com.seer.datacruncher.utils.mail.MailService.java Source code

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Here is the source code for com.seer.datacruncher.utils.mail.MailService.java

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/*
 * Copyright (c) 2015  www.see-r.com
 * All rights reserved
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.seer.datacruncher.utils.mail;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.AuthenticationFailedException;
import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MailService {
    private Logger log = Logger.getLogger(this.getClass());
    private JavaMailSender mailSender;

    public void sendMail(MailConfig mailConfig) throws Exception {
        String logMsg = "MailService:sendMail():";
        InputStream attachment = null;
        MimeMessage mimeMessage = null;
        MimeMessageHelper helper = null;
        try {
            mimeMessage = mailSender.createMimeMessage();
            helper = new MimeMessageHelper(mimeMessage, true);
            helper.setText(mailConfig.getText(), true);
            if (StringUtils.isEmpty(mailConfig.getMailTo())) {
                log.error("Invalid or empty 'toAddress' configured!!");
                throw new Exception("Invalid or empty 'toAddress' configured");
            }
            if (StringUtils.isEmpty(mailConfig.getMailFrom())) {
                log.error("Invalid or empty 'FromAddress' configured!!");
                throw new Exception("Invalid or empty 'FromAddress' configured");
            }
            if (!isEmailValid(mailConfig.getMailFrom())) {
                log.error("Invalid 'FromAddress' configured!!");
                throw new Exception("Invalid 'FromAddress' configured");
            }
            helper.setFrom(new InternetAddress(mailConfig.getMailFrom()));
            helper.setSubject(mailConfig.getSubject());
            helper.setTo(getToAddress(mailConfig.getMailTo()));
            attachment = mailConfig.getAttachment();
            if (attachment != null) {
                StreamAttachmentDataSource datasource = new StreamAttachmentDataSource(mailConfig.getAttachment());
                helper.addAttachment(mailConfig.getAttachmentName(), datasource);
            }
            this.mailSender.send(mimeMessage);

        } catch (AuthenticationFailedException afex) {
            log.error(logMsg + "AuthenticationFailedException:", afex);
            throw new Exception("AuthenticationFailedException", afex);
        } catch (MessagingException mex) {
            log.error(logMsg + "Exception:", mex);
            throw new Exception("MessagingException", mex);
        } catch (Exception ex) {
            log.error(logMsg + "Exception:", ex);
            throw ex;
        }
    }

    //----------------------HELPERS------------------
    private InternetAddress[] getToAddress(String mailToAddress) {
        try {
            List<InternetAddress> toAddress = new ArrayList<InternetAddress>();
            StringBuilder failedMailAddress = new StringBuilder();
            String[] addressList = mailToAddress.split(",");
            InternetAddress interAddr = null;
            for (String mailTo : addressList) {
                if (isEmailValid(mailTo)) {
                    interAddr = new InternetAddress(mailTo);
                    toAddress.add(interAddr);
                } else {
                    if (failedMailAddress.toString().length() > 0) {
                        failedMailAddress.append(",");
                    }
                    failedMailAddress.append(mailTo);
                }
            }
            InternetAddress[] finalToAddressList = new InternetAddress[toAddress.size()];
            if (toAddress != null && toAddress.size() > 0) {
                return toAddress.toArray(finalToAddressList);
            } else {
                if (StringUtils.isEmpty(failedMailAddress.toString())) {
                    log.error("Unable to send the mail to [ " + failedMailAddress.toString() + "]");
                }
                throw new Exception("No valid toAddress configured");
            }
        } catch (Exception e) {
            log.error(e);
        }
        return null;
    }

    private boolean isEmailValid(String email) {
        Pattern pattern = Pattern.compile(
                "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@([A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(\\.[_A-Za-z0-9-]+)|\\[([0-9])++(.[0-9])++\\])");
        Matcher matcher = pattern.matcher(email);
        return (matcher.matches());
    }

    public JavaMailSender getMailSender() {
        return mailSender;
    }

    public void setMailSender(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }

}