CODEWITHSUNDEEP
javahibernatespringspring-mvcdependency-injection
raven-king
raven-king

Reputation: 1550

Spring SessionFactory Injection Issue

I've been trying to learn to use various featured of Spring 3.0.x and I've come across an issue when I'm trying to inject a session factory into a DAO implementation. I receive a NullPointerException when I try to use my injected SessionFactory instance variable which leads me to believe that the problem exists in the bean definition.

dispatcher-servlet.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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">

  <context:component-scan base-package="com.timerecorder"/>

  <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/jsp/"/>
    <property name="suffix" value=".jsp"/>
  </bean>

  <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="oracle.jdbc.OracleDriver"/>
    <property name="url" value="jdbc:oracle:thin:@xxx.xxx.x.xxx:xxxx:xx"/>
    <property name="username" value="xxx"/>
    <property name="password" value="xxx"/>
  </bean>

  <bean id="mySessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="myDataSource"/>
    <property name="hibernateProperties">
        <value>
            hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
        </value>
    </property>
  </bean>

</beans>

EntryImpl.java

package com.timerecorder.entity;

import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

@Repository
public class EntryImpl implements EntryDao
{

  private SessionFactory sessionFactory;

  @Autowired
  public void setSessionFactory(SessionFactory sessionFactory) 
  {
      this.sessionFactory = sessionFactory;
  }

  @Override
  public boolean saveEntry(EntryForm efd) 
  {
      // Place the details from the entry form into the Entry entity
      Entry e = new Entry();
      e.setId(Long.valueOf(efd.getUserId()));

      this.sessionFactory.getCurrentSession().save(e);

      return true;
  }

  @Override
  public boolean removeEntry(Long id) 
  {
      throw new UnsupportedOperationException("Not supported yet.");
  }

  @Override
  public List getEntries(Long id) 
  {
      throw new UnsupportedOperationException("Not supported yet.");
  }

  @Override
  public Entry getEntry(Long id) 
  {
      return new Entry();
  }

}

Any help would be appreciated.

Kind Regards,

Justin

Upvotes: 0

Views: 3402

Answers (3)

Shaunak
Shaunak

Reputation: 18028

Looks like it may be a naming convention problem in your bean definations.

Try renaming

id= "mySessionFactory"

to

id= "sessionFactory"

Let me know if that helps.

Upvotes: 2

Kamesh Rao Yeduvakula
Kamesh Rao Yeduvakula

Reputation: 1205

Try the method init() to autowire the session factory.

This is how it works for me ->

@Repository
public class UserDaoImpl extends HibernateDaoSupport implements UserDao {
    @Autowired
    public void init(SessionFactory factory) {
        setSessionFactory(factory);
    }
}

setSessionFactory is the method provided by HibernateDaoSupport

Upvotes: 0

Steven Fines
Steven Fines

Reputation: 477

It looks like you're autowiring by name but you need to autowire your sessionFactory by type instead - or you can rename the bean definition to sessionFactory and it should just work.

Also, you need to be sure you're getting your bean out of the application context instead of just new'ing it.

Upvotes: 0

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