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
1 answer
Can not create the query using entity manager
When i am executing this code (JPA)
Query q=entityManager.createQuery(SELECT mc.account_no,mc.expiry_date,
SUM(CAST(CONCAT(mc.sign,mc.balance) AS NUMBER)),mc.moneybank_id FROM muthutcardbalance mc
WHERE mc.account_no='20' AND…
user5122076
0
votes
2 answers
Why JPQL generated query differs from original
I am reviewing a JPQL query like that:
SELECT SELECT SUM( func('NVL', l.prim_emiti_ced_periodo, 0)
+ func('NVL', l.prim_dev_n_emiti_ced_fin, 0)
- func('NVL', l.prim_dev_n_emiti_ced_ini, 0))
primas_cedidas_netas,
SUM( …
Fran Montero
- 1,679
- 12
- 24
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votes
0 answers
How to manage the concurrency using JTA(entityManager) so that the application can scale at large number of concurrent users?
I am having a Java EE application that uses JPA as a persistence framework having transaction type JTA. I am using EntityManager annotated with PersistenceContext.
My SessionBean looks like this:
package com.session;
import…
MUKUND KUMAR
- 11
- 5
0
votes
1 answer
ClassNotFound : javax.persistence.Persistence when creating entity Manager Factory
I am working on a project with JSF and hibernate.
I divided the project into 3 layers (view, service, DAO)
in service layer I am creating an instance of DAO class,
but when reaching Persistence.createEntityManagerFactory("E_GYM")
it throws an…
Omar.Nassar
- 379
- 1
- 3
- 14
0
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0 answers
How I write with the EntityManager in MySQL Database?
hi i have a java ee application and use JPA. (EJB). I have two Entities.
The Ticket and the User Class.
My Problem is that I dont can write the User in the Database :( The Ticket works...!
here is the user class:
@Entity
@NamedQueries({
…
Tarasov
- 3,625
- 19
- 68
- 128
0
votes
2 answers
Issue with hibernate entity manager on multiple servers
I am using hibernate in dropwizard framework.
Configuration of application: having a loadbalancer for the backend for multiple servers.
The issue is when i am saving a new record, the records get saved in the database. But when i am trying to…
Ankush
- 1
- 5
0
votes
1 answer
JPA DAO Update row without full row context
Have a table with >70 columns.
I use about 8 of these columns with the .java object, including the id - not sure if that matters.
My Id column has the following:
@Column(name = "pseudonym", nullable = false)
@Basic(fetch = FetchType.EAGER)
@Id
My…
shanehoban
- 870
- 1
- 9
- 30
0
votes
0 answers
Hibernate Entity Manager
I have a list of Date objects. I assigned that list in setParameter ("dates", datesList) and then I did c.createDate IN (:dates). It does not work (query returns 0 results back). How do I do this?
em.createQuery("""
select u.name, s.description,…
JBone
- 1,724
- 3
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- 32
0
votes
2 answers
spring 4 struts 1.x mixing xml and java config
I am not very familiar with spring, so added everything related to spring.
I have a spring 4 struts 1.x application.
Spring context is loaded using struts plugin which points to spring-context.xml
almeynman
- 7,088
- 3
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- 37
0
votes
2 answers
Why is my EntityManager not properly injected?
I tried to build a project with manages Employees using JPA and Beans and JSF. I started trying to manipulated an existing user which I manually created in the database. (before I tried to read the data from the database, this worked well) I tried…
Liae Neya
- 31
- 6
0
votes
1 answer
BreezeJs features already implemented by AngularJs?
I was suggested to use BreezeJs for an AngularJs project and I saw that it has some really interesting features.
In my case the main interests would be in caching, tracking changes, some light querying, and validation.
I think those features can be…
alexandru.pausan
- 479
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0 answers
Refresh collection / empty cache - using entity manager
Hello guys I have pretty strange problem that I cannot resolve my code looks like this:
@Transactional
public List readproductObjectes() {
TypedQuery query = em.createQuery("SELECT productObject FROM…
user3353393
- 139
- 3
- 12
0
votes
1 answer
Spring context unable to resolve among multiple entity managers
I have a module A that has its own EntityManager em. This module is a dependency in other module B. Module B interacts with two instances of same db,and based on business logic I decide which record to store in which db.
For this I have two entity…
Philip
- 28
- 4
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0 answers
EnetityManager assigning multiple values to a key
em.createQuery("""
select s.description, avg(c.taktTime)
from CountEntity c, SkillEntity s, FwmsUserEntity u, SkillTypeEntity t
where c.fwmsUser = u.id
*AND s.description in…
JBone
- 1,724
- 3
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- 32
0
votes
1 answer
JBoss Seam cannot create Java Persistence Entity Manager
I am at a complete loss with this one. I am scouring the Internet via Google to try and find a solution for this problem. I haven't used JBoss in a very long time, and we use Seam version 2 ... not sure what exact version. I've never used Seam…
tjholmes66
- 1,850
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- 73