2.1 & JCS & Session.load() forum.hibernate.org

In case anyone is interested this was the problem: Of course Hibernate requires that there be only one java instance of a persistent entity per Hibernate session. Session.load(instance) will not always work well with this requirement because it is trying to bind another java instance to the persistent entity. Before I added the cache, the order of events was: 1. re-associated ...

8. session.load(Object o, Serializable s) forum.hibernate.org

Hello, My table has a composed-id (a compozed primary key)! My class has a method load(Long pk1, Long pk2) and I wanted to load this object, but I didn't find any way, hot to give a compozed id! Anyone any idea? here my code: Code: public void load(Long id1, Long id2) { ...

9. session.evict causes lazy collection to be loaded forum.hibernate.org

Here is my problem: I did a load of an object that has 2 lazy collections. I have not accessed those collections after the object is loaded so I didn't see any Select statements for those lazy collections. Now when I do a session.evict of that loaded object, I see 2 select statements for those lazy collections. When I am evicting ...

10. Lazy Load Open Session Web Application ?!? forum.hibernate.org

Hello Everybody, developers. I`m looking very much forward to hear: In a web application, I`d like to have an open hibernateSession for more than one Thread for a user. (That `d be wonderful in a matter of performance considering the usage of the LazyLoad) I tried to bind the user`s Hibbernate session (opened but disconnected) to his httpSession`s id (key) stored ...

11. Lazy loading problem when using session-per-request forum.hibernate.org

Hi, I am constantly experience problems when trying to lazily load properties of an object. My object overwrites equals and hashcode correctly. When I try to reassociate the object with the current session using LockMode.NONE I get a net.sf.hibernate.NonUniqueObjectException. Correct is, that an Object of this type is already associated with the session, but because I have overwritten equals and hashcode ...

12. Session load vs get forum.hibernate.org

13. Is there any different between session.load and session.get? forum.hibernate.org

get: Return the persistent instance of the given entity class with the given identifier, or null if there is no such persistent instance. (If the instance, or a proxy for the instance, is already associated with the session, return that instance or proxy.) load: Return the persistent instance of the given entity class with the given identifier, assuming that the instance ...

14. session.load() problem forum.hibernate.org

15. Unclosed session after session.load() .... forum.hibernate.org

Damn... i always hit the submit button to fast.... My problem is that im trying to make a very simple load-dosomething-save cycle with hibernate like it is described in the documentation page 65... But both the load and the get method of the session seem to... hmmm... i dont know... somehow the session cant close. I just cant understand why he ...

16. Lazy loading collection through Session.load where lazy=true forum.hibernate.org

Hi Guys, I am using Hibernate 2.1.6. This is a scenario where i would like your help. I have a parent child relationship as 1 to many with lazy loading has been set to "true" in mapping file. So by default if i am loading a parent it wont load children and if i use "fetch" in the HQL it loads ...

17. Session.load problem forum.hibernate.org

hi everyone, I have a problem when load an entity and it's associations. I have a PO named User which has a many-to-many association with another PO named Role. The id of User is username and the id of Role is rolename. There is one User instance identified by roy is stored which has two roles. When I load a User ...

18. what 's different between session.get and session.load? forum.hibernate.org

Assuming you have a lazy (or proxied) domain object, session load will return the proxy (if its not cached) that may possibly represent a record that does not exist in the database. At times this is a great feature but it may be an issue in others. session.get always hits the database (if its not cached) thus you have a good ...

19. session.get vs session.load forum.hibernate.org

The .load method is useful in situations where you "know" the record exists, and you don't want to have to test the return value each and every time you read in an object from the database. You are asserting that the object does indeed exist in the database when you call the method. Think of an application that assigns a user ...

20. Loading lazy assocaitions before session detaches forum.hibernate.org

Newbie Joined: Wed Jun 29, 2005 12:49 pm Posts: 4 Disclaimer: I'm just getting started with Hibernate so this may be very bad (performance wise or other). I thought I would share how I load lazy associations before the session is detached. In the presentation layer, I use a simple InitNode class to make a tree of associations to load: Code: ...

21. session.load and session.get forum.hibernate.org

22. Bizarre session.load?????????? forum.hibernate.org

Beginner Joined: Fri May 13, 2005 9:39 am Posts: 21 Hi, I've got a strange behaviour with session.load. The part of my database that raise this comportement is the following one: Project_Charter references thru Project_Id Project_Activity Each entry in Project_Activity has at least one element in Poject_Charter. The Table project_Charter is the table in which important data of projects are stored ...

