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He is an small example to show you how to control the transaction (like starting and committing actions ) .


Code:

package com.codemiles.jpa;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public abstract class JPAService {
    private   EntityManager  entityManager;
    /**
     * @param args
     */
    public void insertTopic(Topic topic){
     EntityManagerFactory factory = Persistence
         .createEntityManagerFactory("persistenceUnitName");
         entityManager = factory.createEntityManager();
         entityManager.getTransaction().begin();
         entityManager.persist(topic);
         entityManager.getTransaction().commit();
         entityManager.close();
         factory.close();
         
    }
 

}

 




_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
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