src/java/org/mxchange/jjobs/mailer/model/delivery/JobsMailerSingletonBean.java

   1 /*
   2  * Copyright (C) 2016 - 2018 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.jjobs.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 (name = "mailerBean", description = "A singleton mailer bean, usually called by jfinancialsEmailDelivery queue bean.")
  39 public class JobsMailerSingletonBean extends BaseMailerBean implements DeliverableJobsEmailRemote {
  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 = "jjobsSmtpSession", description = "A Java Mail session")
  55         private Session mailSession;
  56
  57         /**
  58          * Default constructor
  59          */
  60         public JobsMailerSingletonBean () {
  61                 // Invoke super constructor
  62                 super();
  63         }
  64
  65         /**
  66          * Post-construction
  67          */
  68         @PostConstruct
  69         public void init () {
  70                 // Trace message
  71                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.init: CALLED!", this.getClass().getSimpleName())); //NOI18N
  72
  73                 // Try to load bundle
  74                 final ResourceBundle bundle = ResourceBundle.getBundle(this.configFile);
  75
  76                 // Debug message
  77                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("{0}.init: bundle={1}", this.getClass().getSimpleName(), bundle)); //NOI18N
  78
  79                 // The bunble should be valid
  80                 if (null == bundle) {
  81                         // Throw NPE
  82                         throw new NullPointerException(MessageFormat.format("bundle is null, maybe file {0} does not exist?", this.configFile)); //NOI18N
  83                 }
  84
  85                 // Init Properties
  86                 final Properties properties = new Properties();
  87
  88                 // Is the bundle not empty?
  89                 if (!bundle.keySet().isEmpty()) {
  90                         // Loop through all
  91                         for (final String key : bundle.keySet()) {
  92                                 // Log debug message
  93                                 this.getLoggerBeanLocal().logDebug(MessageFormat.format("{0}.init: key={1}", this.getClass().getSimpleName(), key)); //NOI18N
  94
  95                                 // Get string from bundle and set it in properties
  96                                 properties.put(key, bundle.getString(key));
  97                         }
  98                 }
  99
 100                 // Handle it over to the mailer
 101                 this.setProperties(properties);
 102
 103                 // Trace message
 104                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.init: EXIT!", this.getClass().getSimpleName())); //NOI18N
 105         }
 106
 107         @Override
 108         public void sendDeliverableMail (final WrapableEmailDelivery emailWrapper) throws MessagingException {
 109                 // Log trace message
 110                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendDeliverableMail: emailWrapper={1} - CALLED!", this.getClass().getSimpleName(), emailWrapper)); //NOI18N
 111
 112                 // The parameter must be valid
 113                 if (null == emailWrapper) {
 114                         // Throw NPE
 115                         throw new NullPointerException("emailWrapper is null"); //NOI18N
 116                 } else if (emailWrapper.getRecipientAddress() == null) {
 117                         // Throw NPE again
 118                         throw new NullPointerException("emailWrapper.recipientAddress is null"); //NOI18N
 119                 } else if (emailWrapper.getSubjectLine() == null) {
 120                         // ... and again
 121                         throw new NullPointerException("emailWrapper.subjectLine is null"); //NOI18N
 122                 } else if (emailWrapper.getSubjectLine().isEmpty()) {
 123                         // Is empty
 124                         throw new IllegalArgumentException("emailWrapper.subjectLine is empty"); //NOI18N
 125                 } else if (emailWrapper.getTemplateName() == null) {
 126                         // ... and again
 127                         throw new NullPointerException("emailWrapper.templateName is null"); //NOI18N
 128                 } else if (emailWrapper.getTemplateName().isEmpty()) {
 129                         // Is empty
 130                         throw new IllegalArgumentException("emailWrapper.templateName is empty"); //NOI18N
 131                 } else if (emailWrapper.getLocale() == null) {
 132                         // Throw NPE again
 133                         throw new NullPointerException("emailWrapper.locale is null"); //NOI18N
 134                 } else if (!emailWrapper.getTemplateVariables().containsKey("baseUrl")) { //NOI18N
 135                         // Not set
 136                         throw new IllegalArgumentException("emailWrapper.templateVariables.baseUrl is not set"); //NOI18N
 137                 }
 138
 139                 // All required data is set, load template
 140                 Template template = this.getTemplateEngine().getTemplate(String.format("templates/%s/%s.vm", emailWrapper.getLocale().getLanguage().toLowerCase(), emailWrapper.getTemplateName())); //NOI18N
 141
 142                 // Init context
 143                 VelocityContext context = new VelocityContext();
 144
 145                 // Are some variables set?
 146                 if ((emailWrapper.getTemplateVariables() != null) && (!emailWrapper.getTemplateVariables().isEmpty())) {
 147                         // Add all variables
 148                         for (Map.Entry<Object, Object> entry : emailWrapper.getTemplateVariables().entrySet()) {
 149                                 // Get key/value
 150                                 String key = (String) entry.getKey();
 151                                 String value = (String) entry.getValue();
 152
 153                                 // Both should not be empty
 154                                 if (null == key) {
 155                                         // Throw NPE
 156                                         throw new NullPointerException("key is null"); //NOI18N
 157                                 } else if (null == value) {
 158                                         // Throw NPE again
 159                                         throw new NullPointerException(MessageFormat.format("value for key={0} is null", key)); //NOI18N
 160                                 }
 161
 162                                 // Set it
 163                                 context.put(key, value);
 164                         }
 165                 }
 166
 167                 // Send the email
 168                 this.deliverMailWithTemplate(template, context, emailWrapper, this.mailSession);
 169
 170                 // Trace message
 171                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendDeliverableMail: EXIT!", this.getClass().getSimpleName())); //NOI18N
 172         }
 173
 174 }