openjpa

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Memory leak in Websphere 7 + EJB3, a lot of instances of ClassMapping

sorry for my english, I speak spanish. I recently migrate an application from ejb 2.x to ejb3 (approx. 300 entities), Im using WebSphere 7.0.0.9.[详细]

2022-12-30 18:01 分类：问答
JPA/Hibernate bulk(batch) insert

Here is simple example I\'ve created after reading several topics about jpa bulk inserts, I have 2 persistent objects User, and Site. One user could have many site, so we have one to many relations he[详细]

2022-12-29 10:49 分类：问答
sql query with space in the value

How do I write where clause 开发者_Python百科where the value has spaces: Actually I am using openJPA and I have to set parameter.[详细]

2022-12-28 21:47 分类：问答
JoinColumn name not used in sql

I have a problem with mapping many-to-one relationship without exact foreign key constraint set in database. I use OpenJPA implementation with MySql database, b开发者_如何学Pythonut the problem is wit[详细]

2022-12-28 05:57 分类：问答
How to find out efficiently the auto-generated id for a new object when using JPA?

I have an attribute which is annotated with @Id. The ID is going to be generated automatically when persisting the object. That means that the ID-value is not defined before I persist the object. Afte[详细]

2022-12-27 22:20 分类：问答
JPA ManyToMany referencing issue

I have three tables.AvailableOptions and PlanTypeRef with a ManyToMany association table called AvailOptionPlanTypeAssoc.The trimmed down schemas look like this[详细]

2022-12-27 04:24 分类：问答
How to do a timestamp comparison with JPA query?

We need to make sure only results within the last 30 days are returned for a JPQL query. An example follows:[详细]

2022-12-24 07:09 分类：问答
Help with JPQL query

I have to query a Message that is in a provided list of Groups and has not been Deactivated by the current user. Here is some pseudo code to illustrate the properties and entities:[详细]

2022-12-24 04:12 分类：问答
Is there any advantage for using a library other than Hibernate for JPA?

I\'ve been using JPA for some time now and been in projects where we\'ve used both Hibernate Annotations and Toplink Essentials.[详细]

2022-12-23 18:51 分类：问答
JPA concatenating table names for parent/child @OneToMany

We are trying to use a basic @OneToMany relationship: @Entity @Table(name = \"PARENT_MESSAGE\") public class ParentMessage {[详细]

2022-12-23 12:32 分类：问答