src/java/org/mxchange/jjobs/validator/user/JobsUserIdValidator.java

   1 /*
   2  * Copyright (C) 2016 Roland Häder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (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 General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jjobs.validator.user;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Set;
  21 import java.util.TreeSet;
  22 import javax.enterprise.event.Observes;
  23 import javax.faces.application.FacesMessage;
  24 import javax.faces.component.UIComponent;
  25 import javax.faces.context.FacesContext;
  26 import javax.faces.convert.ConverterException;
  27 import javax.faces.validator.FacesValidator;
  28 import javax.faces.validator.Validator;
  29 import javax.faces.validator.ValidatorException;
  30 import javax.naming.Context;
  31 import javax.naming.InitialContext;
  32 import javax.naming.NamingException;
  33 import org.mxchange.jcoreee.validator.number.BaseLongValidator;
  34 import org.mxchange.jusercore.events.registration.ObservableUserRegisteredEvent;
  35 import org.mxchange.jusercore.model.user.User;
  36 import org.mxchange.jusercore.model.user.UserSessionBeanRemote;
  37
  38 /**
  39  * A validator for user ids
  40  * <p>
  41  * @author Roland Häder<roland@mxchange.org>
  42  */
  43 @FacesValidator ("UserIdValidator")
  44 public class JobsUserIdValidator extends BaseLongValidator implements Validator {
  45
  46         /**
  47          * Cached user status
  48          */
  49         private static final Set<Long> cachedStatus = new TreeSet<>();
  50
  51         /**
  52          * Serial number
  53          */
  54         private static final long serialVersionUID = 12_869_569_314_764_690L;
  55
  56         /**
  57          * Remote bean
  58          */
  59         private UserSessionBeanRemote userBean;
  60
  61         /**
  62          * Initialization of this converter
  63          */
  64         public JobsUserIdValidator () {
  65                 // Try to get it
  66                 try {
  67                         // Get initial context
  68                         Context context = new InitialContext();
  69
  70                         // ... and user controller
  71                         this.userBean = (UserSessionBeanRemote) context.lookup("java:global/jjobs-ejb/user!org.mxchange.jusercore.model.user.UserSessionBeanRemote"); //NOI18N
  72                 } catch (final NamingException ex) {
  73                         // Continue to throw it
  74                         throw new ConverterException(MessageFormat.format("context.lookup() failed: {0}", ex.getMessage()), ex); //NOI18N
  75                 }
  76         }
  77
  78         /**
  79          * Event fired when the user registration is complete
  80          * <p>
  81          * @param event User registration event
  82          */
  83         public void afterUserRegistrationEvent (@Observes final ObservableUserRegisteredEvent event) {
  84                 // Trace message
  85                 // NOISY-DEBUG: this.loggerBeanLocal.logTrace(MessageFormat.format("UserIdValidator:afterRegistrationEvent: event={0} - CALLED!", event)); //NOI18N
  86
  87                 // event should not be null
  88                 if (null == event) {
  89                         // Throw NPE
  90                         throw new NullPointerException("event is null"); //NOI18N
  91                 } else if (event.getRegisteredUser() == null) {
  92                         // Throw NPE again
  93                         throw new NullPointerException("event.user is null"); //NOI18N
  94                 } else if (event.getRegisteredUser().getUserId() == null) {
  95                         // userId is null
  96                         throw new NullPointerException("event.user.userId is null"); //NOI18N
  97                 } else if (event.getRegisteredUser().getUserId() < 1) {
  98                         // Not avalid id
  99                         throw new IllegalArgumentException(MessageFormat.format("userId of user={0} is not valid: {1}", event.getRegisteredUser(), event.getRegisteredUser().getUserId())); //NOI18N
 100                 }
 101
 102                 // Get user instance
 103                 User registeredUser = event.getRegisteredUser();
 104
 105                 // Debug message
 106                 // NOISY-DEBUG: this.loggerBeanLocal.logDebug(MessageFormat.format("UserIdValidator:afterRegistrationEvent: registeredUser={0}", registeredUser)); //NOI18N
 107
 108                 // Update cache
 109                 JobsUserIdValidator.cachedStatus.add(registeredUser.getUserId());
 110
 111                 // Trace message
 112                 // NOISY-DEBUG: this.loggerBeanLocal.logTrace("UserIdValidator:afterRegistrationEvent: EXIT!"); //NOI18N
 113         }
 114
 115         @Override
 116         public void validate (final FacesContext context, final UIComponent component, final Object value) throws ValidatorException {
 117                 // Trace message
 118                 // NOISY-DEBUG: this.loggerBeanLocal.logTrace(MessageFormat.format("validate: context={0},component={1},value={2} - CALLED!", context, component, value)); //NOI18N
 119
 120                 // All accepted, required fields
 121                 String[] requiredFields = {"userId"}; //NOI18N
 122
 123                 // Pre-validation (example: not null, not a string, empty string ...)
 124                 super.preValidate(context, component, value, requiredFields, false);
 125
 126                 // Cast value
 127                 Long userId = (Long) value;
 128
 129                 // Define variable
 130                 Boolean ifUserExists;
 131
 132                 // Is a map entry there?
 133                 if (JobsUserIdValidator.cachedStatus.contains(userId)) {
 134                         // Get from cache
 135                         ifUserExists = Boolean.TRUE;
 136                 } else {
 137                         // Get status
 138                         ifUserExists = this.userBean.ifUserIdExists(userId);
 139                 }
 140
 141                 // Is the user id valid?
 142                 if (!ifUserExists) {
 143                         // Is not valid
 144                         throw new ValidatorException(new FacesMessage(MessageFormat.format("No user found with id {0}. Please check your link.", userId))); //NOI18N
 145                 }
 146
 147                 // Add to cache if valid
 148                 JobsUserIdValidator.cachedStatus.add(userId);
 149
 150                 // Trace message
 151                 // NOISY-DEBUG: this.loggerBeanLocal.logTrace("validate: EXIT!"); //NOI18N
 152         }
 153
 154 }