How to pass variable to Model/Business class

[D. Deepak Sharma]

Hello I am writing a code to validate the credentials of user that is username and user id from my data base and called chkValue(uid, uname) method

The action class code is like this:

package org.deepak.connect.util;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.hibernate.Session;
import org.hibernate.SessionFactory;

public class LoginAction extends Action{

	public ActionForward execute(ActionMapping mapping, ActionForm form, 
								HttpServletRequest request, HttpServletResponse response)throws Exception{

		LoginActionForm lform = (LoginActionForm)form;
		int uid = lform.getUserid();
		String uname = lform.getUsername();
		boolean goodtogo;
		goodtogo = chkValue(uid,uname);
		if(goodtogo==true){
			mapping.findForward("success");
		}
		else mapping.getInputForward();
		//SessionFactory factory = HibernateUtil.createFactory();
		/*Session rsession = HibernateUtil.createSession();
		rsession.beginTransaction();*/
	}
}

here i am getting data from ActionForm class and want that data get authorization from chkValue() method from diff class where I can retrieve data using hibernate from the database
there are 2 main problem

how to pass these parameter to checkValue class

How to retrieve data using Hibernate and write the code for chkValue() method and return value so appropriate mapping can be called.

[Sandy Chatterjee]

Hi,

Create a package named DAO. And create a class named CompareDao.java

Below is the code for CompareDao.java

package dao;

import org.hibernate.Query;
import org.hibernate.Session;
import sand.CreatingTable;
import sand.HibernateUtils;

/**
 *
 * @author Sandy
 */
public class CompareDao {
    public boolean chkValue(String uid,String uname){

        Session session = HibernateUtils.currentSession();
        CreatingTable creatingTable = new CreatingTable();
        try{
            session.beginTransaction();
            
            Query query = session.createQuery("from CreatingTable where userid = :uid and username = :uname");
            query.setString("uid", uid);
            query.setString("uname", uname);
            creatingTable = (CreatingTable)query.uniqueResult();
        }catch(Exception e){
            System.out.println(e.toString());
        }
        finally{
            HibernateUtils.closeSession();
        }
        if(creatingTable != null){
                return true;
            }
            else{
                return false;
            }
    }
}

Here is the code for HibernatePlugin.java

package sand;
import javax.servlet.ServletException;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

/**
 *
 * @author sandy
 */
public class HibernatePlugin implements PlugIn {

   private SessionFactory factory;
   private String path = "/hibernate.cfg.xml";
   private static Class clazz = HibernatePlugin.class;

   public static final String KEY_NAME = clazz.getName();

   public void setPath(String path) {
      this.path = path;
   }

   public void init(ActionServlet servlet, ModuleConfig modConfig)
      throws ServletException {

      try {
            HibernateUtils.createSessionFactory();
        }
        catch (HibernateException e) {
            throw new ServletException(e);}

   }

    public void destroy() {
    try {
    factory.close();
    } catch (HibernateException e) {
    e.printStackTrace();
    }
    }
}

and HibernateUtils.java

package sand;

/**
 *
 * @author sandy
 */
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

public class HibernateUtils {

    private static Log log = LogFactory.getLog(HibernateUtils.class);
    private static SessionFactory sessionFactory;

    
   
    public static void createSessionFactory(){
            sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
    }

    public static final ThreadLocal<Session> session = new ThreadLocal<Session>();

    public static Session currentSession() throws HibernateException {
        Session s = (Session) session.get();
        // Open a new Session, if this Thread has none yet
        if (s == null) {
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }

    public static void closeSession() throws HibernateException {
        Session s = (Session) session.get();
        session.set(null);
        if (s != null)
            s.close();
    }
}

Action class will be the same Action class mentioned by you. Just add the following line to your Action class:

CompareDao cd = new CompareDao();
goodtogo = cd.chkValue(tform.getUserid(), tform.getUsername());

Hope it's clear to you now. If you have any confusions reply back to me.

Also I have answered your previous queries.

Regards,
Sandy