src/main/java/org/apache/maven/plugin/announcement/mailsender/ProjectJavamailMailSender.java

package org.apache.maven.plugin.announcement.mailsender;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.security.Security;
import java.util.Date;
import java.util.Iterator;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import org.codehaus.plexus.mailsender.AbstractMailSender;
import org.codehaus.plexus.mailsender.MailMessage;
import org.codehaus.plexus.mailsender.MailSenderException;
import org.codehaus.plexus.mailsender.util.DateFormatUtils;
import org.codehaus.plexus.util.StringUtils;

/**
 * Helper class for sending email.
 */
public class ProjectJavamailMailSender
    extends AbstractMailSender
{
    private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

    // ----------------------------------------------------------------------
    //
    // ----------------------------------------------------------------------

    private Properties userProperties;

    private Properties props;

    // ----------------------------------------------------------------------
    // Component Lifecycle
    // ----------------------------------------------------------------------

    public void initialize()
    {
        if ( StringUtils.isEmpty( getSmtpHost() ) )
        {
            System.out.println( "Error in configuration: Missing smtpHost." );
        }

        if ( getSmtpPort() == 0 )
        {
            setSmtpPort( DEFAULT_SMTP_PORT );
        }

        props = new Properties();

        props.put( "mail.smtp.host", getSmtpHost() );

        props.put( "mail.smtp.port", String.valueOf( getSmtpPort() ) );

        if ( getUsername() != null )
        {
            props.put( "mail.smtp.auth", "true" );
        }

        props.put( "mail.debug", String.valueOf( getLogger().isDebugEnabled() ) );

        if ( isSslMode() )
        {
            try
            {
                // Try to load the SSL Provider class before we use it, it isn't present in non-Sun JVMs
                this.getClass().getClassLoader().loadClass( "com.sun.net.ssl.internal.ssl.Provider" );

                Security.addProvider( new com.sun.net.ssl.internal.ssl.Provider() );

                props.put( "mail.smtp.socketFactory.port", String.valueOf( getSmtpPort() ) );

                props.put( "mail.smtp.socketFactory.class", SSL_FACTORY );

                props.put( "mail.smtp.socketFactory.fallback", "false" );
            }
            catch ( ClassNotFoundException e )
            {
                getLogger().error( "You can't use sslMode because your system is missing an SSL Provider.", e );
            }
        }
        if ( userProperties != null )
        {
            for (Object o : userProperties.keySet()) {
                String key = (String) o;

                String value = userProperties.getProperty(key);

                props.put(key, value);
            }
        }
    }

    // ----------------------------------------------------------------------
    // MailSender Implementation
    // ----------------------------------------------------------------------

    public void send( MailMessage mail )
        throws MailSenderException
    {
        verify( mail );

        try
        {
            Authenticator auth = null;

            if ( getUsername() != null )
            {
                auth = new Authenticator()
                {
                    protected PasswordAuthentication getPasswordAuthentication()
                    {
                        return new PasswordAuthentication( getUsername(), getPassword() );
                    }
                };
            }

            Session session = Session.getDefaultInstance( props, auth );

            session.setDebug( getLogger().isDebugEnabled() );

            Message msg = new MimeMessage( session );
            InternetAddress addressFrom = new InternetAddress( mail.getFrom().getRfc2822Address() );
            msg.setFrom( addressFrom );

            if ( mail.getToAddresses().size() > 0 )
            {
                InternetAddress[] addressTo = new InternetAddress[mail.getToAddresses().size()];
                int count = 0;
                for (Object o : mail.getToAddresses()) {
                    String address = ((MailMessage.Address) o).getRfc2822Address();
                    addressTo[count++] = new InternetAddress(address);
                }
                msg.setRecipients( Message.RecipientType.TO, addressTo );
            }

            if ( mail.getCcAddresses().size() > 0 )
            {
                InternetAddress[] addressCc = new InternetAddress[mail.getCcAddresses().size()];
                int count = 0;
                for (Object o : mail.getCcAddresses()) {
                    String address = ((MailMessage.Address) o).getRfc2822Address();
                    addressCc[count++] = new InternetAddress(address);
                }
                msg.setRecipients( Message.RecipientType.CC, addressCc );
            }

            if ( mail.getBccAddresses().size() > 0 )
            {
                InternetAddress[] addressBcc = new InternetAddress[mail.getBccAddresses().size()];
                int count = 0;
                for (Object o : mail.getBccAddresses()) {
                    String address = ((MailMessage.Address) o).getRfc2822Address();
                    addressBcc[count++] = new InternetAddress(address);
                }
                msg.setRecipients( Message.RecipientType.BCC, addressBcc );
            }

            // Setting the Subject and Content Type
            msg.setSubject( mail.getSubject() );
            msg.setContent( mail.getContent(), mail.getContentType() == null ? "text/plain" : mail.getContentType() );

            if ( mail.getSendDate() != null )
            {
                msg.setHeader( "Date", DateFormatUtils.getDateHeader( mail.getSendDate() ) );
            }
            else
            {
                msg.setHeader( "Date", DateFormatUtils.getDateHeader( new Date() ) );
            }

            // Send the message
            Transport.send( msg );
        }
        catch ( MessagingException e )
        {
            throw new MailSenderException( "Error while sending mail.", e );
        }
    }
}