loginworkflowbean.java

考勤管理系统源码

package com.wiley.compBooks.EJwithUML.TimeCardWorkflow;

import com.wiley.compBooks.EJwithUML.Base.EjbUtil.*;
import com.wiley.compBooks.EJwithUML.TimeCardDomain.*;
import com.wiley.compBooks.EJwithUML.Base.ApplicationExceptions.*;
import java.util.*;
import java.rmi.*;
import javax.ejb.*;
import javax.naming.*;


/**
 * The LoginWorkflow allows client objects to validate users and update their
 * paswords. LoginWorkflowBean is the actual session bean implementation.
 */
public class LoginWorkflowBean extends BasicSessionBean
{
  public void ejbCreate() throws CreateException
  {
    System.out.println("in ejbCreate() of LoginWorkflowBean!");
  }

  public void ejbPostCreate()
  {
    System.out.println("in ejbPostCreate() of LoginWorkflowBean!");
  }

  /** Answers true if the password is correct for the specified user. */
  public boolean isUserValid(String username, String password) throws DataNotFoundException
  {
    UserLocal user = findUser(username);
    return user.isPasswordValid(password);
  }

  /** Answers true if the password is due to be changed. */
  public boolean isPasswordChangeRequired(String username) throws DataNotFoundException
  {
    UserLocal user = findUser(username);
    return user.isPasswordChangeRequired();
  }

  /** Sets the password, if the old password is valid. */
  public void setPassword(String username, String oldPassword, String newPassword)
         throws InvalidDataException, DataNotFoundException
  {
     UserLocal user = findUser(username);
     if (!user.isPasswordValid(oldPassword))
     {
       throw new InvalidDataException(Origin.LOGIN_WORKFLOW, "Old password is invalid.");
     }
     user.setPassword(newPassword);
  }

  private UserLocal findUser(String username) throws DataNotFoundException
  {
    try
    {
      Context initialContext = getInitialContext();
      UserLocalHome uhome = (UserLocalHome)initialContext.lookup(EjbReferenceNames.USER_HOME);
      Collection users = uhome.findByUserName(username);
      UserLocal user = null;
      if (users.isEmpty())
      {
        throw new DataNotFoundException(Origin.LOGIN_WORKFLOW, "User(" + username + ") Not Found");
      }
      else
      {
        user = (UserLocal) users.iterator().next();
      }
      return user;
    }
    catch (NamingException e)
    {
      throw new DataNotFoundException(Origin.LOGIN_WORKFLOW, e, "User Bean Not Found");
    }
    catch (FinderException e)
    {
      throw new DataNotFoundException(Origin.LOGIN_WORKFLOW, e, "User(" + username + ") Not Found");
    }
  }
}