Mail in Java

package gpro.common.New;

import gpro.common.base.GProInterface;

import java.io.File;
import java.io.FileWriter;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicInteger;

import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.sun.mail.smtp.SMTPMessage;

public class MailUtil extends GProInterface implements Runnable {

    private Properties                    properties;
    private String                        subject;
    private StringBuilder                body;
    private String                        from;
    private String                        to;
    private String                        cc;
    private String                        pathName;
    private StringBuilder                fileText;
    private static final String            fileSuffix    = ".csv";
    private boolean                        logDontMail;
    private static final AtomicInteger    ai            = new AtomicInteger();

    private final Logger                logger        = LoggerFactory.getLogger(getClass());

    public MailUtil(String subject, StringBuilder body, StringBuilder fileText) {
        init(subject, body);
        this.fileText = fileText;
    }

    public MailUtil(String subject, StringBuilder body) {
        init(subject, body);
    }

    private void init(String arg0, StringBuilder arg1) {
        properties = getConnectionProps() == null ? new Properties() : getConnectionProps();
        subject = arg0 == null ? "NO_SUBJECT" : arg0;
        body = arg1 == null ? new StringBuilder("NO_BODY") : arg1;
        to = properties.getProperty("Email.toList", "mbrigant@g-trade.com");
        cc = properties.getProperty("Email.ccList", "mbrigant@g-trade.com");
        from = properties.getProperty("Email.from", "CGMAutoEmailer@g-trade.com");
        properties.put("mail.smtp.host", getConnectionProps().getProperty("Email.server", "160.254.138.72"));
        if ("true".equalsIgnoreCase(getConnectionProps().getProperty("Email.writeToLog"))) {
            logDontMail = true;
        }
        pathName = properties.getProperty("Email.filePath", ".\\out\\");
    }

    public void run() {
        try {
            sendMail();
        } catch (Exception ex) {
            logger.warn(EXCEPTION_MESSAGE, ex);
        }
    }

    public void sendMail() throws Exception {
        Session session = Session.getInstance(properties);
        SMTPMessage msg = new SMTPMessage(session);
        msg.setFrom(new InternetAddress(from));
        msg.setRecipients(SMTPMessage.RecipientType.TO, to);
        if (cc != null)
            msg.setRecipients(SMTPMessage.RecipientType.CC, cc);
        msg.setSubject(subject);
        msg.setSentDate(new Date());
        msg.setText(body.toString());
        File fp = null;
        if (fileText != null && pathName != null) {
            fp = new File(pathName + ai.getAndIncrement() + fileSuffix);
            FileWriter fw = new FileWriter(fp, true);
            fw.write(fileText.toString());
            fw.close();
            MimeMultipart mp = new MimeMultipart();
            MimeBodyPart mbp = new MimeBodyPart();
            mbp.setText(body.toString());
            mp.addBodyPart(mbp, 0);
            mbp = new MimeBodyPart();
            mbp.attachFile(fp);
            mp.addBodyPart(mbp, 1);
            msg.setContent(mp);
        }
        if (logDontMail) {
            write2Log(msg);
        } else {
            Transport.send(msg);
        }
        if (fp != null) {
            fp.delete();
        }
    }

    private void write2Log(SMTPMessage smtpMessage) {
        try {
            String rn = "\r\n";
            StringBuilder sb = new StringBuilder();
            Address adressTo[] = smtpMessage.getRecipients(Message.RecipientType.TO);
            List to = Arrays.asList(adressTo);
            sb.append(rn + "To      :" + to);
            if (cc != null) {
                Address adressCC[] = smtpMessage.getRecipients(Message.RecipientType.CC);
                List cc = Arrays.asList(adressCC);
                sb.append(rn + "CC      :" + cc);
            }
            Date date = smtpMessage.getSentDate();
            sb.append(rn + "Date    : " + date);
            String sub = smtpMessage.getSubject();
            sb.append(rn + "Subject : " + sub);
            Object bd = smtpMessage.getContent();
            smtpMessage.getDataHandler().getInputStream();
            sb.append(rn + "Content : " + smtpMessage.getContent());
            logger.info(sb.toString());
        } catch (Exception e) {
            logger.warn(EXCEPTION_MESSAGE, e);
        }
    }
}