com.basicservice.service.MailService.java Source code

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Here is the source code for com.basicservice.service.MailService.java

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/**
*    This file is part of Basic Service.
*
*    Basic Service 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 3 of the License, or
*    (at your option) any later version.
*
*    Basic Service 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 Basic Service (See GPL.txt).  If not, see <http://www.gnu.org/licenses/>.
*    
*    If needed the author is Amir Zucker and can be reached at zucksoft@gmail.com 
*/
package com.basicservice.service;

import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

/**
 * A service for sending emails (using an external service such as Cloudbees-sendGrid or google smtp api)
 */

@Service
public class MailService {
    private static final Logger LOG = LoggerFactory.getLogger(MailService.class);

    private String smtpHost;
    private String sendGridUsername;
    private String sendGridPassword;

    public String getSmtpHost() {
        return smtpHost;
    }

    public void setSmtpHost(String smtpHost) {
        this.smtpHost = smtpHost;
    }

    public String getSendGridUsername() {
        return sendGridUsername;
    }

    public void setSendGridUsername(String sendGridUsername) {
        this.sendGridUsername = sendGridUsername;
    }

    public String getSendGridPassword() {
        return sendGridPassword;
    }

    public void setSendGridPassword(String sendGridPassword) {
        this.sendGridPassword = sendGridPassword;
    }

    public void sendEmail(String from, String to, String subject, String messageHtml) throws Exception {
        try {
            Properties props = new Properties();
            props.put("mail.transport.protocol", "smtp");
            props.put("mail.smtp.host", smtpHost);
            props.put("mail.smtp.port", 587);
            props.put("mail.smtp.auth", "true");
            Authenticator auth = new SMTPAuthenticator();
            Session mailSession = Session.getDefaultInstance(props, auth);
            // mailSession.setDebug(true);
            Transport transport = mailSession.getTransport();

            MimeMessage message = new MimeMessage(mailSession);
            Multipart multipart = new MimeMultipart("alternative");

            BodyPart htmlPart = new MimeBodyPart();
            htmlPart.setContent(new String(messageHtml.getBytes("UTF8"), "ISO-8859-1"), "text/html");
            multipart.addBodyPart(htmlPart);

            message.setContent(multipart);
            message.setFrom(new InternetAddress(from));
            message.setSubject(subject, "UTF-8");
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

            transport.connect();
            transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
            transport.close();
        } catch (Exception e) {
            LOG.debug("Exception while sending email: ", e);
            throw e;
        }
    }

    private class SMTPAuthenticator extends javax.mail.Authenticator {
        public PasswordAuthentication getPasswordAuthentication() {
            String username = sendGridUsername;
            String password = sendGridPassword;
            return new PasswordAuthentication(username, password);
        }
    }
}