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MailTool.java

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package net.threebit.utils.sosc;

/*
        Copyright 2003 Shawn Deleurme
        Copyright 2003 Kevin O'Donnell

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program; if not, write to the Free Software
        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

import java.io.*;
import java.sql.*;
import java.util.*;
import javax.mail.*;
import javax.mail.event.*;
import javax.mail.internet.*; 

public class MailTool {

        private static Session session = null;
        private static Provider provider = null;
        private static Transport smtp = null;
        private static TransportListener listener = null;

        public synchronized static void init() throws Exception {
                try {
                        if (session == null) session = Session.getDefaultInstance(new Properties());
                        if (provider == null) provider = session.getProvider("smtp");
                        if (smtp == null) smtp = session.getTransport("smtp");
                        if (listener == null) {
                                smtp.addTransportListener(
                                        listener = new TransportListener() {
                                                public void messageDelivered(TransportEvent e) {
                                                        System.out.println("messageDelivered: " + e);
                                                }
                                                public void messageNotDelivered(TransportEvent e) {
                                                        System.out.println("messageNotDelivered: " + e);
                                                }
                                                public void messagePartiallyDelivered(TransportEvent e) {
                                                        System.out.println("messagePartiallyDelivered: " + e);
                                                }
                                        }
                                );
                        }
                }
                catch (NoSuchProviderException e) {
                        throw(e); // rethrow for now
                }
        }

        public static MailMessage newMessage() throws Exception {
                init();
                return new MailMessage(new MimeMessage(session));
        }

        public static void send (MailMessage message) throws Exception {
                init();
                if (message.message == null) throw new Exception("No MimeMessage!"); 
                // TODO: implement a work queue to avoid this thread being blocked while
                // the delivery is taking place.
                smtp.send(message.message);
        }

}

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