Develop Reference

Having an error org.hibernate.HibernateException. The error is in the init method (while running the application as java app.)

Mvn clean and Mvn install are successful without warnings and errors.The files hibernate.cfg.xml and App.java are:
The error from console during initialization is:
log4j:WARN No appenders could be found for logger (org.jboss.logging).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" org.hibernate.HibernateException: Connection cannot be null when 'hibernate.dialect' not set
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:97)
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:67)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:170)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1797)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1755)
at com.icdab.www.icdab_first.App.init(App.java:33)
at com.icdab.www.icdab_first.App.main(App.java:76)
Hibernate.cfg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver.class">oracle.jdbc.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:#localhost:1521:ORCL</property>
<property name="hibernate.connection.username">system</property>
<property name="hibernate.connection.password">password</property>
<property name="hiberante.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="show_sql">true</property>
<mapping class="com.icdab.www.icdab_first.CompundKey" />
<mapping class="com.icdab.www.icdab_first.Customer" />
<mapping class="com.icdab.www.icdab_first.Employee" />
<mapping class="com.icdab.www.icdab_first.EventPlan" />
<mapping class="com.icdab.www.icdab_first.EventPlanLine" />
<mapping class="com.icdab.www.icdab_first.EventRequest" />
<mapping class="com.icdab.www.icdab_first.Facility" />
<mapping class="com.icdab.www.icdab_first.Location" />
<mapping class="com.icdab.www.icdab_first.ResourceTbl" />
</session-factory>
</hibernate-configuration>
App.java:
package com.icdab.www.icdab_first;
import java.sql.Date;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
/**
* Hello world!
*
*/
public class App
{
private SessionFactory factory;
private void init(){
System.out.println("in init");
Configuration config = new Configuration().configure("hibernate.cfg.xml")
/*.addAnnotatedClass(CompundKey.class)
.addAnnotatedClass(Customer.class)
.addAnnotatedClass(Employee.class)
.addAnnotatedClass(EventPlan.class)
.addAnnotatedClass(EventPlanLine.class)
.addAnnotatedClass(EventRequest.class)
.addAnnotatedClass(Facility.class)
.addAnnotatedClass(Location.class)
.addAnnotatedClass(ResourceTbl.class) */;
// learn why did you use the annotatedclass and configuration.
ServiceRegistry registry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
factory=config.buildSessionFactory(registry);
}
#SuppressWarnings("deprecation")
private void persistAnnotatedLists(){
Session session = factory.getCurrentSession();
session.beginTransaction();
Customer customer = new Customer();
customer.setAddress("address123");
customer.setCity("lansing");
customer.setContact("1632 ne ave");
customer.setCustname("john");
customer.setCustno("1234");
customer.setInternal("internal");
customer.setPhone(122345679);
customer.setState("OR");
customer.setZip(97654);
List<EventRequest> ers = new ArrayList<EventRequest>();
ers.add(new EventRequest(123,new Date(92,5,1),new Date(91,5,1),new Date(93,5,1),"av",123,456,124));
ers.add(new EventRequest(1234,new Date(92,5,2),new Date(91,5,2),new Date(93,5,2),"av",124,457,125));
customer.setEventrequests(ers);
session.save(customer);
session.getTransaction().commit();
System.out.println("done persist");
}
private void retrieveList(){
Session session = factory.getCurrentSession();
session.beginTransaction();
List list = session.createQuery("from com.icdab.www.icdab_first.Customer").list();
for (Object object : list) {
System.out.println("** List items: "+object);
}
session.getTransaction().commit();
System.out.println("Done retrieve");
}
public static void main (String[] args){
App app = new App();
app.init();
app.persistAnnotatedLists();
app.retrieveList();
}
}
And the project structure is:

Cant connect to postgreSQL with Hibernate(Eclipse)

What i do wrong? After running main class i have view in console like in current screenshot below and the console continues to work and nothing happens.
hibernate.cfg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql://localhost:5432/Gillie_PL</property>
<property name="connection.username">postgres</property>
<property name="connection.password">postgres</property>
<property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
</session-factory>
</hibernate-configuration>
hibernateUtil.class:
package hibernateConn;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
private static SessionFactory sessionFactory = null;
static {
Configuration cfg =
new Configuration().configure("/hibernateConn/hibernate.cfg.xml");
StandardServiceRegistryBuilder builder =
new StandardServiceRegistryBuilder()
.applySettings(cfg.getProperties());
sessionFactory = cfg.buildSessionFactory(builder.build());
}
public static SessionFactory getSessionFactory(){
return sessionFactory;
}
}
Main.Class:
package hibernateConn;
import org.hibernate.SessionFactory;
public class Main {
public static void main(String[] args) {
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
}
}
After I run Main.class I have in console:
And that's all. Nothing more, the program continues to work and nothing happens, as if recursion occurs ... Maybe I did not correctly specify the settings in xml?

 
I rewrote the HibernateUtil.class :
static {
try{
sessionFactory = new Configuration().configure("/hibernateConn/hibernate.cfg.xml").buildSessionFactory();
}catch(Throwable ex){
System.err.println("++++Initial SessionFactory creation failed.++++: " + ex);
ex.printStackTrace();
}
}
public static SessionFactory getSessionFactory(){
return sessionFactory;
}
and it all worked. The question can be closed.

