nullpointerexception in sessionFactory.getCurrentSession(); - spring

I get error nullpointerexception in sessionFactory.getCurrentSession();
Spring Framework 4.0
Glassfish 4.1
hibernate 4.3.6.Final
When I call Session session = sessionFactory.getCurrentSession(); i get error in glassfish server log, but setSessionFactory is set by Spring. What is wrong in my code. Please Help! :)
It's Spring #Component
package service;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ApplicationScoped;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.stereotype.Repository;
import model.Payments;
#Component
#ManagedBean(name = "paymentsService")
#ApplicationScoped
#Repository
public class PaymentsService {
private SessionFactory sessionFactory ;
public PaymentsService()
{
}
public PaymentsService(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
#Autowired
public void setSessionFactory( SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
// #Transactional
public void register(){
Session session = sessionFactory.getCurrentSession();
}
}
It's primefaces #ManagedBean
package backbean;
import java.io.Serializable;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ApplicationScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.context.FacesContext;
import javax.faces.bean.SessionScoped;
import model.Payments;
import service.PaymentsService;
#ManagedBean
#ApplicationScoped
public class Paymentsbeen implements Serializable {
/**
*
*/
private static final long serialVersionUID = 7719279452314113041L;
public String register() {
paymentsService.register();
}
}
It's Spring config file
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- Enable Spring Annotation Configuration -->
<context:annotation-config />
<!-- Scan for all of Spring components such as Spring Service -->
<context:component-scan base-package="service.PaymentsService"></context:component-scan>
<!-- Create Data Source bean -->
<!--<bean id="dbDataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:jdbc/__TestPool"/>
</bean>-->
<bean id="DataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql://localhost:5432/ihomefinance" />
<property name="username" value="postgres" />
<property name="password" value="1" />
</bean>
<!-- Define SessionFactory bean -->
<bean id="hibernate3AnnotatedSessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="DataSource" />
<property name="annotatedClasses">
<list>
<value>model.Payments</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.current_session_context_class">thread</prop>
<prop key="hibernate.show_sql">false</prop>
</props>
</property>
</bean>
<!-- Transaction Manager
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="hibernate3AnnotatedSessionFactory" />
</bean>-->
<bean id="PaymentsServiceID" class="service.PaymentsService">
<property name="sessionFactory" ref="hibernate3AnnotatedSessionFactory" />
</bean>
<!-- Detect #Transactional Annotation
<tx:annotation-driven transaction-manager="transactionManager" />-->
</beans>

Related

Not able to getCurrentSession() from SessionFactory , Getting HibernateException

Its my first very simple Spring-Hibernate application.
i am getting this
'Could not obtain transaction-synchronized Session for current thread ' error
when i am trying to get current session from SessionFactory.
I tried following things..
used #Repository , #Transactional in my dao.
configured TransactionManager.
used # Entity on my entity class.
my root-context.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-
context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- <context:property-placeholder
location="classpath:../properties/db.properties" /> -->
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/hib" />
<property name="username" value="root" />
<property name="password" value="" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.nin.entity" />
<property name="hibernateProperties">
<props>
<prop
key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.default_schema">hib</prop>
</props>
</property>
<tx:annotation-driven transaction-manager="TransactionManager" />
<bean id="TransactionManager"
class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
<property name="prefix">
<value>/WEB-INF/view/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
My dispatcherServlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-
3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-
context-3.1.xsd">
<context:component-scan base-package="com.nin"></context:component-scan>
<mvc:annotation-driven/>
</beans>
My Dao class
package com.nin.dao;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.nin.entity.Student;
#Repository
public class DaoImpl {
#Autowired
private SessionFactory sf;
#Transactional
public void register (Student st){
sf.getCurrentSession(); //Getting Error at this line.
// Session session = sf.getCurrentSession();
// session.save(st);
}
}
lastly my entity class
package com.nin.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="student")
public class Student {
#Column(name="name")
private String name;
#Id
#Column(name="rollno")
private String rollno;
#Column(name="password")
private String password;
#Column(name="city")
private String city;
public Student(){};
//and getters and setters..
Thanks in advance and sorry for my English & representation of question.
The problem is that your Hibernate and transaction configuration is in the configuration file loaded by the ContextLoaderListener. Whereas your components are loaded by the DispatcherServlet due to the <component-scan /> in that file.
When using things like transactions those are applied through AOP. AOP is applied through post processing beans. Post processing only applies to beans in the same context, else you might get strange results.
As you haven't 2 contexts, the AOP stuff is in a different one then the actual components you want to apply AOP to.
You can either put everything in a single context or move the <context:component-scan /> to the configuration containing the transactional configuration.
Note: If you have the same <component-scan /> in the configuration file all of your components will be loaded twice and as the nearest to the component (in this case controller) is being used you have the same problem.

