1. What are the main problems when using hibernate lazy loading? stackoverflow.comI've heard several times that several problems arise in hibernate (especially when using lazy loading). Which are the most common and what can be done about them? |
2. Hibernate Lazy Loading problem coderanch.comI am laoding a complex domain object using hibernate at startup and storing it in a secondary cache. To load the object, i open a session, retrieve some data and close the session. As the object is complex in nature, there are certain associated objects which are lazily fetched. These objects might be accessed at a later stage under specific business ... |
3. Hibernate Configuration Loading Problem coderanch.comHi All, In my first program integrating Hibernate and Spring I have encountered the following exception: Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mySessionFactory' defined in class path resource [beans.xml]: Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.hibernate.cfg.Configuration]: Constructor threw exception; nested exception is java.lang.NoSuchFieldError: INSTANCE at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1337) I have put ... |
4. Lazy loading problem forum.hibernate.orgHi All, I have a PO table for purchase details which contains a column for storing carrier. I store carrier id in the column and this can be null because some PO may not have carrier. I have created entity PO as shown below. When I try to display the list of PO I am getting an error javax.persistence.EntityNotFoundException: Unable to ... |
5. Problem with lazy loading forum.hibernate.orgHi all, I have a problem, my code is: @Entity public class A{ @ManyToOne(fetch = FetchType.LAZY, targetEntity = B.class) @JoinColumn(name = "b_id") public B b; } @Entity public class B{ private String id; private String description; } I have a service method: public A XXX(A a){ //Search Entity A oldA= this.findById(a.getId()) //Load Entity this.loadA(oldA);//FROM A LEFT JOIN FETCH a.b WHERE A.id=:id ... |
6. problem loading configuration with set forum.hibernate.orgNewbie Joined: Mon Sep 08, 2003 12:16 am Posts: 9 I'm having a problem with my configuration loading when I use JUnit. Everything is fine when I run my app normally, through Tomcat. The same problem occured with Tomcat before I upgraded from 2.02 to 2.03. I don't know what the difference could be, both just call: new Configuration().configure() Here is ... |
7. Lazy loading problem forum.hibernate.orgI can't speak to the feasibility of implementing plugging support for proxy generators. However, it seems to be that the focus for Hibernate is OR mapping. It does that very very well. What you are asking for is not OR mapping functionality; it is getting more into the realm of application frameworks. I will say that at the time I moved ... |
8. One-To-One load() problem forum.hibernate.orgBeginner Joined: Fri Sep 12, 2003 12:54 pm Posts: 20 Hi, I've got an issue where my child entities aren't getting loaded (but save/update is working). Here's a quick synopsis of my objects: Code: [Cart] --one-to-many--> [LineItem] --one-to-one--> [CartItem] [CartItem] has joined-subclasses [CartCatalogItem] and [CartPunchOutItem]. The one-to-many between Cart and LineItem have cascade="all-delete-orphan" and the one-to-one between LineItem ... |
9. Problem with load forum.hibernate.orgHi, I have a problem with the method session.load(class, id), I have a ClassCastException when I call a method see the Exception : java.lang.ClassCastException: java.lang.String at genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization$$EnhancedByCGLIB$$0.getHybridization_id( |
10. Object Loading Problem forum.hibernate.orgHi , Mapping file work fine will inserting and updating the record , but gives problem will retrieving Objects. Explanation : - It gives me trouble while loading TCx1PtsiteT object . 1. while loading TA3PatientT object using TCx1PtsiteT object . Description :-In database Tables TA3PatientT and TCx1PtsiteT have one-to-one relationship on Composite Id.TCx1PtsiteT have many-to-one relationship with TCx1ParticipantM & TCx1PatientT Here ... |
11. Problem while loading an object with a lazy loading set forum.hibernate.orgHi, I use a persistent object A which has a set declared with lazy initialization. It works perfectly usually, but there is one bad case: * i create a new object A (new) without setting the Set values * i save it * i forward to another servlet action * this action loads the objet * the returned object is exactly ... |
12. One-to-One loading problem forum.hibernate.orgHi, When I try to load child using parent which have one-to-one relationship , it throws an exception. My hbm looks like this |