I can't get get the SessionFactory in Hibernate 5.1.0. My code breaks in the line while getting the SessionFactory obj

Image
ERROR:
1) AdminModel.java - Model class.
2) HibernateUtil.java facilitates the Hibernate DB conn.
3) AdminDAO.java - u guyz know what these are...I'll save the pain to explain...and oh yes...m already through days of pain with this bug ...trynna debug...i've got deadlines to meet... if u guyz could help me it'd be a matter of great deal...
public class AdminModel {
private int adminID;
private String username;
private String password;
public int getAdminID() {
return adminID;
}
public void setAdminID(int adminID) {
this.adminID = adminID;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
HibernateUtil.java
public class HibernateUtil {
public static SessionFactory sessionFactory;
static {
try {
/* File f=new File("O:/#workspace/#eclipse/ekatabookstore.com/src/hibernate.cfg.xml");
sessionFactory =new Configuration().configure(f).buildSessionFactory();
*/
/****OR****/
String hibernatePropsFilePath = "O:/#workspace/#eclipse/ekatabookstore.com/src/hibernate.cfg.xml";
File hibernatePropsFile = new File(hibernatePropsFilePath);
Configuration configuration = new Configuration();
configuration.configure(hibernatePropsFile);
configuration.addResource("ekatabookstore.hbm.xml");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
} catch (Exception ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
//throw new ExceptionInInitializerError(ex);
}
}
public static Session openSession() {
return HibernateUtil.sessionFactory.openSession();
//return sessionFactory.getCurrentSession();
}
}
AdminDAO.java
public AdminDAO(AdminModel adminUserObj) {
public void createAdmin() {
/*
* CRUD operation of HIBERNATE C-->Create SessionFactory Object is a
* heavy object and takes up huge resources, so it is better to create
* only one object and share it where needed.
*/
SessionFactory sessionFactoryObj = HibernateUtil.sessionFactory;
// System.out.println(sessionFactoryObj.getClass().getName());
Session session = sessionFactoryObj.openSession();
session.beginTransaction();// Transaction Started
session.save(adminObj);// SAVED
session.getTransaction().commit();// Transaction Ended
System.out.println("!!!SUCCESSFUL CREATE!!!");
session.close();// CLOSE session resource of Hibernate
Notification.notificationMsg = "ADMIN CREATE - SUCCESSFUL!";
}
}
hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!--
~ Hibernate, Relational Persistence for Idiomatic Java
~
~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
-->
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/ekatabookstoreDB</property>
<property name="connection.username">xyz</property>
<property name="connection.password">xyz</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<!-- <property name="hbm2ddl.auto">create</property> -->
<property name="hbm2ddl.auto">update</property>
<mapping resource="ekatabookstore.hbm.xml" />
</session-factory>
</hibernate-configuration>
hbn.properties
hiberNateCfgFileName=hibernate.cfg.xml
ekatabookstore.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.ekatabookstore.layer.service.model.AdminModel" table="admin">
<id name="adminID" type="integer" column="id_admin">
<generator class="assigned" />
</id>
<property name="username" type="string" column="username" not-null="true" />
<property name="password" type="string" column="password" not-null="true" />
</class>
</hibernate-mapping>

If you are using spring then, Add autowire on sessionfactory or get it from application context. You can use following code
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
public class ApplicationContextProvider implements ApplicationContextAware{
private static ApplicationContext context;
public static ApplicationContext getApplicationContext() {
return context;
}
#Override
public void setApplicationContext(ApplicationContext ac)
throws BeansException {
context = ac;
}
}
You can use this class anywhere in your code like
ApplicationContextProvider.getApplicationContext().getBean("sessionFactory");

Please try the following code for creating sessionfactory
final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure() // configures settings from hibernate.cfg.xml
.build();
try {
sessionFactory = new MetadataSources( registry).buildMetadata().buildSessionFactory();
}
catch (Exception e) {
StandardServiceRegistryBuilder.destroy( registry );
}
Hope this helps.

SB - How to provide a hibernate.cfg.xml file to a LocalSessionFactoryBuilder?

