src/java/org/mxchange/jfinancials/beans/mobileprovider/FinancialsMobileProviderWebRequestBean.java

   1 /*
   2  * Copyright (C) 2016 - 2018 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.jfinancials.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.jfinancials.beans.BaseFinancialsBean;
  33 import org.mxchange.jphone.events.mobileprovider.added.AdminAddedMobileProviderEvent;
  34 import org.mxchange.jphone.exceptions.mobileprovider.MobileProviderNotFoundException;
  35 import org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProvider;
  36 import org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProviderSingletonBeanRemote;
  37
  38 /**
  39  * A general bean for mobile providers
  40  * <p>
  41  * @author Roland Häder<roland@mxchange.org>
  42  */
  43 @Named ("mobileProviderController")
  44 @RequestScoped
  45 public class FinancialsMobileProviderWebRequestBean extends BaseFinancialsBean implements FinancialsMobileProviderWebRequestController {
  46
  47         /**
  48          * Serial number
  49          */
  50         private static final long serialVersionUID = 15_869_423_671_950_276L;
  51
  52         /**
  53          * A list of all mobile providers
  54          */
  55         private final List<MobileProvider> allMobileProviders;
  56
  57         /**
  58          * A list of filtered mobile providers
  59          */
  60         private List<MobileProvider> filteredMobileProviders;
  61
  62         /**
  63          * Remote EJB for mobile providers (regular)
  64          */
  65         @EJB (lookup = "java:global/jfinancials-ejb/mobileProvider!org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProviderSingletonBeanRemote")
  66         private MobileProviderSingletonBeanRemote mobileProviderBean;
  67
  68         /**
  69          * "Cached" list of mobile providers
  70          */
  71         @Inject
  72         @NamedCache (cacheName = "mobileProviderCache")
  73         private Cache<Long, MobileProvider> mobileProviderCache;
  74
  75         /**
  76          * Default constructor
  77          */
  78         public FinancialsMobileProviderWebRequestBean () {
  79                 // Call super constructor
  80                 super();
  81
  82                 // Init list
  83                 this.allMobileProviders = new LinkedList<>();
  84         }
  85
  86         /**
  87          * Observes events being fired after the administrator has added a new
  88          * mobile provider
  89          * <p>
  90          * @param event Event being fired
  91          */
  92         public void afterAdminAddedMobileProviderEvent (@Observes final AdminAddedMobileProviderEvent event) {
  93                 // Is all valid?
  94                 if (null == event) {
  95                         // Throw NPE
  96                         throw new NullPointerException("event is null"); //NOI18N
  97                 } else if (event.getAddedMobileProvider() == null) {
  98                         // Throw again ...
  99                         throw new NullPointerException("event.addedMobileProvider is null"); //NOI18N
 100                 } else if (event.getAddedMobileProvider().getProviderId() == null) {
 101                         // And again ...
 102                         throw new NullPointerException("event.addedMobileProvider.providerId is null"); //NOI18N
 103                 } else if (event.getAddedMobileProvider().getProviderId() < 1) {
 104                         // Id is invalid
 105                         throw new IllegalArgumentException(MessageFormat.format("event.addedMobileProvider.providerId={0} is not valid.", event.getAddedMobileProvider().getProviderId())); //NOI18N
 106                 }
 107
 108                 // Add it to the list
 109                 this.mobileProviderCache.put(event.getAddedMobileProvider().getProviderId(), event.getAddedMobileProvider());
 110                 this.allMobileProviders.add(event.getAddedMobileProvider());
 111         }
 112
 113         @Override
 114         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 115         public List<MobileProvider> allMobileProviders () {
 116                 // Return it
 117                 return this.allMobileProviders;
 118         }
 119
 120         @Override
 121         public MobileProvider findMobileProviderById (final Long mobileProviderId) throws MobileProviderNotFoundException {
 122                 // Validate parameter
 123                 if (null == mobileProviderId) {
 124                         // Throw NPE
 125                         throw new NullPointerException("mobileProviderId is null"); //NOI18N
 126                 } else if (mobileProviderId < 1) {
 127                         // Throw IAE
 128                         throw new IllegalArgumentException("mobileProviderId=" + mobileProviderId + " is invalid."); //NOI18N
 129                 } else if (!this.mobileProviderCache.containsKey(mobileProviderId)) {
 130                         // Not found
 131                         throw new MobileProviderNotFoundException(mobileProviderId);
 132                 }
 133
 134                 // Get it from cache
 135                 final MobileProvider mobileProvider = this.mobileProviderCache.get(mobileProviderId);
 136
 137                 // Return it
 138                 return mobileProvider;
 139         }
 140
 141         /**
 142          * Getter for filtered mobile provider list
 143          * <p>
 144          * @return Filtered mobile providers
 145          */
 146         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 147         public List<MobileProvider> getFilteredMobileProviders () {
 148                 return this.filteredMobileProviders;
 149         }
 150
 151         /**
 152          * Getter for filtered mobile provider list
 153          * <p>
 154          * @param filteredMobileProviders Filtered mobile providers
 155          */
 156         @SuppressWarnings ("AssignmentToCollectionOrArrayFieldFromParameter")
 157         public void setFilteredMobileProviders (final List<MobileProvider> filteredMobileProviders) {
 158                 this.filteredMobileProviders = filteredMobileProviders;
 159         }
 160
 161         /**
 162          * Post-construction method
 163          */
 164         @PostConstruct
 165         public void initCache () {
 166                 // Is cache there?
 167                 if (!this.mobileProviderCache.iterator().hasNext()) {
 168                         // Get whole list
 169                         final List<MobileProvider> mobileProviders = this.mobileProviderBean.allMobileProviders();
 170
 171                         // Add all
 172                         for (final MobileProvider mobileProvider : mobileProviders) {
 173                                 // Add it to cache
 174                                 this.mobileProviderCache.put(mobileProvider.getProviderId(), mobileProvider);
 175                         }
 176                 }
 177
 178                 // Is the list empty, but filled cache?
 179                 if (this.allMobileProviders.isEmpty() && this.mobileProviderCache.iterator().hasNext()) {
 180                         // Get iterator
 181                         final Iterator<Cache.Entry<Long, MobileProvider>> iterator = this.mobileProviderCache.iterator();
 182
 183                         // Build up list
 184                         while (iterator.hasNext()) {
 185                                 // GEt next element
 186                                 final Cache.Entry<Long, MobileProvider> next = iterator.next();
 187
 188                                 // Add to list
 189                                 this.allMobileProviders.add(next.getValue());
 190                         }
 191
 192                         // Sort list
 193                         this.allMobileProviders.sort(new Comparator<MobileProvider>() {
 194                                 @Override
 195                                 public int compare (final MobileProvider o1, final MobileProvider o2) {
 196                                         return o1.getProviderId() > o2.getProviderId() ? 1 : o1.getProviderId() < o2.getProviderId() ? -1 : 0;
 197                                 }
 198                         });
 199                 }
 200         }
 201 }