13. Problem Loading an Object forum.hibernate.orgBeginner Joined: Tue Nov 11, 2003 5:15 pm Posts: 23 This happens sporadically with different data, also note while loading jobposting object only for qual child object insert and delte sql is executed but not for parent object and not for another child costcenterset. I have seen similar insert and delete problem many times when a boolean field has null value. ... |
14. loading problem forum.hibernate.org(parent and child one to one relation) Parent pa=new Parent(); pa.setName("laojiang"); Child ca=new Child(); ca.setName("xiaojiang"); pa.setMychild(ca); String pid=pa.getId(); Session sess1=sessions.openSession(); tx=sess1.beginTransaction(); sess1.save(pa); sess1.flush(); tx.commit(); sess1.close(); Session sess2=sessions.openSession(); tx=sess2.beginTransaction(); ! here---> Parent pb=(Parent)sess2.load(com.dnt.test.Parent.class,pid); if(pb==null){System.out.println("load return null");} else{System.out.println("parent:"+pb.getName() +"and his child:"+pb.getMychild().getName()); } tx.commit(); sess2.close(); problem: Hibernate: insert into CHILDS (NAME, id) values (?, ?) Hibernate: insert into PARENTS (NAME, child_id, id) values (?, ... |
15. lazy load problem forum.hibernate.orgI have a one to many relationship b/w Company and Activity. When I load an instance of Activity using its Primary Key(activityId) the company object is also loaded. How can I stop this from happening ? Info: hibernate-2.1, Oracle8, query code: List messages = newSession.find(" from hibernate.CompanyActivity as activity where activity.activityId=327"); The 2 hbm.xml file snippets are ... 1/. Company.hbm.xml |
16. One-To-Many Lazy Loading Problem forum.hibernate.orgHi all, I have a strange problem getting lazy loading to work with a unidirectionaly one-to-many mapping. I think I did everything right.. I set lazy="true" on the set element, the contained class defines a proxy, etc. When I do a session.load() on the object, two queries are performed: 1 for the object itself, and one for it's associations. Anyone have ... |
17. Problem with lazy load one-to-one forum.hibernate.orgI have read http://www.hibernate.org/162.html . Here is what I have set up: Parent: Code: |
18. More lazy load problems, POST redirect to GET forum.hibernate.orgHibernate version: 2.1.6 My web application changes model state in a POST request, then redirects to a .jsp for view rendering which results in a GET request. The problem is that I have implemented the "one Hibernate session per HTTP request" pattern, and I get two requests, a POST followed by a GET. The view (GET) cannot lazy load collections since ... |
19. Derby lazy load problem net.sf.hibernate.AssertionFailure: o forum.hibernate.orgHi, When using lazy="false" with a derby database in a Set with a one-to-many relationship I have the following error. This error is not raised when using ms sql. If I change the lazy mode to true, I don't have the problem but of course I don"t get the child record either. The problem occurs also with a many to many ... |
20. Problem with lazy loading forum.hibernate.orgBeginner Joined: Mon Dec 08, 2003 12:15 am Posts: 47 Folks I apologize for the repost, but it seems that whenever you follow the rules and post to this forum as the moderators require, I hardly ever get any responses. I am trying to lazily load a set and although all the queries run and all the objects are hydrated according ... |
21. i18n problem: how to clever load language dependend texts forum.hibernate.orgHi all, I have a Customer which has a CustomerType (e.g. 1 - Platinum, 2 - Gold, 3 - Silver). I have a table which is stores the i18n texts per language for each CustomerType called CustomerTypeText. The Customer to CustomerType relation is many-to-one and the CustomerType to CustomerTypeText is of course one-to-many (many languages!) The user logins in with his ... |
22. Lazy Loading Problem forum.hibernate.orgAuthor Message tcheung Post subject: Lazy Loading Problem Posted: Mon Mar 21, 2005 8:26 pm Newbie Joined: Thu Oct 28, 2004 10:20 pm Posts: 3 Please help, I'm using Hibernate version 2.1.6. I have two objects with parent/child relationship. When I tried to retrieve the child object data, I would get an error: "Failed to lazily initialze a collection". ... |
23. Problem loading a simple object forum.hibernate.orgAlthough its a simple query for some reason it does not work. Might be something Ive missed. Hibernate version: 3.0.2 Mapping documents: Code: |
24. Lazy Loading - hashcode problem forum.hibernate.orgHi there, I also thought it would be handy indeed to have some comparison capabilities into my pojo's. In fact, this kind of code looks like it could be templated. That's how I ended up installing to Commonclipse plugin. It generates four you the equals & hashcode methods, bungin' all the prop's into a HashCodeBuilder (common-lang) of all properties of that ... |
