Sending Email from an Enterprise Bean

In the sendNotice method of the ConfirmerEJB class, the lookup method returns a Session object, which represents a mail session. Like a database connection, a mail session is a resource. As with any resource, you must link the coded name (TheMailSession) with a JNDI name in the Resource References dialog box of the New Enterprise Bean Wizard. (See table 9-7). Using the Session object as an argument, the the sendNotice method creates an empty Message object. After calling several set methods on the Message object, sendNotice invokes the send method of the Transport class to send the message on its way. The source code for the sendNotice method follows:

public void sendNotice(String recipient) {

   try {
       Context initial = new InitialContext();
       Session session = 
         (Session) initial.lookup("java:comp/env/TheMailSession");
       
       Message msg = new MimeMessage(session);
       msg.setFrom();

       msg.setRecipients(Message.RecipientType.TO,
          InternetAddress.parse(recipient, false));

       msg.setSubject("Test Message from ConfirmerEJB");
  
       DateFormat dateFormatter = DateFormat.getDateTimeInstance(
          DateFormat.LONG, DateFormat.SHORT);

       Date timeStamp = new Date();
      
       String messageText = "Thank you for your order." + `\n' +
          "We received your order on " + 
          dateFormatter.format(timeStamp) + ".";

       msg.setText(messageText);
       msg.setHeader("X-Mailer", mailer);
       msg.setSentDate(timeStamp);

       Transport.send(msg);

   } catch(Exception e) {
       throw new EJBException(e.getMessage());
   }
}

• Before compiling the ConfirmerClient program, change the value of the recipient variable to an actual email address.
  
  
• In the Resource References dialog box of the New Enterprise Bean wizard, specify the resource reference for the mail session with the values in the following table.
  
  

• In the Resource References tab of the enterprise bean, specify the values in the following table.
  
  

• Use the JNDI names listed in the following table.
  
  

Note: If the application cannot connect to the mail server it will generate this exception:

javax.mail.MessagingException: Could not connect to SMTP host

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