gethibernatetemplate().save(object) does not persist data

Question

I have bellow code stuffs and I'm using spring and hibernate

//main method in main class

public static void main(String[] args) {        
        String[] path = new String[]{"applicationContext.xml"};
        ApplicationContext context = new ClassPathXmlApplicationContext(path); 
        serviceObj = (ServiceClassType)context.getBean("serviceBean");
        serviceObj.doTask();  

    }

//service method in service class

doTask(){
Obj obj=new Obj();
obj.setValue1("value1");
obj.setValue2("value2");
myDao.saveObject(obj);

}

//in dao class //scenario #1

saveObject(Obj obj){
gethibernatetemplate().save(obj);
}

//scenario #2

saveObject(Obj obj){
session = getHibernateTemplate().getSessionFactory().openSession();
        Transaction tx = session.beginTransaction();
        session.save(obj);
        tx.commit();
}

***scenario #1 does not persists data but scenario #2 working fine. Can someone explain why?

Answer 1

Hibernate Session doesn't work without Transaction in standart configuration. If you add this property <property name="connection.autocommit">true</property> scenario #1 will work .

Answer 2

Because Hibernate doesn't commit the transaction by default. I would recommend to use Spring's Transaction Manager to handle this logic, instead of manual commit/rollback. It automatically commits transaction if everything went fine, and rollbacks the transaction in case of any error. With correct Spring configuration your code will look like:

class ServiceClassType {
   @Transactional 
   public doTask(){
      // update entities with your DAO classes
   }
}