eager « Load « JPA Q&A





1. Hibernate lazy loading + Jersey REST = eager loading?    stackoverflow.com

I'm developing a Client-Server-Application with Hibernate as persistence layer and Jersey REST for network communication. Given a user with roles:

  1. when I want to display all users in the client, I don't ...

2. Hibernate Lazy using Initilize or EAGER loading    stackoverflow.com

I have three tables,

users
user_associations
association_type.
Users are associated to each other through the users_associations table and then the association is given a type such as PARENT, or FRIEND, etc.. When I call my ...

3. Hibernate lazy load and eager load    stackoverflow.com

What is the difference between Lazy-Load="false" and eager loading , I am not getting the proper anywere , please let it me know

4. Hibernate - lazy vs. eager loading    coderanch.com

Hey all-- I'm new to this forum (and actually to JavaRanch in general)! Any best practices/etiquette advice is always welcome. My group is using Hibernate for our current project. This is my first time using the tool and I have some questions regarding lazy vs. eager loading. In the hbm files, there is a 'lazy' attribute which allows one to specify ...

6. Using eager and lazy loading    forum.hibernate.org

I've encountered some seemingly counter-intuitive behavior when mixing eager and lazy loading of associations. Consider these entities: Code: @Entity @Table(name = "parent") public class Parent { @Id @Column(name = "id") private Long id; @OneToMany(mappedBy = "parent", fetch = FetchType.EAGER) private List children; ...

7. Collection being eagerly loaded, even though lazy = true!    forum.hibernate.org

Hi guys, I have been breaking my head with this issue for the last weeks and I thought that you guys could give me a hand here. The problem is that I am trying to lazy load a collection, but it gets eagerly loaded all the time, making a huge impact on my app performance. Here its the scenario, I describe ...

8. (Deep) Eager loading in Hibernate    forum.hibernate.org

Hi, i'm quite new to Hibernate, and after reading Chapter 11 from the Hibernate documentation, i wonder if Hibernate also supports "deep eager loading". I want to read a net of objects starting from root object as fast as possible. From my experience the performance of such a reading is (as a first approximation) direct proportional to the number of SQL ...

9. Need to load for than one collection eagerly    forum.hibernate.org

My object model consists of a Step object which contains a collection of sub-steps and a collection of assistance. Step and sub-steps have a one to many relationship. Step and client assistance have a many to many relationship. In my application a user always gets the sub-steps, but he/she might also request the client assistance. So in my query I am ...





10. unwanted eager loading    forum.hibernate.org

Newbie Joined: Mon Dec 27, 2004 10:23 am Posts: 7 Read the rules before posting! http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version: 2.1.7c I get the following error when attempting to load the groups of a user using user.getGroups(). I suspect this is due to the bizarre generated sql that is shown below. One can see that the usermetadata table/class is involved. however, ...

11. EAGER loading    forum.hibernate.org

Hibernate version:3.0 All, Is it possible to eagerly load associations of an object. Let me explain in detail: EntityA has a set of EntityB EntityB again has a set of EntityC objects. I am loading an(one) EntityA object using Session.load(EntityA.class, new Long(1L)). When EntityA is loaded, i use filter () & eager loading ( i.e lazy=false ) to load a selected/filtered ...

12. lazy AND eager loading    forum.hibernate.org

I have two applications connected to the same DB. For the first, data mostly goes in (think data entry). For the second, data comes out (think reporting). The first application is finished, and all POJO's amd HBMs used for persistence are in a seperate jar. If both apps use this jar, they must both have the same eager/lazy configuration. I want ...

13. Duplicate entries with eager loaded collections    forum.hibernate.org

Hello, My name is Christian Sprajc and I'm working for a software company which creates logistics software ( http://www.riege.com ). Currently we migrate our persistence layer from ejb2 to Hibernate. In this process we discoverd a strange bug in the eager loading of collections. We like Hibernate, because it greatly simplifies our O/R-Mapping. We have to use Eager initalizing of Collections, ...

14. Lazy loading eager loading    forum.hibernate.org

I have an object that has children. class Parent { List children; } The children are lazy loaded. But I want them to be all loaded or none loaded. I do not want them loading one at a time. And I do not want them automatically loaded every time I load "Parent." What is a good strategy to force all the ...

15. full eager loading    forum.hibernate.org

16. Eager loading object with multiple sets    forum.hibernate.org

Hello, This question has been asked multiple times on this forum but nobody seems to have a clear answer. I have a class (A) which has 3 sets of other classes (B, C and D) (one-to-many). These classes have a many-to-one relationship with another class (E). Code: B ...





17. Eagerly loading collections    forum.hibernate.org

I have the following class: public class Project { private List organisations; private List contacts; I have lazy loading turned on for performance reasons. If I get a single project by it's ID though, i'd like to eagerly load the collections of organisations and contacts. Something like... from Project as p left join fetch p.organisations left join fetch p.contacts ...

18. @CollectionOfElements doesn't load eager    forum.hibernate.org

Hello, i'm using following mapping: Code: @CollectionOfElements(fetch=FetchType.EAGER) @JoinTable(name = "SCHEMA_ENTRY", joinColumns = @JoinColumn(name = "SCHEMA_FK", nullable = false)) @MapKeyManyToMany(joinColumns = @JoinColumn(name = "ENTRY_FK", nullable = false), targetEntity = NotificationSchemaEntry.class) @Column(name = "ALLOWED") @Target(NotificationSchema.class) @Cascade({ALL,DELETE_ORPHAN}) @Fetch(FetchMode.JOIN) ...

19. Lazy loading then eager hasn't any effect    forum.hibernate.org

20. Eager loading of collections.    forum.hibernate.org

Newbie Joined: Fri Dec 05, 2008 3:36 pm Posts: 3 I have a one to many association (line item ==> discounts) that I am trying to eagerly fetch in a single select statement. The documenation states that by enabling "fetch=join" you can eagerly fetch all of the line items and their associated discounts in a single select statement. Enabling "fetch=join" in ...