src/java/org/mxchange/jjobs/beans/country/JobsCountryWebRequestBean.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.jjobs.beans.country;
  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.ejb.EJB;
  26 import javax.enterprise.context.RequestScoped;
  27 import javax.enterprise.event.Observes;
  28 import javax.inject.Inject;
  29 import javax.inject.Named;
  30 import org.mxchange.jcountry.data.Country;
  31 import org.mxchange.jcountry.data.CountrySingletonBeanRemote;
  32 import org.mxchange.jcountry.events.ObservableAdminAddedCountryEvent;
  33 import org.mxchange.jjobs.beans.BaseJobsController;
  34
  35 /**
  36  * A country bean
  37  * <p>
  38  * @author Roland Häder<roland@mxchange.org>
  39  */
  40 @Named ("countryController")
  41 @RequestScoped
  42 public class JobsCountryWebRequestBean extends BaseJobsController implements JobsCountryWebRequestController {
  43
  44         /**
  45          * Serial number
  46          */
  47         private static final long serialVersionUID = 176_985_298_681_742_960L;
  48
  49         /**
  50          * Remote country EJB
  51          */
  52         @EJB (lookup = "java:global/jjobs-ejb/country!org.mxchange.jcountry.data.CountrySingletonBeanRemote")
  53         private CountrySingletonBeanRemote countryBean;
  54
  55         /**
  56          * List of all countries
  57          */
  58         @Inject
  59         @NamedCache (cacheName = "countryCache")
  60         private Cache<Long, Country> countryCache;
  61
  62         /**
  63          * Default constructor
  64          */
  65         public JobsCountryWebRequestBean () {
  66                 // Call super constructor
  67                 super();
  68         }
  69
  70         /**
  71          * Observing method when the event is fired that an administrator added a
  72          * new country
  73          * <p>
  74          * @param event Event instance
  75          */
  76         public void afterAdminAddedCountryEvent (@Observes final ObservableAdminAddedCountryEvent event) {
  77                 // Is all valid?
  78                 if (null == event) {
  79                         // Throw NPE
  80                         throw new NullPointerException("event is null"); //NOI18N
  81                 } else if (event.getAddedCountry() == null) {
  82                         // Throw again ...
  83                         throw new NullPointerException("event.addedCountry is null"); //NOI18N
  84                 } else if (event.getAddedCountry().getCountryId() == null) {
  85                         // And again ...
  86                         throw new NullPointerException("event.addedCountry.countryId is null"); //NOI18N
  87                 } else if (event.getAddedCountry().getCountryId() < 1) {
  88                         // Id is invalid
  89                         throw new IllegalArgumentException(MessageFormat.format("event.addedCountry.countryId={0} is not valid.", event.getAddedCountry().getCountryId())); //NOI18N
  90                 }
  91
  92                 // Add the event
  93                 this.countryCache.put(event.getAddedCountry().getCountryId(), event.getAddedCountry());
  94         }
  95
  96         @Override
  97         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
  98         public List<Country> allCountries () {
  99                 // Init list
 100                 List<Country> list = new LinkedList<>();
 101
 102                 // Get iterator
 103                 Iterator<Cache.Entry<Long, Country>> iterator = this.countryCache.iterator();
 104
 105                 // Loop over all
 106                 while (iterator.hasNext()) {
 107                         // Get next entry
 108                         final Cache.Entry<Long, Country> next = iterator.next();
 109
 110                         // Add value to list
 111                         list.add(next.getValue());
 112                 }
 113
 114                 // Return it
 115                 return list;
 116         }
 117
 118         /**
 119          * Post-construction method
 120          */
 121         @PostConstruct
 122         public void init () {
 123                 // Is cache there?
 124                 if (!this.countryCache.iterator().hasNext()) {
 125                         // Get whole list
 126                         List<Country> list = this.countryBean.allCountries();
 127
 128                         // Add all
 129                         for (final Iterator<Country> iterator = list.iterator(); iterator.hasNext();) {
 130                                 // Get next element
 131                                 final Country next = iterator.next();
 132
 133                                 // Add it to cache
 134                                 this.countryCache.put(next.getCountryId(), next);
 135                         }
 136                 }
 137         }
 138
 139 }