test hibernate entities with spring

I try to tests how hibernate Entities are persisted to database. I have 5 tests for 3 Entitites. All my attempts are unsuccessful((( I tried to use #Transactional annotation to bind each test to one transaction. But I could not (tried all combinations). Now I try to test it manually creating sessions and transactions. But now problem is that I dont know how to create one session for all tests. I tried #BeforeClass, but here problem is that it is static and I use Spring beans for session creation. Any ideas how I can test hibernate Entities?
You can use a dedicated database like HSQLDB for testing you entities via DAO test classes.
You will need a:
Maven test profile
Spring configuration file (test context)
Script SQL to insert some data
DAO class test.
Maven test profile :
<profile>
<id>test</id>
<properties>
<jpa.dialect>org.springframework.orm.jpa.vendor.HibernateJpaDialect</jpa.dialect>
<jpa.vendor.adapter>HibernateJpaVendorAdapter</jpa.vendor.adapter>
<jdbc.dialect>org.hibernate.dialect.HSQLDialect</jdbc.dialect>
<jdbc.url>jdbc:hsqldb:mem:testDatabase</jdbc.url>
<jdbc.driver>org.hsqldb.jdbcDriver</jdbc.driver>
<jdbc.username>sa</jdbc.username>
<jdbc.password></jdbc.password>
<jdbc.format_sql>true</jdbc.format_sql>
<jdbc.show_sql>true</jdbc.show_sql>
<!-- import.sql is read : it must have this name and be in classpath -->
<jpa.generateDdl>true</jpa.generateDdl>
<hibernate.format_sql>true</hibernate.format_sql>
<hibernate.hbm2ddl.auto>create</hibernate.hbm2ddl.auto>
</properties>
</profile>
Spring test-applicationContext.xml file :
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<!-- enables interpretation of the #PersistenceUnit/#PersistenceContext
annotations providing convenient access to EntityManagerFactory/EntityManager -->
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<context:component-scan base-package="foo.bar.dao">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Repository" />
</context:component-scan>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="persistenceUnitName" value="jpaLibrary" />
<property name="jpaDialect">
<bean class="${jpa.dialect}" />
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.${jpa.vendor.adapter}">
<property name="showSql" value="${jdbc.show_sql}" />
<property name="databasePlatform" value="${jdbc.dialect}" />
<!-- On genere la BDD au demarrage -->
<property name="generateDdl" value="${jpa.generateDdl}" />
</bean>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<!-- enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="transactionManager" />
<context:spring-configured />
<context:annotation-config />
</beans>
import.sql (authors for instance):
INSERT INTO `testDatabase`.`authors`(author_id, name) VALUES
(1, "JRR Tolkien"),
(2, "Albert Camus"),
(3, "Victor Hugo");
...
Finally, the class to test your DAO (then entities) :
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import foo.bar.dao.BookDao;
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = { "/test-applicationContext.xml" })
public class BookDaoTest extends AbstractTransactionalJUnit4SpringContextTests {
#Autowired
private BookDao bookDao;
private int initialSize = 0;
#Before
public void init() {
initialSize = bookDao.findAll().size();
}
#Test
public void getAllBooks() {
assertEquals(12, initialSize);
}
...
}

Error creating bean.Injection of autowired dependencies failed. Could not autowire

