src/java/org/mxchange/jjobs/beans/business/opening_time/JobsOpeningTimeWebRequestBean.java

   1 /*
   2  * Copyright (C) 2017 - 2020 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.jjobs.beans.business.opening_time;
  18
  19 import fish.payara.cdi.jsr107.impl.NamedCache;
  20 import java.text.MessageFormat;
  21 import java.util.Comparator;
  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.jcontactsbusiness.events.opening_time.added.ObservableOpeningTimeAddedEvent;
  32 import org.mxchange.jcontactsbusiness.exceptions.opening_time.OpeningTimeNotFoundException;
  33 import org.mxchange.jcontactsbusiness.model.opening_time.OpeningTime;
  34 import org.mxchange.jcontactsbusiness.model.opening_time.OpeningTimeSessionBeanRemote;
  35 import org.mxchange.jjobs.beans.BaseJobsBean;
  36
  37 /**
  38  * A general bean for opening times
  39  * <p>
  40  * @author Roland Häder<roland@mxchange.org>
  41  */
  42 @Named ("openingTimeController")
  43 @RequestScoped
  44 public class JobsOpeningTimeWebRequestBean extends BaseJobsBean implements JobsOpeningTimeWebRequestController {
  45
  46         /**
  47          * Serial number
  48          */
  49         private static final long serialVersionUID = 5_028_697_360_462L;
  50
  51         /**
  52          * A list of all opening times
  53          */
  54         private final List<OpeningTime> allOpeningTimes;
  55
  56         /**
  57          * A list of filtered opening times
  58          */
  59         private List<OpeningTime> filteredOpeningTimes;
  60
  61         /**
  62          * EJB for administrative purposes
  63          */
  64         @EJB (lookup = "java:global/jjobs-ejb/openingTimes!org.mxchange.jcontactsbusiness.model.opening_time.OpeningTimeSessionBeanRemote")
  65         private OpeningTimeSessionBeanRemote openingTimesBean;
  66
  67         /**
  68          * A list of all opening times (globally)
  69          */
  70         @Inject
  71         @NamedCache (cacheName = "openingTimesCache")
  72         private Cache<Long, OpeningTime> openingTimesCache;
  73
  74         /**
  75          * Default constructor
  76          */
  77         public JobsOpeningTimeWebRequestBean () {
  78                 // Call super constructor
  79                 super();
  80
  81                 // Init list
  82                 this.allOpeningTimes = new LinkedList<>();
  83         }
  84
  85         /**
  86          * Observes events being thrown when a new opening time has been added
  87          * <p>
  88          * @param event Event being fired
  89          */
  90         public void afterOpeningTimeAddedEvent (@Observes final ObservableOpeningTimeAddedEvent event) {
  91                 // Validate parameter
  92                 if (null == event) {
  93                         // Throw NPE
  94                         throw new NullPointerException("event is null");
  95                 } else if (event.getOpeningTime() == null) {
  96                         // Throw it again
  97                         throw new NullPointerException("event.openingTime is null");
  98                 } else if (event.getOpeningTime().getOpeningId() == null) {
  99                         // Throw it again
 100                         throw new NullPointerException("event.openingTime.openingId is null");
 101                 } else if (event.getOpeningTime().getOpeningId() < 1) {
 102                         // Throw it again
 103                         throw new NullPointerException(MessageFormat.format("event.openingTime.openingId={0} is invalid", event.getOpeningTime().getOpeningId()));
 104                 }
 105
 106                 // Add to cache and list
 107                 this.openingTimesCache.put(event.getOpeningTime().getOpeningId(), event.getOpeningTime());
 108                 this.allOpeningTimes.add(event.getOpeningTime());
 109         }
 110
 111         @Override
 112         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 113         public List<OpeningTime> allOpeningTimes () {
 114                 return this.allOpeningTimes;
 115         }
 116
 117         @Override
 118         public OpeningTime findOpeningTimeById (final Long openingId) throws OpeningTimeNotFoundException {
 119                 // Validate parameter
 120                 if (null == openingId) {
 121                         // Throw NPE
 122                         throw new NullPointerException("openingId is null"); //NOI18N
 123                 } else if (openingId < 1) {
 124                         // Throw IAE
 125                         throw new IllegalArgumentException("openingId=" + openingId + " is invalid"); //NOI18N
 126                 } else if (!this.openingTimesCache.containsKey(openingId)) {
 127                         // Not found
 128                         throw new OpeningTimeNotFoundException(openingId);
 129                 }
 130
 131                 // Get it from cache
 132                 final OpeningTime opening = this.openingTimesCache.get(openingId);
 133
 134                 // Return it
 135                 return opening;
 136         }
 137
 138         /**
 139          * Getter for a list of filtered opening times
 140          * <p>
 141          * @return Filtered opening times
 142          */
 143         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
 144         public List<OpeningTime> getFilteredOpeningTimes () {
 145                 return this.filteredOpeningTimes;
 146         }
 147
 148         /**
 149          * Setter for a list of filtered opening times
 150          * <p>
 151          * @param filteredOpeningTimes Filtered opening times
 152          */
 153         @SuppressWarnings ("AssignmentToCollectionOrArrayFieldFromParameter")
 154         public void setFilteredOpeningTimes (final List<OpeningTime> filteredOpeningTimes) {
 155                 this.filteredOpeningTimes = filteredOpeningTimes;
 156         }
 157
 158         /**
 159          * Initializer method
 160          */
 161         @PostConstruct
 162         public void initializeList () {
 163                 // Is cache there?
 164                 if (!this.openingTimesCache.iterator().hasNext()) {
 165                         // Add all
 166                         for (final OpeningTime openingTime : this.openingTimesBean.allOpeningTimes()) {
 167                                 // Add it to cache
 168                                 this.openingTimesCache.put(openingTime.getOpeningId(), openingTime);
 169                         }
 170                 }
 171
 172                 // Is the list empty, but filled cache?
 173                 if (this.allOpeningTimes.isEmpty() && this.openingTimesCache.iterator().hasNext()) {
 174                         // Build up list
 175                         for (final Cache.Entry<Long, OpeningTime> currentEntry : this.openingTimesCache) {
 176                                 // Add to list
 177                                 this.allOpeningTimes.add(currentEntry.getValue());
 178                         }
 179
 180                         // Sort list
 181                         this.allOpeningTimes.sort(new Comparator<OpeningTime>() {
 182                                 @Override
 183                                 public int compare (final OpeningTime openingTime1, final OpeningTime openingTime2) {
 184                                         return openingTime1.getOpeningId() > openingTime2.getOpeningId() ? 1 : openingTime1.getOpeningId() < openingTime2.getOpeningId() ? -1 : 0;
 185                                 }
 186                         }
 187                         );
 188                 }
 189         }
 190
 191 }