src/java/org/mxchange/addressbook/mailer/model/delivery/AddressbookMailerSingletonBean.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 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.mailer.model.delivery;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Map;
  21 import java.util.Properties;
  22 import java.util.ResourceBundle;
  23 import javax.annotation.PostConstruct;
  24 import javax.annotation.Resource;
  25 import javax.ejb.Singleton;
  26 import javax.mail.MessagingException;
  27 import javax.mail.Session;
  28 import org.apache.velocity.Template;
  29 import org.apache.velocity.VelocityContext;
  30 import org.mxchange.jmailee.model.delivery.BaseMailerBean;
  31 import org.mxchange.jmailee.model.delivery.wrapper.WrapableEmailDelivery;
  32
  33 /**
  34  * A singleton mailer EJB
  35  * <p>
  36  * @author Roland Häder<roland@mxchange.org>
  37  */
  38 @Singleton
  39 public class AddressbookMailerSingletonBean extends BaseMailerBean implements DeliverableAddressbookEmailLocal {
  40
  41         /**
  42          * Serial number
  43          */
  44         private static final long serialVersionUID = 17_857_816_596_030_918L;
  45
  46         /**
  47          * Configuration file
  48          */
  49         private final String configFile = "org.mxchange.jmailer.config"; //NOI18N//NOI18N
  50
  51         /**
  52          * Email session
  53          */
  54         @Resource (name = "addressbookSmtpSession", description = "A Java Mail session")
  55         private Session mailSession;
  56
  57         /**
  58          * Default constructor
  59          * <p>
  60          */
  61         public AddressbookMailerSingletonBean () {
  62         }
  63
  64         /**
  65          * Post-construction
  66          */
  67         @PostConstruct
  68         public void init () {
  69                 // Trace message
  70                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.init: CALLED!", this.getClass().getSimpleName())); //NOI18N
  71
  72                 // Try to load bundle
  73                 ResourceBundle bundle = ResourceBundle.getBundle(this.configFile);
  74
  75                 // Debug message
  76                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("{0}.init: bundle={1}", this.getClass().getSimpleName(), bundle)); //NOI18N
  77
  78                 // The bunble should be valid
  79                 if (null == bundle) {
  80                         // Throw NPE
  81                         throw new NullPointerException(MessageFormat.format("bundle is null, maybe file {0} does not exist?", this.configFile)); //NOI18N
  82                 }
  83
  84                 // Init Properties
  85                 Properties properties = new Properties();
  86
  87                 // Is the bundle not empty?
  88                 if (!bundle.keySet().isEmpty()) {
  89                         // Loop through all
  90                         for (final String key : bundle.keySet()) {
  91                                 // Log debug message
  92                                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("{0}.init: key={1}", this.getClass().getSimpleName(), key)); //NOI18N
  93
  94                                 // Get string from bundle and set it in properties
  95                                 properties.put(key, bundle.getString(key));
  96                         }
  97                 }
  98
  99                 // Handle it over to the mailer
 100                 this.setProperties(properties);
 101
 102                 // Trace message
 103                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.init: EXIT!", this.getClass().getSimpleName())); //NOI18N
 104         }
 105
 106         @Override
 107         public void sendDeliverableMail (final WrapableEmailDelivery emailWrapper) throws MessagingException {
 108                 // Log trace message
 109                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendDeliverableMail: emailWrapper={1} - CALLED!", this.getClass().getSimpleName(), emailWrapper)); //NOI18N
 110
 111                 // The parameter must be valid
 112                 if (null == emailWrapper) {
 113                         // Throw NPE
 114                         throw new NullPointerException("emailWrapper is null"); //NOI18N
 115                 } else if (emailWrapper.getRecipientAddress() == null) {
 116                         // Throw NPE again
 117                         throw new NullPointerException("emailWrapper.recipientAddress is null"); //NOI18N
 118                 } else if (emailWrapper.getSubjectLine() == null) {
 119                         // ... and again
 120                         throw new NullPointerException("emailWrapper.subjectLine is null"); //NOI18N
 121                 } else if (emailWrapper.getSubjectLine().isEmpty()) {
 122                         // Is empty
 123                         throw new IllegalArgumentException("emailWrapper.subjectLine is empty"); //NOI18N
 124                 } else if (emailWrapper.getTemplateName() == null) {
 125                         // ... and again
 126                         throw new NullPointerException("emailWrapper.templateName is null"); //NOI18N
 127                 } else if (emailWrapper.getTemplateName().isEmpty()) {
 128                         // Is empty
 129                         throw new IllegalArgumentException("emailWrapper.templateName is empty"); //NOI18N
 130                 } else if (emailWrapper.getLocale() == null) {
 131                         // Throw NPE again
 132                         throw new NullPointerException("emailWrapper.locale is null"); //NOI18N
 133                 } else if (!emailWrapper.getTemplateVariables().containsKey("baseUrl")) { //NOI18N
 134                         // Not set
 135                         throw new IllegalArgumentException("emailWrapper.templateVariables.baseUrl is not set"); //NOI18N
 136                 }
 137
 138                 // All required data is set, load template
 139                 Template template = this.getTemplateEngine().getTemplate(String.format("templates/%s/%s.vm", emailWrapper.getLocale().getLanguage().toLowerCase(), emailWrapper.getTemplateName())); //NOI18N
 140
 141                 // Init context
 142                 VelocityContext context = new VelocityContext();
 143
 144                 // Are some variables set?
 145                 if ((emailWrapper.getTemplateVariables() != null) && (!emailWrapper.getTemplateVariables().isEmpty())) {
 146                         // Add all variables
 147                         for (Map.Entry<Object, Object> entry : emailWrapper.getTemplateVariables().entrySet()) {
 148                                 // Get key/value
 149                                 String key = (String) entry.getKey();
 150                                 String value = (String) entry.getValue();
 151
 152                                 // Both should not be empty
 153                                 if (null == key) {
 154                                         // Throw NPE
 155                                         throw new NullPointerException("key is null"); //NOI18N
 156                                 } else if (null == value) {
 157                                         // Throw NPE again
 158                                         throw new NullPointerException(MessageFormat.format("value for key={0} is null", key)); //NOI18N
 159                                 }
 160
 161                                 // Set it
 162                                 context.put(key, value);
 163                         }
 164                 }
 165
 166                 // Send the email
 167                 this.deliverMailWithTemplate(template, context, emailWrapper, this.mailSession);
 168
 169                 // Trace message
 170                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendDeliverableMail: EXIT!", this.getClass().getSimpleName())); //NOI18N
 171         }
 172
 173 }