src/java/org/mxchange/pizzaapplication/beans/business/branchoffice/PizzaBranchOfficeWebRequestBean.java

   1 /*
   2  * Copyright (C) 2017 Roland Häder
   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.beans.business.branchoffice;
  18
  19 import fish.payara.cdi.jsr107.impl.NamedCache;
  20 import java.text.MessageFormat;
  21 import java.util.Iterator;
  22 import java.util.LinkedList;
  23 import java.util.List;
  24 import javax.annotation.PostConstruct;
  25 import javax.cache.Cache;
  26 import javax.ejb.EJB;
  27 import javax.enterprise.context.RequestScoped;
  28 import javax.enterprise.event.Observes;
  29 import javax.inject.Inject;
  30 import javax.inject.Named;
  31 import org.mxchange.jcontactsbusiness.events.branchoffice.added.ObservableBranchOfficeAddedEvent;
  32 import org.mxchange.jcontactsbusiness.model.branchoffice.BranchOffice;
  33 import org.mxchange.jcontactsbusiness.model.branchoffice.BranchOfficeSessionBeanRemote;
  34 import org.mxchange.pizzaapplication.beans.BasePizzaController;
  35
  36 /**
  37  * A general bean for branch offices
  38  * <p>
  39  * @author Roland Häder<roland@mxchange.org>
  40  */
  41 @Named ("branchOfficeController")
  42 @RequestScoped
  43 public class PizzaBranchOfficeWebRequestBean extends BasePizzaController implements PizzaBranchOfficeWebRequestController {
  44
  45         /**
  46          * Serial number
  47          */
  48         private static final long serialVersionUID = 5_028_697_360_461L;
  49
  50         /**
  51          * EJB for administrative purposes
  52          */
  53         @EJB (lookup = "java:global/jfinancials-ejb/branchOffice!org.mxchange.jcontactsbusiness.model.branchoffice.BranchOfficeSessionBeanRemote")
  54         private BranchOfficeSessionBeanRemote branchOfficeBean;
  55
  56         /**
  57          * A list of all branch offices (globally)
  58          */
  59         @Inject
  60         @NamedCache (cacheName = "branchOfficeCache")
  61         private Cache<Long, BranchOffice> branchOfficeCache;
  62
  63         /**
  64          * Default constructor
  65          */
  66         public PizzaBranchOfficeWebRequestBean () {
  67                 // Call super constructor
  68                 super();
  69         }
  70
  71         /**
  72          * Observes events being fired when a branch office has been added.
  73          * <p>
  74          * @param event Event being fired
  75          * <p>
  76          * @throws NullPointerException If the parameter or it's carried instance is null
  77          * @throws IllegalArgumentException If the branchId is zero or lower
  78          */
  79         public void afterBranchOfficeAddedEvent (@Observes final ObservableBranchOfficeAddedEvent event) {
  80                 // Validate parameter
  81                 if (null == event) {
  82                         // Throw NPE
  83                         throw new NullPointerException("event is null"); //NOI18N
  84                 } else if (event.getBranchOffice() == null) {
  85                         // Throw NPE again
  86                         throw new NullPointerException("event.branchOffice is null"); //NOI18N
  87                 } else if (event.getBranchOffice().getBranchId() == null) {
  88                         // Throw it again
  89                         throw new NullPointerException("event.branchOffice.branchId is null"); //NOI18N
  90                 } else if (event.getBranchOffice().getBranchId() < 1) {
  91                         // Throw IAE
  92                         throw new IllegalArgumentException(MessageFormat.format("event.branchOffice.branchId={0} is not valid", event.getBranchOffice().getBranchId())); //NOI18N
  93                 }
  94
  95                 // Add instance to cache
  96                 this.branchOfficeCache.put(event.getBranchOffice().getBranchId(), event.getBranchOffice());
  97         }
  98
  99         @Override
 100         public List<BranchOffice> allBranchOffices () {
 101                 // Init list
 102                 final List<BranchOffice> list = new LinkedList<>();
 103
 104                 // Get iterator
 105                 final Iterator<Cache.Entry<Long, BranchOffice>> iterator = this.branchOfficeCache.iterator();
 106
 107                 // Loop over all
 108                 while (iterator.hasNext()) {
 109                         // Get next entry
 110                         final Cache.Entry<Long, BranchOffice> next = iterator.next();
 111
 112                         // Add value to list
 113                         list.add(next.getValue());
 114                 }
 115
 116                 // Return it
 117                 return list;
 118         }
 119
 120         /**
 121          * Initializer method
 122          */
 123         @PostConstruct
 124         public void initializeList () {
 125                 // Is cache there?
 126                 if (!this.branchOfficeCache.iterator().hasNext()) {
 127                         // Get whole list
 128                         final List<BranchOffice> list = this.branchOfficeBean.allBranchOffices();
 129
 130                         // Add all
 131                         for (final Iterator<BranchOffice> iterator = list.iterator(); iterator.hasNext();) {
 132                                 // Get next element
 133                                 final BranchOffice next = iterator.next();
 134
 135                                 // Add it to cache
 136                                 this.branchOfficeCache.put(next.getBranchId(), next);
 137                         }
 138                 }
 139         }
 140
 141 }