Hello I´m newbie in spring mvc, i´m using #autowired but i don´t know the solution. Thx you. Sorry but my english, i´m learning it.
I have two class Empresa.java and Ldiario.java. Empresa.java it works.
UPDATE
I updated the following code but I have the same error.
app-config.xml
<!-- Hibernate Session Factory -->
<bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="myDataSource"/>
<property name="packagesToScan" value="com.atorresbr.springapp.**"/>
and I added a bean.
<bean id="diarioBean" class="com.atorresbr.springapp.bean.DiarioBean"/>
Error
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'diarioBean': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.atorresbr.springapp.model.Ldiario com.atorresbr.springapp.bean.DiarioBean.ldiario; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.atorresbr.springapp.model.Ldiario] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1116)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
DiarioBean.java
#ManagedBean(name="diarioBean")
#SessionScoped
#Component
public class DiarioBean {
#Autowired
private Ldiario ldiario;
#Autowired
private Ldiario selectedLdiario;
public DiarioBean(){
}
public Ldiario getLdiario() {
return ldiario;
}
public void setLdiario(Ldiario ldiario) {
this.ldiario = ldiario;
}
public Ldiario getSelectedLdiario() {
return selectedLdiario;
}
public void setSelectedLdiario(Ldiario selectedLdiario) {
this.selectedLdiario = selectedLdiario;
}
}
Ldiario.java
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.Table;
import java.io.Serializable;
import java.sql.Blob;
import java.util.Date;
#Entity
#Table(name = "LDIARIO2014")
public class Ldiario implements Serializable{
#Id
#Column(name = "CLAVE")
#GeneratedValue private Integer CLAVE;
#ManyToOne
#JoinColumn (name = "empresa")
private Empresa empresa;
#Column(name = "ASIENTO")
private Integer ASIENTO;
#Column(name = "ORDEN")
private Integer ORDEN;
#Column(name = "FECHA")
private Date FECHA;
app-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<!-- Scans the classpath of this application for #Components #Service #Repository to deploy as
beans -->
<context:component-scan base-package="com.atorresbr.springapp" />
<!-- Configures the #Controller programming model -->
<mvc:annotation-driven />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<bean id="diarioBean" class="com.atorresbr.springapp.bean.DiarioBean"/>
<!-- JDBC Data Source. It is assumed you have MySQL running on localhost port 3306 with
username root and blank password. Change below if it's not the case -->
<bean id="myDataSource"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.databaseurl}"
p:username="${jdbc.username}"
p:password="${jdbc.password}"
p:validationQuery="${jdbc.validationQuery}" />
<!--
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/pizzashop"/>
<property name="username" value="root"/>
<property name="password" value=""/>
<property name="validationQuery" value="SELECT 1"/>
</bean> -->
<!-- Hibernate Session Factory -->
<bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="myDataSource"/>
<property name="packagesToScan" value="com.atorresbr.springapp.**"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<!-- Hibernate Transaction Manager -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="mySessionFactory"/>
</bean>
<!-- Activates annotation based transaction management -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

org.hibernate.HibernateException: save is not valid without active transaction

I have a problem to save the data with hibernate from Spring.
When I save data get error:
Exception in thread "main" org.hibernate.HibernateException: save is not valid without active transaction
https://gist.github.com/RuzievBakhtiyor/f3009dbc6a9c31090b59
Spring beans config:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
">
<import resource="hibernate.xml"/>
<import resource="dataSource.xml"/>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<context:component-scan base-package="neron" />
Hibernate config bean:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="neron.models" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.current_session_context_class">thread</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
DataSource config bean:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean name="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="123456789" />
</bean>
</beans>
TestDao:
package neron.dao.Impl;
import neron.dao.TestDao;
import neron.models.Test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import javax.transaction.Transactional;
#Transactional
#Repository("testDao")
public class TestDaoImpl implements TestDao {
SessionFactory sessionFactory;
#Autowired
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
private Session getCurrentSession()
{
return (Session)sessionFactory.getCurrentSession();
}
public void save(Test test) {
getCurrentSession().save(test);
}
public Test findById(int id) {
return (Test) getCurrentSession().get(Test.class,id);
}
}
You need to do db update operation (insert, update, delete) within transaction boundary .
Session session = getCurrentSession();
Transaction trans = session.beginTransaction(); //begin transaction
//db operation
session.save(test)
trans.commit(); //end transaction
OR
For annotation support, in your spring config bean, add this
<tx:annotation-driven transaction-manager="transactionManager" mode="proxy" proxy-target-class="true" />
Remove this tag from sessionFactory -> hibernateProperties
<property name="hibernate.current_session_context_class">thread</property>

