src/org/mxchange/addressbook/validator/user/UserIdValidator.java

   1 /*
   2  * Copyright (C) 2015 Roland Haeder
   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.addressbook.validator.user;
  18
  19 import java.text.MessageFormat;
  20 import java.util.concurrent.ConcurrentHashMap;
  21 import java.util.concurrent.ConcurrentMap;
  22 import javax.ejb.EJB;
  23 import javax.enterprise.event.Observes;
  24 import javax.faces.application.FacesMessage;
  25 import javax.faces.component.UIComponent;
  26 import javax.faces.context.FacesContext;
  27 import javax.faces.validator.FacesValidator;
  28 import javax.faces.validator.Validator;
  29 import javax.faces.validator.ValidatorException;
  30 import org.mxchange.jcoreee.validator.number.BaseLongValidator;
  31 import org.mxchange.jusercore.events.registration.UserRegisteredEvent;
  32 import org.mxchange.jusercore.model.user.User;
  33 import org.mxchange.jusercore.model.user.UserSessionBeanRemote;
  34
  35 /**
  36  * A validator for user ids
  37  * <p>
  38  * @author Roland Haeder
  39  */
  40 @FacesValidator (value = "UserIdValidator")
  41 public class UserIdValidator extends BaseLongValidator implements Validator {
  42
  43         /**
  44          * Serial number
  45          */
  46         private static final long serialVersionUID = 12_869_569_314_764_690L;
  47
  48         /**
  49          * Remote bean
  50          */
  51         @EJB (mappedName = "ejb/stateless-user")
  52         private UserSessionBeanRemote userBean;
  53
  54         /**
  55          * Cached user status
  56          */
  57         private final ConcurrentMap<Long, Boolean> cachedStatus;
  58
  59         /**
  60          * Default constructor
  61          */
  62         public UserIdValidator () {
  63                 // Init map
  64                 this.cachedStatus = new ConcurrentHashMap<>(0);
  65         }
  66
  67         @Override
  68         public void validate (final FacesContext context, final UIComponent component, final Object value) throws ValidatorException {
  69                 // Trace message
  70                 //this.getLogger().logTrace(MessageFormat.format("validate: context={0},component={1},value={2} - CALLED!", context, component, value)); //NOI18N
  71
  72                 // All accepted, required fields
  73                 String[] requiredFileds = {"userId"}; //NOI18N
  74
  75                 // Pre-validation (example: not null, not a string, empty string ...)
  76                 super.preValidate(context, component, value, requiredFileds, false);
  77
  78                 // Cast value
  79                 Long userId = (Long) value;
  80
  81                 // Define variable
  82                 Boolean ifUserExists = false;
  83
  84                 // Is a map entry there?
  85                 if (this.cachedStatus.containsKey(userId)) {
  86                         // Get from cache
  87                         ifUserExists = this.cachedStatus.get(userId);
  88                 } else {
  89                         // Get status
  90                         ifUserExists = this.userBean.ifUserIdExists(userId);
  91
  92                         // Add to cache
  93                         this.cachedStatus.put(userId, ifUserExists);
  94                 }
  95
  96                 // Is the address book id valid?
  97                 if (!ifUserExists) {
  98                         // Is not valid
  99                         throw new ValidatorException(new FacesMessage(MessageFormat.format("No user found with id {0}. Please check your link.", userId))); //NOI18N
 100                 }
 101
 102                 // Trace message
 103                 //this.getLogger().logTrace("validate: EXIT!"); //NOI18N
 104         }
 105
 106         /**
 107          * Event fired when the user registration is complete
 108          * <p>
 109          * @param event User registration event
 110          */
 111         public void afterRegistration (final @Observes UserRegisteredEvent event) {
 112                 // event should not be null
 113                 if (null == event) {
 114                         // Throw NPE
 115                         throw new NullPointerException("event is null"); //NOI18N
 116                 } else if (event.getUser() == null) {
 117                         // Throw NPE again
 118                         throw new NullPointerException("event.user is null"); //NOI18N
 119                 } else if (event.getUser().getUserId() == null) {
 120                         // userId is null
 121                         throw new NullPointerException("event.user.userId is null"); //NOI18N
 122                 } else if (event.getUser().getUserId() < 1) {
 123                         // Not avalid id
 124                         throw new IllegalArgumentException(MessageFormat.format("userId of user={0} is not valid: {1}", event.getUser(), event.getUser().getUserId())); //NOI18N
 125                 }
 126
 127                 // Get user instance
 128                 User registeredUser = event.getUser();
 129
 130                 // Update cache
 131                 this.cachedStatus.put(registeredUser.getUserId(), Boolean.TRUE);
 132         }
 133 }