src/java/org/mxchange/jjobs/beans/country/JobsCountryWebApplicationBean.java

   1 /*
   2  * Copyright (C) 2016 Roland Haeder
   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 java.text.MessageFormat;
  20 import java.util.List;
  21 import javax.annotation.PostConstruct;
  22 import javax.enterprise.context.ApplicationScoped;
  23 import javax.enterprise.event.Observes;
  24 import javax.faces.view.facelets.FaceletException;
  25 import javax.inject.Named;
  26 import javax.naming.Context;
  27 import javax.naming.InitialContext;
  28 import javax.naming.NamingException;
  29 import org.mxchange.jcountry.data.Country;
  30 import org.mxchange.jcountry.data.CountrySingletonBeanRemote;
  31 import org.mxchange.jcountry.events.AdminAddedCountryEvent;
  32
  33 /**
  34  * A country bean
  35  * <p>
  36  * @author Roland Haeder<roland@mxchange.org>
  37  */
  38 @Named ("country")
  39 @ApplicationScoped
  40 public class JobsCountryWebApplicationBean implements JobsCountryWebApplicationController {
  41
  42         /**
  43          * Serial number
  44          */
  45         private static final long serialVersionUID = 176_985_298_681_742_960L;
  46
  47         /**
  48          * Remote country EJB
  49          */
  50         private CountrySingletonBeanRemote countryBean;
  51
  52         /**
  53          * List of all countries
  54          */
  55         private List<Country> countryList;
  56
  57         /**
  58          * Default constructor
  59          */
  60         public JobsCountryWebApplicationBean () {
  61                 // Try this
  62                 try {
  63                         // Get initial context
  64                         Context context = new InitialContext();
  65
  66                         // Try to lookup the bean
  67                         this.countryBean = (CountrySingletonBeanRemote) context.lookup("java:global/jjobs-ejb/country!org.mxchange.jcountry.data.CountrySingletonBeanRemote"); //NOI18N
  68                 } catch (final NamingException ex) {
  69                         // Continue to throw
  70                         throw new FaceletException(ex);
  71                 }
  72         }
  73
  74         @Override
  75         public void afterAdminAddedCountry (@Observes final AdminAddedCountryEvent 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.countryList.add(event.getAddedCountry());
  93         }
  94
  95         @Override
  96         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
  97         public List<Country> allCountries () {
  98                 // Return "cached" version
  99                 return this.countryList;
 100         }
 101
 102         /**
 103          * Post-initialization of this class
 104          */
 105         @PostConstruct
 106         public void init () {
 107                 // "Cache" country list as this will not change so often.
 108                 this.countryList = this.countryBean.allCountries();
 109         }
 110 }