signonejb.java

《J2EE企业级应用开发》一书的配套源代码

package com.j2eeapp.cdstore.signon;

import java.rmi.RemoteException;
import javax.ejb.*;
import javax.naming.*;
import com.j2eeapp.cdstore.util.*;


public class SignonEJB implements SessionBean
{
    /**
     * Attributes declaration
    */
    public SessionContext EJB_Context = null;
    private InitialContext ic = null;

    private UserLocalHome ulh;
    
    /**
     * @J2EE_METHOD  --  SignonEJB
     */
    public SignonEJB    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbCreate
     * Called by the container to create a session bean instance. Its parameters typically
     * contain the information the client uses to customize the bean instance for its use.
     * It requires a matching pair in the bean class and its home interface.
     */
    public void ejbCreate    ()  
    { 
    	 try { 
        ic = new InitialContext();
        ulh = (UserLocalHome) ic.lookup(JNDINames.USER);
        } catch (NamingException ne) {
         throw new EJBException("SignOnEJB Got naming exception! " + ne.getMessage());
      }


    }
    
    /**
     * @J2EE_METHOD  --  ejbRemove
     * A container invokes this method before it ends the life of the session object. This
     * happens as a result of a client's invoking a remove operation, or when a container
     * decides to terminate the session object after a timeout. This method is called with
     * no transaction context.
     */
    public void ejbRemove    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbActivate
     * The activate method is called when the instance is activated from its 'passive' state.
     * The instance should acquire any resource that it has released earlier in the ejbPassivate()
     * method. This method is called with no transaction context.
     */
    public void ejbActivate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbPassivate
     * The passivate method is called before the instance enters the 'passive' state. The
     * instance should release any resources that it can re-acquire later in the ejbActivate()
     * method. After the passivate method completes, the instance must be in a state that
     * allows the container to use the Java Serialization protocol to externalize and store
     * away the instance's state. This method is called with no transaction context.
     */
    public void ejbPassivate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  setSessionContext
     * Set the associated session context. The container calls this method after the instance
     * creation. The enterprise Bean instance should store the reference to the context
     * object in an instance variable. This method is called with no transaction context.
     */
    public void setSessionContext    (SessionContext sc)  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  authenticate
     */
    public boolean authenticate    (String userName, String password)  
    { 
  		 try {
        UserLocal user = ulh.findByPrimaryKey(userName);
            return user.matchPassword(password);
        } catch (FinderException fe) {
            return false; // User not found, so authentication failed.
        } 
    
    }
    
      
    /**
     * @J2EE_METHOD  --  createUser
     */
    public void createUser    (String userName, String password) throws CreateException {
      UserLocal user = ulh.create(userName, password);            
    }
}