jpa Questions
3
Solved
I'm using a PostgreSQL DB and I would like to start VACUUM FULL using JPA EntityManager.
Version 1
public void doVacuum(){
entityManager.createNativeQuery("VACUUM FULL").executeUpdate()
}
thro...
Spinose asked 27/10, 2017 at 19:59
3
Solved
TestRepository extends JpaRepository<Test, Long>
JpaRepository is an interface. Why do we extend it and not implement it as we know in Java? As far as I know, interfaces are implemented, not...
Aguirre asked 15/11, 2019 at 16:36
3
Solved
According to the documentation, the following usage is deprecated:
@GenericGenerator(
name = "UUID",
strategy = "org.hibernate.id.UUIDGenerator"
)
One shall use the new type...
Tirrell asked 19/7, 2023 at 16:12
2
I have some JPA classes and generate metamodel through org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor. So, one of my classes is:
@Table(name = "USER")
@Entity
@NamedQueries({@NamedQuery(nam...
Unfounded asked 20/4, 2016 at 13:36
3
Solved
I have a Role enum, like this:
public enum Role{
admin('a'),
member('m'),
pending('p');
char role;
Role(char a) {
this.role = a;
}
public char getRole() {
return role;
}
public static R...
Hypognathous asked 31/12, 2019 at 13:54
9
Every time I run my code, I get the following error:
java.lang.RuntimeException: javax.annotation.processing.FilerException: Attempt to recreate a file for type domein.ClubLes_
[javac] at org.ec...
Alton asked 7/5, 2019 at 10:13
3
Solved
I have a field id defined as below. It's varbinary(16) in database, when i am inserting a new record through JPA, i got "com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for colum...
Bonzer asked 4/6, 2014 at 3:24
4
I'm using the JPA CriteriaBuilder to select entities of type MyEntity from a MySQL db as follows:
String regExp = "(abc|def)"
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery query = cb...
6
I want to use JPA with Spring on Wildfly. I tried this configuration:
application.properties:
spring.jmx.enabled=false
spring.datasource.jndi-name=java:/global/production
spring.datasource.driver...
Bedraggled asked 25/7, 2018 at 7:34
5
Solved
package com.abc.def.model;
import javax.persistence.Column;
import javax.persistence.Id;
import javax.persistence.Entity;
import javax.persistence.Embeddable;
import javax.persistence.IdClass;
imp...
8
I am trying to build a web application, I didn't add any classes or packages I have just ran the app but it says
java.lang.NullPointerException: Cannot invoke "org.hibernate.engine.jdbc.spi.Sq...
Forerunner asked 1/11, 2023 at 22:30
2
Solved
I have fairly typical scenario where there is a main @Entity and everything inside him is embeddable (so everything inside doesn't make sense without the parent). Now JPA 2.0 is blocking me to nest...
Bowe asked 2/3, 2014 at 10:24
7
Solved
I use JPA criteria API to fetch records from the datebase.
I have entity Record with field dateTime which can be null. I would code:
public List<Record> find(RecordFilter recordFilter, int p...
Sherburne asked 7/1, 2017 at 11:35
4
I have a custom repository declared like below(written in Kotlin):
interface FooRepository : JpaRepository<Foo, Int> {
fun findByFoo(foo: String): List<Foo>
fun findByBar(bar: String...
4
Solved
In my Hibernate JPA Sample code..
public List<AttendeesVO> addAttendees(String searchKeyword) {
TypedQuery<AttendeesVO> query = entityManager.createQuery(" select at from AttendeesVO ...
4
We decided on using optimistic locking in our web application in order to increase concurrency and without the using of pessimistic locking.
We are now on a lookout for retry solutions.
We would ...
Sackett asked 10/2, 2014 at 8:44
12
Solved
If I run multiple threads against my web app I get:
java.sql.SQLException: [SQLITE_BUSY] The database file is locked (database is locked)
at org.sqlite.DB.newSQLException(DB.java:383)
at org.sql...
13
Solved
I am a novice in hibernate world and facing,
WARN: GenerationTarget encountered exception accepting command : Error executing DDL via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptance...
Civilization asked 14/4, 2017 at 7:47
9
Solved
I'm trying to run a query that checks if some conditions are true and returns a simple boolean result as output. What makes it slightly tricky is that one of the conditions is to test for whether n...
6
Solved
Project use Hibernate (JPA), Spring and Maven. My entity and DAO in a separate JAR.
pom.xml:
<project ...>
...
<artifactId>database</artifactId>
<dependencies>
<de...
2
I have a SpringBoot application with hibernate. In my tests I would like to disable any sort of db connection and configuration (tests don't have access to db). How should I do it ?
My test class ...
Gdynia asked 23/10, 2019 at 7:10
5
for some reason I have not being able to find a suitable answer for this. I have the following simple entity:
@Entity
@Table(name = "simple_entity")
@Access(AccessType.FIELD)
public class SimpleEn...
Ampliate asked 21/8, 2013 at 6:19
16
I am trying to edit a table in Postgresql using JPA in Glassfish using EclipseLink. When I insert an entity, it runs fine. But, when I try to edit or remove the same entity, it fails with the follo...
Voracious asked 17/9, 2010 at 23:53
3
Solved
I'm having trouble with the ordering of the columns in my composite primary key. I have a table that contains the following:
@Embeddable
public class MessageInfo implements Serializable {
privat...
Militant asked 15/11, 2011 at 16:13
2
Is it possible to get the associated persistence unit name of an EntityManager object? For example, you have
@PersistenceContext( unitName="fooPU" )
private EntityManager em;
Is it possible to ...
Cornhusking asked 9/11, 2013 at 7:6
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