src/java/org/mxchange/addressbook/mailer/model/delivery/AddressbookMailerSingletonBean.java

   1 /*
   2  * Copyright (C) 2016 - 2022 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 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.apache.velocity.context.Context;
  31 import org.mxchange.jmailee.model.delivery.BaseMailerBean;
  32 import org.mxchange.jmailee.model.delivery.wrapper.WrapableEmailDelivery;
  33
  34 /**
  35  * A singleton mailer EJB
  36  * <p>
  37  * @author Roland Häder<roland@mxchange.org>
  38  */
  39 @Singleton (name = "mailerBean", description = "A singleton mailer bean, usually called by jfinancialsEmailDelivery queue bean.")
  40 public class AddressbookMailerSingletonBean extends BaseMailerBean implements DeliverableAddressbookEmailRemote {
  41
  42         /**
  43          * Serial number
  44          */
  45         private static final long serialVersionUID = 17_857_816_596_030_918L;
  46
  47         /**
  48          * Configuration file
  49          */
  50         private final String configFile = "org.mxchange.jmailer.config"; //NOI18N
  51
  52         /**
  53          * Email session
  54          */
  55         @Resource (name = "addressbookSmtpSession", description = "A Java Mail session")
  56         private Session mailSession;
  57
  58         /**
  59          * Default constructor
  60          */
  61         public AddressbookMailerSingletonBean () {
  62                 // Invoke super constructor
  63                 super();
  64         }
  65
  66         /**
  67          * Post-construction
  68          */
  69         @PostConstruct
  70         public void init () {
  71                 // Trace message
  72                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.init: CALLED!", this.getClass().getSimpleName())); //NOI18N
  73
  74                 // Try to load bundle
  75                 final ResourceBundle bundle = ResourceBundle.getBundle(this.configFile);
  76
  77                 // Debug message
  78                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("{0}.init: bundle={1}", this.getClass().getSimpleName(), bundle)); //NOI18N
  79
  80                 // The bunble should be valid
  81                 if (null == bundle) {
  82                         // Throw NPE
  83                         throw new NullPointerException(MessageFormat.format("bundle is null, maybe file {0} does not exist?", this.configFile)); //NOI18N
  84                 }
  85
  86                 // Init Properties
  87                 final Properties properties = new Properties();
  88
  89                 // Is the bundle not empty?
  90                 if (!bundle.keySet().isEmpty()) {
  91                         // Loop through all
  92                         for (final String key : bundle.keySet()) {
  93                                 // Log debug message
  94                                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("{0}.init: key={1}", this.getClass().getSimpleName(), key)); //NOI18N
  95
  96                                 // Get string from bundle and set it in properties
  97                                 properties.put(key, bundle.getString(key));
  98                         }
  99                 }
 100
 101                 // Handle it over to the mailer
 102                 this.setProperties(properties);
 103
 104                 // Trace message
 105                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.init: EXIT!", this.getClass().getSimpleName())); //NOI18N
 106         }
 107
 108         @Override
 109         public void sendDeliverableMail (final WrapableEmailDelivery emailWrapper) throws MessagingException {
 110                 // Log trace message
 111                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendDeliverableMail: emailWrapper={1} - CALLED!", this.getClass().getSimpleName(), emailWrapper)); //NOI18N
 112
 113                 // The parameter must be valid
 114                 if (null == emailWrapper) {
 115                         // Throw NPE
 116                         throw new NullPointerException("emailWrapper is null"); //NOI18N
 117                 } else if (emailWrapper.getRecipientAddress() == null) {
 118                         // Throw NPE again
 119                         throw new NullPointerException("emailWrapper.recipientAddress is null"); //NOI18N
 120                 } else if (emailWrapper.getSubjectLine() == null) {
 121                         // ... and again
 122                         throw new NullPointerException("emailWrapper.subjectLine is null"); //NOI18N
 123                 } else if (emailWrapper.getSubjectLine().isEmpty()) {
 124                         // Is empty
 125                         throw new IllegalArgumentException("emailWrapper.subjectLine is empty"); //NOI18N
 126                 } else if (emailWrapper.getTemplateName() == null) {
 127                         // ... and again
 128                         throw new NullPointerException("emailWrapper.templateName is null"); //NOI18N
 129                 } else if (emailWrapper.getTemplateName().isEmpty()) {
 130                         // Is empty
 131                         throw new IllegalArgumentException("emailWrapper.templateName is empty"); //NOI18N
 132                 } else if (emailWrapper.getLocale() == null) {
 133                         // Throw NPE again
 134                         throw new NullPointerException("emailWrapper.locale is null"); //NOI18N
 135                 } else if (!emailWrapper.getTemplateVariables().containsKey("baseUrl")) { //NOI18N
 136                         // Not set
 137                         throw new IllegalArgumentException("emailWrapper.templateVariables.baseUrl is not set"); //NOI18N
 138                 }
 139
 140                 // All required data is set, load template
 141                 final Template template = this.getTemplateEngine().getTemplate(String.format("templates/%s/%s.vm", emailWrapper.getLocale().getLanguage().toLowerCase(), emailWrapper.getTemplateName())); //NOI18N
 142
 143                 // Init context
 144                 final Context context = new VelocityContext();
 145
 146                 // Are some variables set?
 147                 if ((emailWrapper.getTemplateVariables() != null) && (!emailWrapper.getTemplateVariables().isEmpty())) {
 148                         // Add all variables
 149                         for (Map.Entry<Object, Object> entry : emailWrapper.getTemplateVariables().entrySet()) {
 150                                 // Get key/value
 151                                 String key = (String) entry.getKey();
 152                                 String value = (String) entry.getValue();
 153
 154                                 // Both should not be empty
 155                                 if (null == key) {
 156                                         // Throw NPE
 157                                         throw new NullPointerException("key is null"); //NOI18N
 158                                 } else if (null == value) {
 159                                         // Throw NPE again
 160                                         throw new NullPointerException(MessageFormat.format("value for key={0} is null", key)); //NOI18N
 161                                 }
 162
 163                                 // Set it
 164                                 context.put(key, value);
 165                         }
 166                 }
 167
 168                 // Send the email
 169                 this.deliverMailWithTemplate(template, context, emailWrapper, this.mailSession);
 170
 171                 // Trace message
 172                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendDeliverableMail: EXIT!", this.getClass().getSimpleName())); //NOI18N
 173         }
 174
 175 }