MailLog

MailLog is used to send out emails with/without attachments. It is particularly useful in scenarios wherein the application needs to send out an email to people specifying the error/warn/info messages and also send the log files as attachments for further debugging.

/*
MailLog
*/


import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

/**
 * MailLog will create a multipart message with the second
 * block of the message being the given file.

 *
 * This demonstrates how to use the FileDataSource to send
 * a file via mail.

 *
 * usage: java MailLog to from smtp file true|false
 * where to and from are the destination and
 * origin email addresses, respectively, and smtp
 * is the hostname of the machine that has smtp server
 * running.  file is the file to send. The next parameter
 * either turns on or turns off debugging during sending.
 *
 */
/**
   Method sendMailWithoutAttachment() to send mails without attachment
 */
public class MailLog {

 private String mailTo[] = null;
 private String mailFrom = null;
 private String host = null;
 private String attachmentFileName = null;
 private String subject = null;
 private String msgText1 = null;
 private boolean debugFlag = true;

 public MailLog(
  String[] theMailTo,
  String theMailFrom,
  String theHost,
  String theAttachmentFileName,
  String theSubject,
  String theMsgText1,
  boolean theDebugFlag) {

  mailTo = theMailTo;
  mailFrom = theMailFrom;
  host = theHost;
  attachmentFileName = theAttachmentFileName;
  subject = theSubject;

  msgText1 = theMsgText1;
  debugFlag = theDebugFlag;

 }

 /**
  * Constructor to send mails without attachment.
  */
 public MailLog(
  String[] theMailTo,
  String theMailFrom,
  String theHost,
  String theSubject,
  String theMsgText1,
  boolean theDebugFlag) {

  mailTo = theMailTo;
  mailFrom = theMailFrom;
  host = theHost;
  subject = theSubject;
  msgText1 = theMsgText1;
  debugFlag = theDebugFlag;

 }

 public void setMailTo(String[] theMailTo) {

  mailTo = theMailTo;
 }

 public void setMailFrom(String theMailFrom) {

  mailFrom = theMailFrom;

 }

 public void setHost(String theHost) {

  host = theHost;

 }

 public void setAttachmentFileName(String theAttachmentFileName) {
  attachmentFileName = theAttachmentFileName;
 }

 public void setSubject(String theSubject) {
  subject = theSubject;
 }

 public void setMsgText(String theMsgText) {
  msgText1 = theMsgText;
 }

 public String[] getMailTo() {
  return mailTo;
 }

 public String getMailFrom() {
  return mailFrom;
 }

 public String getHost() {
  return host;
 }

 public String getAttachmentFileName() {
  return attachmentFileName;
 }

 public String getSubject() {
  return subject;

 }

 public String getMsgText() {
  return msgText1;
 }

 public static void main(String[] args) throws Exception {
  String To[] =
   { "abc@123.com", "123@abc.net" };
  MailLog oMailer =
   new MailLog(
    To,
    "abc@123.com",
    "10.1.1.122",
    "test.txt",
    "Subject:Testing Mail System.out.println",
    "Body: Testing MailLog",
    true);
  System.out.println("Sending a mail");
  oMailer.sendMail();
  System.out.println("Sent a mail attachment");

 }

 public void sendMail() throws Exception {

  // create some properties and get the default Session
  Properties props = System.getProperties();
  props.put("mail.smtp.host", host);

  Session session = Session.getDefaultInstance(props, null);
  session.setDebug(debugFlag);

  try {
   // create a message
   MimeMessage msg = new MimeMessage(session);
   msg.setFrom(new InternetAddress(mailFrom));
   InternetAddress[] address = new InternetAddress[mailTo.length];
   for (int count = 0; count < mailTo.length; count++) {
    address[count] = new InternetAddress(mailTo[count]);
   }
   msg.setRecipients(Message.RecipientType.TO, address);
   msg.setSubject(subject);

   // create and fill the first message part
   MimeBodyPart mbp1 = new MimeBodyPart();
   mbp1.setText(msgText1);

   // create the second message part
   MimeBodyPart mbp2 = new MimeBodyPart();

   // attach the file to the message
   FileDataSource fds = new FileDataSource(attachmentFileName);
   mbp2.setDataHandler(new DataHandler(fds));
   mbp2.setFileName(fds.getName());

   // create the Multipart and its parts to it
   Multipart mp = new MimeMultipart();
   mp.addBodyPart(mbp1);
   mp.addBodyPart(mbp2);

   // add the Multipart to the message
   msg.setContent(mp);

   // set the Date: header
   msg.setSentDate(new Date());

   // send the message
   Transport.send(msg);

  } catch (MessagingException mex) {
   mex.printStackTrace();
   Exception ex = null;
   if ((ex = mex.getNextException()) != null) {
    ex.printStackTrace();
   }
   throw new Exception(mex.getMessage());
  }

  //end
 }

 /**
  * Method to send mails without attachment
  */
 public void sendMailWithoutAttachment() throws Exception {

  // create some properties and get the default Session
  System.out.println("Entering : MailLog : sendMailWithoutAttachment");
  Properties props = System.getProperties();
  props.put("mail.smtp.host", host);

  Session session = Session.getDefaultInstance(props, null);
  session.setDebug(debugFlag);

  try {
   // create a message
   MimeMessage msg = new MimeMessage(session);
   msg.setFrom(new InternetAddress(mailFrom));
   InternetAddress[] address = new InternetAddress[mailTo.length];
   for (int count = 0; count < mailTo.length; count++) {
    address[count] = new InternetAddress(mailTo[count]);
   }
   msg.setRecipients(Message.RecipientType.TO, address);
   msg.setSubject(subject);

   // create and fill the first message part
   MimeBodyPart mbp1 = new MimeBodyPart();
   mbp1.setText(msgText1);

   // create the second message part
   MimeBodyPart mbp2 = new MimeBodyPart();

   // create the Multipart and its parts to it
   Multipart mp = new MimeMultipart();
   mp.addBodyPart(mbp1);

   // add the Multipart to the message
   msg.setContent(mp);

   // set the Date: header
   msg.setSentDate(new Date());

   // send the message
   Transport.send(msg);

  } catch (MessagingException mex) {
   System.out.println(
    "Exception in sendMailWithoutAttachement method"
     + mex.getMessage());
   mex.printStackTrace();
   Exception ex = null;
   if ((ex = mex.getNextException()) != null) {
    ex.printStackTrace();
   }
   throw new Exception(mex.getMessage());
  }

  //end
  System.out.println("Leaving : MailLog : sendMailWithoutAttachment");
 } //end of method sendMailWithoutAttachment()

}