src/java/org/mxchange/pizzaapplication/beans/mobileprovider/PizzaMobileProviderWebRequestBean.java

   1 /*
   2  * Copyright (C) 2016 - 2020 Free Software Foundation
   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.mobileprovider;
  18
  19 import fish.payara.cdi.jsr107.impl.NamedCache;
  20 import java.text.MessageFormat;
  21 import java.util.Comparator;
  22 import java.util.Iterator;
  23 import java.util.LinkedList;
  24 import java.util.List;
  25 import javax.annotation.PostConstruct;
  26 import javax.cache.Cache;
  27 import javax.ejb.EJB;
  28 import javax.enterprise.context.RequestScoped;
  29 import javax.enterprise.event.Observes;
  30 import javax.inject.Inject;
  31 import javax.inject.Named;
  32 import org.mxchange.jphone.events.mobileprovider.added.AdminAddedMobileProviderEvent;
  33 import org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProvider;
  34 import org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProviderSingletonBeanRemote;
  35 import org.mxchange.pizzaapplication.beans.BasePizzaBean;
  36
  37 /**
  38  * A general bean for mobile providers
  39  * <p>
  40  * @author Roland Häder<roland@mxchange.org>
  41  */
  42 @Named ("mobileProviderController")
  43 @RequestScoped
  44 public class PizzaMobileProviderWebRequestBean extends BasePizzaBean implements PizzaMobileProviderWebRequestController {
  45
  46         /**
  47          * Serial number
  48          */
  49         private static final long serialVersionUID = 15_869_423_671_950_276L;
  50
  51         /**
  52          * A list of all mobile providers
  53          */
  54         private final List<MobileProvider> allMobileProviders;
  55
  56         /**
  57          * Remote EJB for mobile providers (regular)
  58          */
  59         @EJB (lookup = "java:global/pizzaservice-ejb/mobileProvider!org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProviderSingletonBeanRemote")
  60         private MobileProviderSingletonBeanRemote mobileProviderBean;
  61
  62         /**
  63          * "Cached" list of mobile providers
  64          */
  65         @Inject
  66         @NamedCache (cacheName = "mobileProviderCache")
  67         private Cache<Long, MobileProvider> mobileProviderCache;
  68
  69         /**
  70          * Default constructor
  71          */
  72         public PizzaMobileProviderWebRequestBean () {
  73                 // Call super constructor
  74                 super();
  75
  76                 // Init list
  77                 this.allMobileProviders = new LinkedList<>();
  78         }
  79
  80         /**
  81          * Observes events being fired after the administrator has added a new
  82          * mobile provider
  83          * <p>
  84          * @param event Event being fired
  85          */
  86         public void afterAdminAddedMobileProviderEvent (@Observes final AdminAddedMobileProviderEvent event) {
  87                 // Is all valid?
  88                 if (null == event) {
  89                         // Throw NPE
  90                         throw new NullPointerException("event is null"); //NOI18N
  91                 } else if (event.getAddedMobileProvider() == null) {
  92                         // Throw again ...
  93                         throw new NullPointerException("event.addedMobileProvider is null"); //NOI18N
  94                 } else if (event.getAddedMobileProvider().getProviderId() == null) {
  95                         // And again ...
  96                         throw new NullPointerException("event.addedMobileProvider.providerId is null"); //NOI18N
  97                 } else if (event.getAddedMobileProvider().getProviderId() < 1) {
  98                         // Id is invalid
  99                         throw new IllegalArgumentException(MessageFormat.format("event.addedMobileProvider.providerId={0} is not valid.", event.getAddedMobileProvider().getProviderId())); //NOI18N
 100                 }
 101
 102                 // Add it to the list
 103                 this.mobileProviderCache.put(event.getAddedMobileProvider().getProviderId(), event.getAddedMobileProvider());
 104                 this.allMobileProviders.add(event.getAddedMobileProvider());
 105         }
 106
 107         @Override
 108         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 109         public List<MobileProvider> allMobileProviders () {
 110                 // Return it
 111                 return this.allMobileProviders;
 112         }
 113
 114         /**
 115          * Post-construction method
 116          */
 117         @PostConstruct
 118         public void init () {
 119                 // Is cache there?
 120                 if (!this.mobileProviderCache.iterator().hasNext()) {
 121                         // Get whole list
 122                         final List<MobileProvider> list = this.mobileProviderBean.allMobileProviders();
 123
 124                         // Add all
 125                         for (final Iterator<MobileProvider> iterator = list.iterator(); iterator.hasNext();) {
 126                                 // Get next element
 127                                 final MobileProvider next = iterator.next();
 128
 129                                 // Add it to cache
 130                                 this.mobileProviderCache.put(next.getProviderId(), next);
 131                         }
 132                 }
 133
 134                 // Is the list empty, but filled cache?
 135                 if (this.allMobileProviders.isEmpty() && this.mobileProviderCache.iterator().hasNext()) {
 136                         // Get iterator
 137                         final Iterator<Cache.Entry<Long, MobileProvider>> iterator = this.mobileProviderCache.iterator();
 138
 139                         // Build up list
 140                         while (iterator.hasNext()) {
 141                                 // GEt next element
 142                                 final Cache.Entry<Long, MobileProvider> next = iterator.next();
 143
 144                                 // Add to list
 145                                 this.allMobileProviders.add(next.getValue());
 146                         }
 147
 148                         // Sort list
 149                         this.allMobileProviders.sort(new Comparator<MobileProvider>() {
 150                                 @Override
 151                                 public int compare (final MobileProvider o1, final MobileProvider o2) {
 152                                         return o1.getProviderId() > o2.getProviderId() ? 1 : o1.getProviderId() < o2.getProviderId() ? -1 : 0;
 153                                 }
 154                         }
 155                         );
 156                 }
 157         }
 158 }