The EntityManager is the representation of a PersistenceContext, allowing a user to manipulate data pulled from a database.
Questions tagged [entitymanager]
1802 questions
0
votes
2 answers
Why my is EntityManager fetching outdated database object
Situation:
App A (war running on a tomcat 7, rest interface for a web app)
App B (java standalone, scheduled batch jobs loading data from a file into a database)
In between a shared control table with a record per file.
App A correctly persists new…
MMA
- 13
- 3
0
votes
1 answer
Hibernate AbstractMethodError
I am using the latest version of spring, hibernate and spring data jpa on a gradle project but I get an AbstractMethodError exception. here is part of the stack trace
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating…
Ashken
- 69
- 1
- 10
0
votes
2 answers
NoSuchBeanDefinitionException: No qualifying bean of type found for dependency using annotaition
I have such project structure:
persistence.xml:
Tom Wally
- 542
- 3
- 8
- 20
0
votes
1 answer
JPA - Hibernate session is closed, but entitymanager works
Given the two line of code :
entityManager.find(MyEntity.class, myId);
((Session) getEntityManager().getDelegate()).load(MyEntity.class, myId);
The first instruction works fine, but the second one throws org.hibernate.SessionException: Session is…
fego
- 309
- 5
- 20
0
votes
2 answers
execute a query using entity manager
I have a query to get the size of databases I have.
I have written the following:
@SuppressWarnings("unchecked")
List results = (List) em.createQuery("SELECT sum( data_length + index_length ) / 1024 / 1024 \"DataBaseSizeinMB\" FROM…
Pegah
- 672
- 2
- 13
- 23
0
votes
0 answers
ORA-02291: integrity constraint (GOPI.SYS_C007099) violated - parent key not found with Hibernate
I have implemented a project in hibernate with MySQL which works fine. But my client wants it in Oracle 11g but the following code throws me this error.
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-02291: integrity constraint…
Gopi Lal
- 417
- 5
- 23
0
votes
1 answer
What Determines a persistence unit
I am creating a Java EE application and have setup my persistence using hibernate. Since I do not see this app being all that big I do not see the point in using EJBs so I created a PersistenceUtil class to manage my EntityManagerFactory.
Something…
nerdlyist
- 2,842
- 2
- 20
- 32
0
votes
2 answers
Updating the ID of an instance in JPA
I am using JPA annotations(hibernate implementation), and i want to change the ID of an entity by merging it.There is any annotation or solution to avoid duplicating then removing the entity?
Ameur fahd
- 21
- 2
- 5
0
votes
1 answer
Is it possible to make JPA throw an exception on a nontransactional write?
I am wondering if it is possible to make a JPA implementation throw an exception when a managed BO is modified outside a transaction of the managing entity manager. For example:
BO someBO = new…
gchris
- 1
- 1
0
votes
1 answer
How get EntityManager in OSGI in Abstract Class?(like spring @PersistenceContext)
I tried create BaseDao and inject EntityManager to it. In Spring I was make this:
public abstract class BaseJpaDao implements BaseDao{
protected Class entityClass;
@PersistenceContext(unitName = "access")
protected…
user5620472
- 2,722
- 8
- 44
- 97
0
votes
2 answers
How to use EntityManager in Singleton DAO from Servies
I'm new in JavaEE. I'm trying to make webapp using JPA with DAO and Service layer. Part of the task is not to use Spring and Hibernate. So i can use only JPA.
As i understand, Service and Dao should be a Singletones. I should get EntityManager on…
Nem Exodare
- 1
- 1
- 1
0
votes
3 answers
Why EntityManager's getDelegate() method does not return EntityManagerImpl as underlying object in Hibernate?
I am working on a migration of an application from Hibernate/OpenEJB/TomEE to Hibernate/JBoss and I have this exception at runtime:
java.lang.ClassCastException: org.hibernate.internal.SessionImpl cannot be cast to…
Walid Ammou
- 390
- 1
- 6
- 21
0
votes
1 answer
Syntax Error in running a query in hql
I have a mysql table summarized as under:
select * from transaction where workflow_id = 'A'\G
*************************** 1. row ***************************
transfer_id: 2
workflow_id: A
amount: 552
status:…
archit
- 69
- 1
- 2
- 9
0
votes
0 answers
can't create entity manager, when add relationships
My classes:
@Entity
public class Contacts {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String login;
private long token;
@OneToOne
@PrimaryKeyJoinColumn
private UserInfo…
Igoryan
- 53
- 4
0
votes
1 answer
EntityManager connections stuck at 'Idle in transaction' after persist/commit
My EntityManager is persisting/committing data to a Postgres database no problem. However, the connections it makes get stuck at 'Idle in transaction'. Here's my code:
public User create(User user) {
if(logger.isDebugEnabled()) {
…
ev0lution37
- 1,129
- 2
- 14
- 28