src/java/org/mxchange/pizzaapplication/beans/mobileprovider/PizzaMobileProviderWebRequestBean.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.mobileprovider;
  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.jphone.events.mobileprovider.added.AdminAddedMobileProviderEvent;
  32 import org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProvider;
  33 import org.mxchange.jphone.model.phonenumbers.mobileprovider.MobileProviderSingletonBeanRemote;
  34 import org.mxchange.pizzaapplication.beans.BasePizzaController;
  35
  36 /**
  37  * A general bean for mobile providers
  38  * <p>
  39  * @author Roland Häder<roland@mxchange.org>
  40  */
  41 @Named ("mobileProviderController")
  42 @RequestScoped
  43 public class PizzaMobileProviderWebRequestBean extends BasePizzaController implements PizzaMobileProviderWebRequestController {
  44
  45         /**
  46          * Serial number
  47          */
  48         private static final long serialVersionUID = 15_869_423_671_950_276L;
  49
  50         /**
  51          * Remote EJB for mobile providers (regular)
  52          */
  53         @EJB (lookup = "java:global/jfinancials-ejb/mobileprovider!org.mxchange.jphone.phonenumbers.mobileprovider.MobileProviderSingletonBeanRemote")
  54         private MobileProviderSingletonBeanRemote mobileProviderBean;
  55
  56         /**
  57          * "Cached" list of mobile providers
  58          */
  59         @Inject
  60         @NamedCache (cacheName = "mobileProviderCache")
  61         private Cache<Long, MobileProvider> mobileProviderCache;
  62
  63         /**
  64          * Default constructor
  65          */
  66         public PizzaMobileProviderWebRequestBean () {
  67                 // Call super constructor
  68                 super();
  69         }
  70
  71         /**
  72          * Observes events being fired after the administrator has added a new
  73          * mobile provider
  74          * <p>
  75          * @param event Event being fired
  76          */
  77         public void afterAdminAddedMobileProviderEvent (@Observes final AdminAddedMobileProviderEvent event) {
  78                 // Is all valid?
  79                 if (null == event) {
  80                         // Throw NPE
  81                         throw new NullPointerException("event is null"); //NOI18N
  82                 } else if (event.getAddedMobileProvider() == null) {
  83                         // Throw again ...
  84                         throw new NullPointerException("event.addedMobileProvider is null"); //NOI18N
  85                 } else if (event.getAddedMobileProvider().getProviderId() == null) {
  86                         // And again ...
  87                         throw new NullPointerException("event.addedMobileProvider.providerId is null"); //NOI18N
  88                 } else if (event.getAddedMobileProvider().getProviderId() < 1) {
  89                         // Id is invalid
  90                         throw new IllegalArgumentException(MessageFormat.format("event.addedMobileProvider.providerId={0} is not valid.", event.getAddedMobileProvider().getProviderId())); //NOI18N
  91                 }
  92
  93                 // Add it to the list
  94                 this.mobileProviderCache.put(event.getAddedMobileProvider().getProviderId(), event.getAddedMobileProvider());
  95         }
  96
  97         @Override
  98         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
  99         public List<MobileProvider> allMobileProviders () {
 100                 // Init list
 101                 final List<MobileProvider> list = new LinkedList<>();
 102
 103                 // Get iterator
 104                 final Iterator<Cache.Entry<Long, MobileProvider>> iterator = this.mobileProviderCache.iterator();
 105
 106                 // Loop over all
 107                 while (iterator.hasNext()) {
 108                         // Get next entry
 109                         final Cache.Entry<Long, MobileProvider> next = iterator.next();
 110
 111                         // Add value to list
 112                         list.add(next.getValue());
 113                 }
 114
 115                 // Return it
 116                 return list;
 117         }
 118
 119         /**
 120          * Post-construction method
 121          */
 122         @PostConstruct
 123         public void init () {
 124                 // Is cache there?
 125                 if (!this.mobileProviderCache.iterator().hasNext()) {
 126                         // Get whole list
 127                         final List<MobileProvider> list = this.mobileProviderBean.allMobileProviders();
 128
 129                         // Add all
 130                         for (final Iterator<MobileProvider> iterator = list.iterator(); iterator.hasNext();) {
 131                                 // Get next element
 132                                 final MobileProvider next = iterator.next();
 133
 134                                 // Add it to cache
 135                                 this.mobileProviderCache.put(next.getProviderId(), next);
 136                         }
 137                 }
 138         }
 139
 140 }