/*

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

  *

  * The contents of this file are subject to the terms of either the GNU

  * General Public License Version 2 only ("GPL") or the Common

  * Development and Distribution License("CDDL") (collectively, the

  * "License"). You may not use this file except in compliance with the

  * License. You can obtain a copy of the License at

  * http://www.netbeans.org/cddl-gplv2.html

  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

  * specific language governing permissions and limitations under the

  * License.  When distributing the software, include this License Header

  * Notice in each file and include the License file at

  * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Sun in the GPL Version 2 section of the License file that

  * accompanied this code. If applicable, add the following below the

  * License Header, with the fields enclosed by brackets [] replaced by

  * your own identifying information:

  * "Portions Copyrighted [year] [name of copyright owner]"

  *

  * Contributor(s):

  *

  * Portions Copyrighted 2009 Jaroslav Tulach

  */

 package cz.xelfi.quoridor.freemarkerdor;

 import java.io.IOException;

 import java.util.Iterator;

 import java.util.Properties;

 import java.util.ServiceLoader;

 import javax.mail.Message;

 import javax.mail.MessagingException;

 import javax.mail.Session;

 import javax.mail.Transport;

 import javax.mail.internet.InternetAddress;

 import javax.mail.internet.MimeMessage;

 import org.openide.util.Exceptions;

 /** Send emails.

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public abstract class EmailService {

     private static EmailService DEFAULT;

     public abstract void sendEmail(

         String address,

         String subject,

         String text

     ) throws IOException;

     public static synchronized EmailService getDefault() {

         if (DEFAULT == null) {

             Iterator<EmailService> it = ServiceLoader.load(EmailService.class).iterator();

             DEFAULT = it.hasNext() ? it.next() : new Impl();

         }

         return DEFAULT;

     }

     private static class Impl extends EmailService {

         private final Session session;

         public Impl() {

             Properties props = System.getProperties();

             final String host = "mail.smtp.host";

             if (props.get(host) == null) {

                 props.put(host,"localhost");

             }

             session = Session.getDefaultInstance(props, null);

         }

         @Override

         public void sendEmail(String address, String subject, String text) throws IOException {

             try {

                 MimeMessage message = new MimeMessage(session);

                 message.setFrom(new InternetAddress("quoridor@xelfi.cz"));

                 message.addRecipient(Message.RecipientType.TO, new InternetAddress(address));

                 message.setSubject(subject);

                 message.setText(text);

                 Transport.send(message);

             } catch (MessagingException ex) {

                 throw new IOException(ex);

             }

         }

     }

 }