src/java/org/mxchange/pizzaapplication/model/customer/PizzaAdminCustomerSessionBean.java

   1 /*
   2  * Copyright (C) 2016 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.pizzaapplication.model.customer;
  18
  19 import java.text.MessageFormat;
  20 import java.util.List;
  21 import javax.ejb.Stateless;
  22 import javax.persistence.NoResultException;
  23 import javax.persistence.Query;
  24 import org.mxchange.jcustomercore.model.customer.Customer;
  25 import org.mxchange.jcustomercore.utils.CustomerUtils;
  26 import org.mxchange.pizzaaplication.database.BasePizzaDatabaseBean;
  27
  28 /**
  29  * A stateless administrative customer session bean (EJB)
  30  * <p>
  31  * @author Roland Haeder<roland@mxchange.org>
  32  */
  33 @Stateless (name = "admincustomer", description = "Administrative bean handling customer data")
  34 public class PizzaAdminCustomerSessionBean extends BasePizzaDatabaseBean implements PizzaAdminCustomerSessionBeanRemote {
  35
  36         /**
  37          * Serial number
  38          */
  39         private static final long serialVersionUID = 19_845_893_648_175_427L;
  40
  41         @Override
  42         @SuppressWarnings ("unchecked")
  43         public List<Customer> allCustomers () {
  44                 // Trace message
  45                 this.getLoggerBeanLocal().logTrace("allCustomers: CALLED!"); //NOI18N
  46
  47                 // Get named query
  48                 Query query = this.getEntityManager().createNamedQuery("AllCustomers", List.class); //NOI18N
  49
  50                 // Get result
  51                 List<Customer> customers = query.getResultList();
  52
  53                 // Trace message
  54                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("allCustomers: customers.size()={0} - EXIT!", customers.size())); //NOI18N
  55
  56                 // Return full list
  57                 return customers;
  58         }
  59
  60         @Override
  61         public String createCustomerNumber () {
  62                 // Init named query
  63                 Query query = this.getEntityManager().createNamedQuery("SearchCustomerByNumber", Customer.class); //NOI18N
  64
  65                 // Default is not found
  66                 String customerNumber = null;
  67
  68                 // Search until a free number was found
  69                 while (null == customerNumber) {
  70                         // Create new number
  71                         String cn = CustomerUtils.generateCustomerNumber(PizzaAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_LENGTH, PizzaAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_BLOCK_SIZE, PizzaAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_SEPARATOR);
  72
  73                         // Set the generated number as param
  74                         query.setParameter("customerNumber", cn); //NOI18N
  75
  76                         // Try to find it
  77                         try {
  78                                 // Get a single result
  79                                 Customer customer = (Customer) query.getSingleResult();
  80                         } catch (final NoResultException ex) {
  81                                 // Not found, okay
  82                                 customerNumber = cn;
  83                         }
  84                 }
  85
  86                 // Return generated number
  87                 return customerNumber;
  88         }
  89
  90 }