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.GregorianCalendar;
  21 import java.util.List;
  22 import javax.ejb.EJB;
  23 import javax.ejb.Stateless;
  24 import javax.persistence.NoResultException;
  25 import javax.persistence.Query;
  26 import org.mxchange.jcontacts.contact.Contact;
  27 import org.mxchange.jcontacts.contact.ContactSessionBeanRemote;
  28 import org.mxchange.jcustomercore.exceptions.CustomerAlreadyRegisteredException;
  29 import org.mxchange.jcustomercore.model.customer.Customer;
  30 import org.mxchange.jcustomercore.utils.CustomerUtils;
  31 import org.mxchange.pizzaaplication.database.BasePizzaDatabaseBean;
  32
  33 /**
  34  * A stateless administrative customer session bean (EJB)
  35  * <p>
  36  * @author Roland Haeder<roland@mxchange.org>
  37  */
  38 @Stateless (name = "admincustomer", description = "Administrative bean handling customer data")
  39 public class PizzaAdminCustomerSessionBean extends BasePizzaDatabaseBean implements PizzaAdminCustomerSessionBeanRemote {
  40
  41         /**
  42          * Serial number
  43          */
  44         private static final long serialVersionUID = 19_845_893_648_175_427L;
  45
  46         /**
  47          * Contact instance
  48          */
  49         @EJB
  50         private ContactSessionBeanRemote contactBean;
  51
  52         /**
  53          * General customer bean
  54          */
  55         @EJB
  56         private RateCalcCustomerSessionBeanRemote customerBean;
  57
  58         @Override
  59         public Customer addCustomer (final Customer customer) throws CustomerAlreadyRegisteredException {
  60                 // Trace message
  61                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("addCustomer: customer={0} - CALLED!", customer)); //NOI18N
  62
  63                 // Paramerter customer should be valid
  64                 if (null == customer) {
  65                         // Throw NPE
  66                         throw new NullPointerException("customer is null"); //NOI18N
  67                 } else if (customer.getCustomerId() > 0) {
  68                         // Not allowed
  69                         throw new IllegalArgumentException(MessageFormat.format("customer.customerId={0} is not allowed here.", customer.getCustomerId())); //NOI18N
  70                 } else if (customer.getCustomerContact() == null) {
  71                         // Throw NPE again
  72                         throw new NullPointerException("customer.customerContact is null"); //NOI18N
  73                 } else if (customer.getCustomerNumber() == null) {
  74                         // Customer numbers should be set, at least generate one with CustomerUtils
  75                         throw new NullPointerException("customer.customerNumber is null"); //NOI18N
  76                 } else if (customer.getCustomerNumber().length() < RateCalcAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_LENGTH) {
  77                         // To short number
  78                         throw new IllegalArgumentException(MessageFormat.format("customer.customerNumber.length={0} is shorter than expected: {1}", customer.getCustomerNumber().length(), RateCalcAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_LENGTH)); //NOI18N
  79                 } else if (this.customerBean.isReqistered(customer)) {
  80                         // Throw exception
  81                         throw new CustomerAlreadyRegisteredException(customer);
  82                 }
  83
  84                 // Get contact instance
  85                 Contact contact = customer.getCustomerContact();
  86                 Contact updatedContact = null;
  87
  88                 // Is a customer found?
  89                 if (this.contactBean.isContactFound(contact)) {
  90                         // Yes, then get updated version
  91                         updatedContact = this.contactBean.updateContactData(contact);
  92
  93                         // Remove it from customer so it won't get persisted again
  94                         customer.setCustomerContact(null);
  95                 }
  96
  97                 // Set created timestamp
  98                 customer.setCustomerCreated(new GregorianCalendar());
  99
 100                 // Persist the customer
 101                 this.getEntityManager().persist(customer);
 102
 103                 // Flush it to get id number set
 104                 this.getEntityManager().flush();
 105
 106                 // Has the contact being updated?
 107                 if (updatedContact instanceof Contact) {
 108                         // Set it again
 109                         customer.setCustomerContact(updatedContact);
 110                 }
 111
 112                 // Trace message
 113                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("addCustomer: customer.customerId={0} - EXIT!", customer.getCustomerId())); //NOI18N
 114
 115                 // Return updated instance
 116                 return customer;
 117         }
 118
 119         @Override
 120         @SuppressWarnings ("unchecked")
 121         public List<Customer> allCustomers () {
 122                 // Trace message
 123                 this.getLoggerBeanLocal().logTrace("allCustomers: CALLED!"); //NOI18N
 124
 125                 // Get named query
 126                 Query query = this.getEntityManager().createNamedQuery("AllCustomers", List.class); //NOI18N
 127
 128                 // Get result
 129                 List<Customer> customers = query.getResultList();
 130
 131                 // Trace message
 132                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("allCustomers: customers.size()={0} - EXIT!", customers.size())); //NOI18N
 133
 134                 // Return full list
 135                 return customers;
 136         }
 137
 138         @Override
 139         public String createCustomerNumber () {
 140                 // Trace message
 141                 this.getLoggerBeanLocal().logTrace("createCustomerNumber: CALLED!"); //NOI18N
 142
 143                 // Init named query
 144                 Query query = this.getEntityManager().createNamedQuery("SearchCustomerByNumber", Customer.class); //NOI18N
 145
 146                 // Default is not found
 147                 String customerNumber = null;
 148
 149                 // Search until a free number was found
 150                 while (null == customerNumber) {
 151                         // Create new number
 152                         String cn = CustomerUtils.generateCustomerNumber(PizzaAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_LENGTH, PizzaAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_BLOCK_SIZE, PizzaAdminCustomerSessionBeanRemote.CUSTOMER_NUMBER_SEPARATOR);
 153
 154                         // Debug message#
 155                         this.getLoggerBeanLocal().logDebug(MessageFormat.format("createCustomerNumber: cn={0}", cn)); //NOI18N
 156
 157                         // Set the generated number as param
 158                         query.setParameter("customerNumber", cn); //NOI18N
 159
 160                         // Try to find it
 161                         try {
 162                                 // Get a single result
 163                                 Customer customer = (Customer) query.getSingleResult();
 164
 165                                 // Debug message
 166                                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("createCustomerNumber: Found customer={0} with customerNumber={1} - continuing ...", customer, customerNumber)); //NOI18N
 167                         } catch (final NoResultException ex) {
 168                                 // Debug message
 169                                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("createCustomerNumber: Found free number {0}, exception message:{1}", cn, ex.getMessage())); //NOI18N
 170
 171                                 // Not found, okay
 172                                 customerNumber = cn;
 173                         }
 174                 }
 175
 176                 // Trace message
 177                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("createCustomerNumber: customerNumber={0} - EXIT!", customerNumber)); //NOI18N
 178
 179                 // Return generated number
 180                 return customerNumber;
 181         }
 182
 183 }