25. Problem with Loading Hibernate Object forum.hibernate.org |
26. Problem with loading collection forum.hibernate.orgHibernate version: 3.1 Hello everybody I m using Hibernate with lazy loading option by default (CGLIB) I try to test in a JUnit test link between a Pojo named "session" and a Pojo named "module" I got this in my mappings file : in my Module.hbm.xml Code: |
27. newbie load problem. forum.hibernate.orghi. i tried to learn hibernate and using some basic in my application. however, when i try to load an object, it gives a LazyInitializationException. my code looks like public static User LoadUser(User user)//user class current on contain userid { Session session = HibernateUtil.getSessionFactory().getCurrentSession(); Transaction tx = session.beginTransaction(); user = (User)session.load(User.class, user.getUserID()); tx.commit(); return user; } and it gives me exception ... |
28. lazy loading problems (my objects still getting loaded) forum.hibernate.orgHello, Using Hibernate 3.1 I have a problem to lazily load a collection. I have read the Hibernate Documentation and also Hibernate in Action (for Hibernate 2.0). In the book and also the documentation I read that to lazily load a collection you need to set the flag lazy=true. I have done this, however for some reason my system still shows ... |
29. Newbie with Hibernate - Problem with loading forum.hibernate.orgHi! I am a new Hibernate user and I am getting a problem while loading an object from my DB. I always get a "proxy" error. Insertion works properly. Where could the problem come from? Hibernate version: 3.1.3 Mapping documents: Code: |
30. problem:lazy-load action are performed recursively? forum.hibernate.orgI have three entity classes:Operator,Mailbox and MailboxFolder relationship: operator to mailbox is one-to-many and mailbox to mailboxFolder is one-to-many too, and both set lazy to true,but when I set show_sql to true ,I found that when I call operator.getMailBoxSet without call MailBox.getFolderSet(), hibernate try to read all mailBox for this operator,but the confused thing is: hibernate try to read all mailBoxFolder ... |
31. Problem in loading hibernate forum.hibernate.orgHi, i am a developer from HK, currently the earthquake broken the connection from HK to US. And let my application out of order, i am using hibernate3. After investigation, i found it is the problem of hibernate library, sometimes when i load the context, the mapping resources step is much slower than normal(there are only 3 tables to map and ... |
32. Beginner Problem (propbably a loading problem) forum.hibernate.orgHi I created my first entity with some value-types (as component-element within a list-mapping). A short overview of my domain model: Code: public class Vehicle { <-- this is my entity ... some attributes List |
33. lazy loading problem with hibernate 3.2.0 forum.hibernate.orgI work with hibernate 3.2.0 and i faced the following problem Probleme environment --3 persisted classes(p1, p2 and p3) with the following relations --p1 one-to-many p2 one-to-many p3 [p1 many-many p3] with lazy loading , save-update cascade style and bidirectional navigation using maps in the one-side with the many-side id as the map key Problem case --loading a persisted instanse of ... |
34. problem with Hibernate and Lazy Loading forum.hibernate.org |
35. Problems with lazy loading forum.hibernate.org |
36. Two objects reference a 3rd - Problems when loading 2nd forum.hibernate.orgI have instances of classes A and C that both reference the same persistent entity, an instance of class B. A happens to hold a collection of instances of class C (lazily loaded). The instance of class A gets loaded along with its reference to the instance of class B in one session and returned to a web-tier client for manipulation. ... |
37. Collection Loading problem forum.hibernate.orgHello, i have a problem with my collection currentImages. I see in debug, that the entitys are found and loaded (I added debug messages to constructor and setters), but the collection is not filled with them. I tried a lot of things, e.g. different collection types, lazy and not lazy with always the same result. I mapped ItemImageCurrentBidat with only 1 ... |
38. load-collection problem forum.hibernate.orgHi all, see my problem: Code: |
39. problem loading interfaces forum.hibernate.orgHi kattavijay, I think you have to make Status an entity - map it itself. Then, it can be referenced by other entities. I guess you'd need a reference to an existing instance which will be of the type of an implementing class. You might - if possible - turn the interface into an abstract class and let it do the ... |