protected SendMailJob.MailInfo createMailInfo() 
{
        return new MailInfo();
}

 public  void execute(JobExecutionContext context) throws JobExecutionException 
{
    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Interface.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */
        JobDataMap data = context.getMergedJobDataMap();
        MailInfo mailInfo = populateMailInfo(data, createMailInfo());
        getLog().info("Sending message " + mailInfo);
        try {
            MimeMessage mimeMessage = prepareMimeMessage(mailInfo);
            Transport.send(mimeMessage);
        } catch (MessagingException e) {
            throw new JobExecutionException("Unable to send mail: " + mailInfo,
                    e, false);
        }
}

 protected Log getLog() 
{
        return log;
}

 protected Session getMailSession(SendMailJob.MailInfo mailInfo) throws MessagingException 
{
        Properties properties = new Properties();
        properties.put("mail.smtp.host", mailInfo.getSmtpHost());
        return Session.getDefaultInstance(properties, null);
}

 protected String getOptionalParm(JobDataMap data,
    String property) 
{
        String value = data.getString(property);
        if ((value != null) && (value.trim().length() == 0)) {
            return null;
        }
        return value;
}

 protected String getRequiredParm(JobDataMap data,
    String property,
    String constantName) 
{
        String value = getOptionalParm(data, property);
        if (value == null) {
            throw new IllegalArgumentException(constantName + " not specified.");
        }
        return value;
}

 protected SendMailJob.MailInfo populateMailInfo(JobDataMap data,
    SendMailJob.MailInfo mailInfo) 
{
        // Required parameters
        mailInfo.setSmtpHost(getRequiredParm(data, PROP_SMTP_HOST, "PROP_SMTP_HOST"));
        mailInfo.setTo(getRequiredParm(data, PROP_RECIPIENT, "PROP_RECIPIENT"));
        mailInfo.setFrom(getRequiredParm(data, PROP_SENDER, "PROP_SENDER"));
        mailInfo.setSubject(getRequiredParm(data, PROP_SUBJECT, "PROP_SUBJECT"));
        mailInfo.setMessage(getRequiredParm(data, PROP_MESSAGE, "PROP_MESSAGE"));
        // Optional parameters
        mailInfo.setReplyTo(getOptionalParm(data, PROP_REPLY_TO));
        mailInfo.setCc(getOptionalParm(data, PROP_CC_RECIPIENT));
        mailInfo.setContentType(getOptionalParm(data, PROP_CONTENT_TYPE));
        return mailInfo;
}

 protected MimeMessage prepareMimeMessage(SendMailJob.MailInfo mailInfo) throws MessagingException 
{
        Session session = getMailSession(mailInfo);
        MimeMessage mimeMessage = new MimeMessage(session);
        Address[] toAddresses = InternetAddress.parse(mailInfo.getTo());
        mimeMessage.setRecipients(Message.RecipientType.TO, toAddresses);
        if (mailInfo.getCc() != null) {
            Address[] ccAddresses = InternetAddress.parse(mailInfo.getCc());
            mimeMessage.setRecipients(Message.RecipientType.CC, ccAddresses);
        }
        mimeMessage.setFrom(new InternetAddress(mailInfo.getFrom()));
        if (mailInfo.getReplyTo() != null) {
            mimeMessage.setReplyTo(new InternetAddress[]{new InternetAddress(mailInfo.getReplyTo())});
        }
        mimeMessage.setSubject(mailInfo.getSubject());
        mimeMessage.setSentDate(new Date());
        setMimeMessageContent(mimeMessage, mailInfo);
        return mimeMessage;
}

 protected  void setMimeMessageContent(MimeMessage mimeMessage,
    SendMailJob.MailInfo mailInfo) throws MessagingException 
{
        if (mailInfo.getContentType() == null) {
            mimeMessage.setText(mailInfo.getMessage());
        } else {
            mimeMessage.setContent(mailInfo.getMessage(), mailInfo.getContentType());
        }
}