23. session.load(Obj obj) matching only obj.someProperty='value' forum.hibernate.org

I have some domain object mapped to a table in db, which has 'deleted_flag' property, designating whether record is logically deleted or not. I want my application consider only 'not-deleted' objects from database, so that it will never be possible to load object with its deleted_Flag=true. At the moment I have to run HQL, similar to the following: "from MyObject obj ...

24. Difference between session.get() & session.load() forum.hibernate.org

session.get is used to create a new persistent object by id from the database. It returns null if there was no such object in the database. session.load is similar except that if there was no such object in the database it throws an exception. session.save on a transient item will assign it a id and make the object persistent: i.e., ensure ...

25. Problem with Session.load forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version: Mapping documents: Code between sessionFactory.openSession() and session.close(): Full stack trace of any exception that occurs: Name and version of the database you are using: The generated SQL (show_sql=true): Debug level Hibernate log excerpt: Hello! I have a strage problem here: I'm following the hibernate manual reference on chapter 1 ...

26. when would you use Session.load versus Session.get? forum.hibernate.org

Christian, I use Session.get to retrieve an object that does not exist, null is returned. If I use Session.load to retrieve the same object, I get back an object which throws an ObjectNotFoundException when I try to access any of its attributes. When would you want an object back when you were not supposed to get one?

27. Problem with Session.Load forum.hibernate.org

It is exactly what H tells you: there is no record with the given ID in the corresponding table. /** * Return the persistent instance of the given entity class with the given identifier, * assuming that the instance exists. *

* You should not use this method to determine if an instance exists (use get() * instead). Use this ...

28. "session.load" followed immediately by "sessi forum.hibernate.org

Hi, I am using Hibernate3.0 (managed by Spring 1.2). I created a persistent instance of a class by loading it from the session (the record corresponding to the Identity value exists in the DB Table). Immediately following the load, i did "session.save(myObject)" and then "session.flush()". Here is the sample code: MyObject myObject = (MyObject)session.load(MyObject.class, myObjectId); session.save(myObject); session.flush(); This resulted in a ...

29. Session get() vs load() forum.hibernate.org

30. does session.load work in hibenate 3.0 forum.hibernate.org

31. load() and get() - session forum.hibernate.org

I read that session is a persistence context, a cache of persistent entity instances. This means that it remembers all persistent entity instances that were handled in a particular unit of work. So when we use the session.load() , Hibernate first checks the persistence context for the current unit of work.And if the entity is found there, no database hits occur. ...

32. Reattach to Session for Lazy Loading. Ajax. forum.hibernate.org

Dear all, I can reattach an individual object to a new session (with Lock or saveOrUpdate or merge) but that doesn't help my lazy-loaded sub collections. I get the dreaded LazyInitializationException. I know this topic has had lots of discussion but I have yet to find a satisfactory answer. I am already using the OpenSessionInView pattern, and this is solving half ...

33. intermittent session.load returns emtpy object forum.hibernate.org

34. session.load not allowed for long parameter? forum.hibernate.org

Newbie Joined: Thu Aug 30, 2007 10:03 am Posts: 8 Hi, i'm a beginner with hibernate, trying to make my first example. So I have written the following code: Code: package hibernatesample; import java.io.Serializable; import java.util.Date; import junit.framework.TestCase; import org.hibernate.HibernateException; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import org.hibernate.classic.Session; import org.hibernate.tool.hbm2ddl.SchemaExport; /** * Einfacher Test, der CRUD mit Hibernate demonstriert. */ public ...

35. Session.load / Session.get and NonUniqueObjectException forum.hibernate.org

UID i = new UID(4); IActivity firstActivity = (IActivity)IdentifiableDAO.getInstance().load(Activity.class, i); IActivity secondActivity = (IActivity)IdentifiableDAO.getInstance().load(Activity.class, i); if(firstActivity!=secondActivity) { System.out.println("This is weird"); }

36. session.load confusion forum.hibernate.org

I have some doubts regarding session.load.plz help me in resolving them. According to the api it works as First, an attempt is made to load the entity from the session-level cache. If not found there, an attempt is made to locate it in second-level cache. Lastly, an attempt is made to load it directly from the datasource Now I have my ...