get Null pointer Exception when try to access model class in dwr function

My SessionFactory object is #Autowired
package com.ravi.dao.daoImpl;
import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.ravi.dao.UserDao;
import com.ravi.model.User;
#Repository("userDao")
public class UserDaoImpl implements UserDao {
#Autowired
private SessionFactory sessionFactory;
#SuppressWarnings("unchecked")
public List<User> listUsers()
{
System.out.println("UserDaoImpl - listUsers");
return (List<User>) sessionFactory.getCurrentSession().createCriteria(User.class).list();
}
#Override
public void saveUser(User user)
{
System.out.println("UserDaoImpl - saveUser");
sessionFactory.getCurrentSession().saveOrUpdate(user);
}
#SuppressWarnings("unchecked")
#Override
public List<User> getUserByUserEmail(String userEmail)
{
System.out.println("UserDaoImpl - getUserByUserEmail");
return sessionFactory.getCurrentSession().createQuery("from User where userEmail=:userEmail").setString("userEmail",userEmail).list();
}
#SuppressWarnings("unchecked")
#Override
public List<User> validateLoginUser(String userEmail, String password)
{
System.out.println("userEmail -- "+userEmail+" password --"+password);
System.out.println("UserDaoImpl - validateLoginUser");
return sessionFactory.getCurrentSession().createQuery("from User where userEmail=:userEmail and password=:password").setString("userEmail", userEmail).setString("password",password).list();
}
}
i create on dwr function which is below.
package com.ravi.dwr;
import java.util.List;
import com.ravi.dao.daoImpl.UserDaoImpl;
import com.ravi.model.User;
public class ForgotPwd
{
public void sendMail(String EmailId)
{
System.out.println("DWR Called.");
UserDaoImpl userDaoImpl=new UserDaoImpl();
List<User> lstUser=userDaoImpl.getUserByUserEmail(EmailId);
User user=lstUser.get(0);
System.out.println("DWR Called.-- userEmail :"+user.getUserEmail());
}
}
when i want to try to print userEmail . null pointer exception is generated # return sessionFactory.getCurrentSession().createQuery("from User where userEmail=:userEmail").setString("userEmail",userEmail).list(); this point.
my spring-servlet.xml cofiguration.
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:property-placeholder location="classpath:jdbc.properties" />
<context:component-scan base-package="com.ravi"/>
<tx:annotation-driven transaction-manager="hibernateTransactionManager" />
<mvc:annotation-driven />
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${database.driver}" />
<property name="url" value="${database.url}" />
<property name="username" value="${database.user}" />
<property name="password" value="${database.password}" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<!-- <bean id="sessionFactory" -->
<!-- class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> -->
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>com.ravi.model.User</value>
<value>com.ravi.model.Language</value>
<value>com.ravi.model.Questions</value>
<value>com.ravi.model.QuestionOptions</value>
<value>com.ravi.model.Admin</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
</props>
</property>
</bean>
<bean id="hibernateTransactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="SessionFactory" ref="sessionFactory" />
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="/WEB-INF/messages" />
</bean>
in my project i used Annotation. is there any way to get user model data in dwr function.
or is there any process which automatically initialized (inject) when i try to use DAO class)
i don't want to remove #Autowired annotation in sessionFactory object. so please suggest me the best way to access or configure dwr function. other way i tried without using #Autowired annotation but in that case i have to entry all bean class in my spring-servlet.xml and also configure. hibernate.cfg.xml file.
in my project i used Annotation. is there any way to get user model data in dwr function.
or is there any process which automatically initialized (inject) when i try to use DAO class)
here i explain whole process. thank you in advance.
below error is generated when i am try to access userDaoImpl function. it is error show that session factory object is not initialized.
on more time i cleared that this is DWR function. which try to access sessionFactory instance.
without interacting controller.
UserLoginController --> showUserLogin
INFO (org.directwebremoting.log.startup:157) - Starting: DwrServlet v3.0.0-RC2-final-312 on Apache Tomcat/7.0.50 / JDK 1.7.0_10 from Oracle Corporation at `enter code here`/OnlineQuestion
DWR Called.
INFO (org.directwebremoting.log.accessLog:427) - Method execution failed:
java.lang.NullPointerException
at com.ravi.dwr.ForgotPwd.sendMail(ForgotPwd.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.directwebremoting.impl.CreatorModule$1.doFilter(CreatorModule.java:229)
at org.directwebremoting.impl.CreatorModule.executeMethod(CreatorModule.java:241)
at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:379)
at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:332)
at org.directwebremoting.dwrp.BaseCallHandler.handle(BaseCallHandler.java:104)
at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:120)
at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:141)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChai
here i explain whole process. thank you in advance.
below error is generated when i am try to access userDaoImpl function. it is error show that session factory object is not initialized.
on more time i cleared that this is DWR function. which try to access sessionFactory instance.
without interacting controller.
Assuming you want to use Spring MVC with DWR, try following code:
WEB-INF/web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app ...>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
WEB-INF/spring-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans
...
xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
...
http://www.directwebremoting.org/schema/spring-dwr
http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd">
<dwr:controller id="dwrController" />
<dwr:annotation-scan base-package="com.ravi.dwr" />
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="alwaysUseFullPath" value="true" />
<property name="mappings">
<props>
<prop key="/dwr/**/*">dwrController</prop>
</props>
</property>
</bean>
<context:component-scan base-package="com.ravi" />
...
</beans>
ForgotPwd.java
package com.ravi.dwr;
...
import org.directwebremoting.annotations.RemoteMethod;
import org.directwebremoting.annotations.RemoteProxy;
...
#RemoteProxy
public class ForgotPwd {
#Autowired
private UserDaoImpl userDaoImpl;
...
#RemoteMethod
public void sendMail(String EmailId) {
System.out.println("DWR Called.");
List<User> lstUser=userDaoImpl.getUserByUserEmail(EmailId);
...
}
...
}

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