Introduction
I am trying to convert a working XML configured spring batch job to javaconfig and I am running into some issues with setting up the session. I want to use a hibernate.cfg.xml file to configure the connection (and I also use it elsewhere, so I do need to keep it).
Given
The working xml configuration looks as following:
<!-- Standard Spring Hibernate Reader -->
<bean id="hibernateItemReader" class="org.springframework.batch.item.database.HibernateCursorItemReader" scope="step">
<property name="sessionFactory" ref="sessionFactory" />
<property name="queryString" value="#{jobExecutionContext[HQL]}" />
<property name="useStatelessSession" value="false"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" lazy-init="true">
<property name="configLocation" value="classpath:hibernate.cfg.xml"/>
<property name="cacheableMappingLocations" value="classpath*:META-INF/mapping/*.hbm.xml"/>
</bean>
And the hibernate.cfg.xml looks as following:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE hibernate-configuration SYSTEM "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Connection to database -->
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/SAKILA</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">****</property>
<!-- Conversion from HQL to SQL in log -->
<property name="show_sql">false</property>
<property name="format_sql">true</property>
<property name="use_sql_comments">true</property>
<!-- Session and pool settings -->
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">1800</property>
<property name="hibernate.c3p0.idle_test_period">1000</property>
<property name="hibernate.c3p0.max_statements">50</property>
</session-factory>
</hibernate-configuration>
The following java config..
#Bean
#Lazy(true)
public SessionFactory sessionFactory(){
LocalSessionFactoryBean session = new LocalSessionFactoryBean();
session.setConfigLocation(hibernateConfig());
session.setCacheableMappingLocations(mappings());
return session.getObject();
}
#Bean
#StepScope
public HibernateCursorItemReader reader(#Value("#{jobExecutionContext[HQL]}") String HQLQuery){
HibernateCursorItemReader reader = new HibernateCursorItemReader<>();
reader.setSessionFactory(sessionFactory());
reader.setQueryString(HQLQuery);
reader.setUseStatelessSession(false);
return reader;
}
Issue
reader.setSessionFactory(sessionFactory());
Throws:
Caused by: java.lang.IllegalStateException: A SessionFactory must be provided
After some research, I think I need to use the LocalSessionFactoryBuilder instead of the LocalSessionFactoryBean.
#Autowired
#Bean
public SessionFactory sessionFactory2(){
LocalSessionFactoryBuilder sessionBuilder = new LocalSessionFactoryBuilder(dataSource());
// ?? sessionBuilder.setConfigLocation(); ??
sessionBuilder.addDirectory(new File(url.toURI()));
}
However, I do not want to provide a datasource because I have all the datasource connection information configured in the hibernate.cfg.xml file.
The accepted answer on How to make hibernate.cfg.xml to a datasource bean suggest to keep the hibernate.cfg.xml file and add Spring configuration.
How do I add hibernate.cfg.xml file to the LocalSessionFactoryBuilder?

I figured it out. I do not want to use the LocalSessionFactoryBuilder at all. In my program I have the following class:
public class HibernateUtil {
private static final SessionFactory SESSIONFACTORY = buildSessionFactory();
private static final String HIBERNATE_CONFIGURATION_LOCATION = "hibernate.cfg.xml";
private static final String MAPPINGS_LOCATION = "src/main/resources/mappings";
private static ServiceRegistry serviceRegistry;
private static SessionFactory buildSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure(HIBERNATE_CONFIGURATION_LOCATION).addDirectory(new File(MAPPINGS_LOCATION));
serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
} catch (Exception e) {
System.err.println("Initial SessionFactory creation failed." + e);
throw new ExceptionInInitializerError(e);
}
}
public static SessionFactory getSessionFactory(){
return SESSIONFACTORY;
}
public static void shutdown(){
getSessionFactory().close();
}
}
And calling reader.setSessionFactory(HibernateUtil.getSessionFactory()); did the trick for me!

Hibernate PreUpdateEventListener doesn`t work

I'm trying to implement the PreUpdateEventListener of Hibernate in my project, but nothing happens.
My configuration.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/bd_brittos</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.show_sql">true</property>
<mapping resource="hibernate/mapeamento/Compra.hbm.xml"/>
<mapping resource="hibernate/mapeamento/CompraHasProduto.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Entidade.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Pesagem.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Produto.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Tabelapesagem.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Venda.hbm.xml"/>
<mapping resource="hibernate/mapeamento/VendaHasProduto.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Contasreceber.hbm.xml"/>
<mapping resource="hibernate/mapeamento/CaixadiarioHasContaspagar.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Contaspagar.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Caixadiario.hbm.xml"/>
<mapping resource="hibernate/mapeamento/CaixadiarioHasContasreceber.hbm.xml"/>
<mapping resource="hibernate/mapeamento/Conf.hbm.xml"/>
<event type="pre-update">
<listener class="br.com.areiasbrittos.persistencia.MyHibernateEventListener" />
</event>
</session-factory>
</hibernate-configuration>
My MyHibernateEventListener class:
import javax.swing.JOptionPane;
import org.hibernate.event.spi.PreUpdateEvent;
import org.hibernate.event.spi.PreUpdateEventListener;
/**
*
* #author Maycon
*/
public class MyHibernateEventListener implements PreUpdateEventListener {
public MyHibernateEventListener() {
this.atencao();
}
public void atencao() {
System.out.println("EEEEUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU\n\n");
JOptionPane.showMessageDialog(null, "MyLoadListener");
}
#Override
public boolean onPreUpdate(PreUpdateEvent pue) {
this.atencao();
return true;
}
}
Result: The console didn't show anything.

Perhaps this is no longer relevant, but you had to add the following code:
#PostConstruct
protected void init(){
SessionFactoryImpl sF = emf.unwrap(SessionFactoryImpl.class);
EventListenerRegistry registry = sF.getServiceRegistry().getService(EventListenerRegistry.class);
registry.getEventListenerGroup(EventType.PRE_UPDATE).appendListener(this);
}
Works in Spring