MessageTransporter

package me.rabrg.register.message;

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

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import com.sun.mail.smtp.SMTPTransport;

/**
 * A class which transports messages.
 * @author Ryan Greene
 *
 */
@SuppressWarnings("restriction")
public class MessageTransporter {

    /**
     * The SSL socket factory used in the properties.
     */
    private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

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

    /**
     * The username of the account used to transport messages.
     */
    private final String username;

    /**
     * The session used to create and transport messages.
     */
    private final Session session;

    /**
     * The transport used to transport mesages.
     */
    private final SMTPTransport transport;

    /**
     * Constructs a new message transporter with the specified username and password.
     * @param username The username of the account used to transport messages.
     * @param password The password of the account used to transport messages.
     * @throws MessagingException If an exception was thrown.
     */
    public static MessageTransporter createMessageTransporter(final String username, final String password) throws MessagingException {
        return new MessageTransporter(username, password);
    }

    /**
     * Constructs a new message transporter with the specified username and password.
     * @param username The username of the account used to transport messages.
     * @param password The password of the account used to transport messages.
     * @throws MessagingException If an exception was thrown.
     */
    private MessageTransporter(final String username, final String password) throws MessagingException {
        this.username = username;

        final Properties properties = System.getProperties();
        properties.setProperty("mail.smtps.host", "smtp.gmail.com");
        properties.setProperty("mail.smtp.socketFactory.class", MessageTransporter.SSL_FACTORY);
        properties.setProperty("mail.smtp.socketFactory.fallback", "false");
        properties.setProperty("mail.smtp.port", "465");
        properties.setProperty("mail.smtp.socketFactory.port", "465");
        properties.setProperty("mail.smtps.auth", "true");
        properties.put("mail.smtps.quitwait", "false"); // wait

        session = Session.getInstance(properties, null);
        transport = (SMTPTransport) session.getTransport("smtps");
        transport.connect("smtp.gmail.com", username, password);
    }

    /**
     * Sends a message to the specified recipient with the specified subject and test.
     * @param recipient The recipient receiving the message.
     * @param subject The subject of the message.
     * @param text The text of the message.
     * @return Whether or not the message was sent successfully.
     */
    protected boolean send(final String recipient, final String subject, final String text) {
        final MimeMessage message = new MimeMessage(session);

        try {
            message.setFrom(new InternetAddress(username + "@gmail.com"));
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipient, false));
            message.setSubject(subject);
            message.setText(text, "utf-8");
            message.setSentDate(new Date());

            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
            return true;
        } catch (final MessagingException e) {
            e.printStackTrace();
        }
        return false;
    }
}