customerfacadebean.java

来自「A J2EE & Jsp Example」· Java 代码 · 共 118 行

/*
 *
 * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * The code in this example is offered under the license at: 
 * http://wireless.java.sun.com/berkeley_license.html
 *
 */
package customerejb;
import java.util.*;
import javax.ejb.*;


public class CustomerFacadeBean implements javax.ejb.SessionBean {
    private javax.ejb.SessionContext context;
    private Customer customer = null;
    CustomerHome home = null;
    String jndiCustomerName  = "java:comp/env/ejb/Customer";
    
    /**
     * @see javax.ejb.SessionBean#setSessionContext(javax.ejb.SessionContext)
     */
    public void setSessionContext(javax.ejb.SessionContext aContext) {
        context=aContext;
    }
    
    
    /**
     * @see javax.ejb.SessionBean#ejbActivate()
     */
    public void ejbActivate() {
        
    }
    
    
    /**
     * @see javax.ejb.SessionBean#ejbPassivate()
     */
    public void ejbPassivate() {
        
    }
    
    
    /**
     * @see javax.ejb.SessionBean#ejbRemove()
     */
    public void ejbRemove() {
        
    }
    
    
    /**
     * See section 7.10.3 of the EJB 2.0 specification
     */
    public void ejbCreate() {       
    }
    
    public CustomerTO getCustomer(java.lang.String customerId)throws CustomerException {
        try {
            return getEntity(customerId).getCustomer();
        } catch (Exception e) {        
            throw new CustomerException("Cannot get customer", e);
        }
    }
    
    public CustomerTO createCustomer(CustomerTO customerTO) throws CustomerException {

          try {
            LocalCustomerHome home =  getEntityHome();
            LocalCustomer localCustomer = home.create(customerTO);
            return customerTO;
        } catch (Exception e) {  
            throw new CustomerException("Cannot create customer", e);
        }
    }
    
    public void removeCustomer(java.lang.String customerId)throws CustomerException {
         try {
            getEntity(customerId).remove();
        } catch (Exception e) {
            throw new CustomerException("Cannot remove customer", e);
        }
    }
    

    public void updateCustomer(CustomerTO customerTO) throws CustomerException {
        try {
            LocalCustomer localCustomer =getEntity(customerTO.getCustomerId());
            localCustomer.updateCustomer(customerTO);
        } catch (Exception e) {
            throw new CustomerException("Cannot update customer", e);
        }
    }

    /** Retrieves the local interface of the Customer entity bean. */
    private LocalCustomer getEntity(String customerId)
            throws CustomerException {
        try {
            LocalCustomerHome home = getEntityHome();
            return home.findByPrimaryKey(customerId);
        } catch (Exception e) {
            throw new CustomerException("Cannot locate CustomerHome", e);
        }
    }
    
     /** Retrieves the local home interface of the Customer intity bean. */
    private final LocalCustomerHome getEntityHome()
            throws ServiceLocatorException {
        ServiceLocator locator = ServiceLocator.getInstance();
        LocalCustomerHome home = (LocalCustomerHome) locator.getLocalHome(jndiCustomerName);
        System.out.println( "CustomerFacade: locator.getLocalHome");
        return home;
    }
    
}