src/java/org/mxchange/pizzaapplication/beans/country/PizzaCountryWebRequestBean.java

   1 /*
   2  * Copyright (C) 2016, 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.country;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Iterator;
  21 import java.util.LinkedList;
  22 import java.util.List;
  23 import javax.annotation.PostConstruct;
  24 import javax.ejb.EJB;
  25 import javax.enterprise.context.RequestScoped;
  26 import javax.enterprise.event.Observes;
  27 import javax.inject.Inject;
  28 import javax.inject.Named;
  29 import org.mxchange.jcountry.events.ObservableAdminAddedCountryEvent;
  30 import org.mxchange.jcountry.model.data.Country;
  31 import org.mxchange.jcountry.model.data.CountrySingletonBeanRemote;
  32 import org.mxchange.pizzaapplication.beans.BasePizzaController;
  33
  34 /**
  35  * A country bean
  36  * <p>
  37  * @author Roland Häder<roland@mxchange.org>
  38  */
  39 @Named ("countryController")
  40 @RequestScoped
  41 public class PizzaCountryWebRequestBean extends BasePizzaController implements PizzaCountryWebRequestController {
  42
  43         /**
  44          * Serial number
  45          */
  46         private static final long serialVersionUID = 176_985_298_681_742_960L;
  47
  48         /**
  49          * Remote country EJB
  50          */
  51         @EJB (lookup = "java:global/jfinancials-ejb/country!org.mxchange.jcountry.data.CountrySingletonBeanRemote")
  52         private CountrySingletonBeanRemote countryBean;
  53
  54         /**
  55          * List of all countries
  56          */
  57         @Inject
  58         @Cached (cacheName = "countryCache")
  59         private transient Cache<Long, Country> countryCache;
  60
  61         /**
  62          * Default constructor
  63          */
  64         public PizzaCountryWebRequestBean () {
  65                 // Call super constructor
  66                 super();
  67         }
  68
  69         /**
  70          * Observing method when the event is fired that an administrator added a
  71          * new country
  72          * <p>
  73          * @param event Event instance
  74          */
  75         public void afterAdminAddedCountryEvent (@Observes final ObservableAdminAddedCountryEvent event) {
  76                 // Is all valid?
  77                 if (null == event) {
  78                         // Throw NPE
  79                         throw new NullPointerException("event is null"); //NOI18N
  80                 } else if (event.getAddedCountry() == null) {
  81                         // Throw again ...
  82                         throw new NullPointerException("event.addedCountry is null"); //NOI18N
  83                 } else if (event.getAddedCountry().getCountryId() == null) {
  84                         // And again ...
  85                         throw new NullPointerException("event.addedCountry.countryId is null"); //NOI18N
  86                 } else if (event.getAddedCountry().getCountryId() < 1) {
  87                         // Id is invalid
  88                         throw new IllegalArgumentException(MessageFormat.format("event.addedCountry.countryId={0} is not valid.", event.getAddedCountry().getCountryId())); //NOI18N
  89                 }
  90
  91                 // Add the event
  92                 this.countryCache.put(event.getAddedCountry().getCountryId(), event.getAddedCountry());
  93         }
  94
  95         @Override
  96         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
  97         public List<Country> allCountries () {
  98                 // Init list
  99                 List<Country> list = new LinkedList<>();
 100
 101                 // Get iterator
 102                 Iterator<Cache.Entry<Long, Country>> iterator = this.countryCache.iterator();
 103
 104                 // Loop over all
 105                 while (iterator.hasNext()) {
 106                         // Get next entry
 107                         final Cache.Entry<Long, Country> next = iterator.next();
 108
 109                         // Add value to list
 110                         list.add(next.getValue());
 111                 }
 112
 113                 // Return it
 114                 return list;
 115         }
 116
 117         /**
 118          * Post-construction method
 119          */
 120         @PostConstruct
 121         public void init () {
 122                 // Is cache there?
 123                 if (!this.countryCache.iterator().hasNext()) {
 124                         // Get whole list
 125                         List<Country> list = this.countryBean.allCountries();
 126
 127                         // Add all
 128                         for (final Iterator<Country> iterator = list.iterator(); iterator.hasNext();) {
 129                                 // Get next element
 130                                 final Country next = iterator.next();
 131
 132                                 // Add it to cache
 133                                 this.countryCache.put(next.getCountryId(), next);
 134                         }
 135                 }
 136         }
 137
 138 }