atom.app.service.JavaMailService.scala Maven / Gradle / Ivy

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package atom.app.service

import java.lang.Boolean
import java.util.Properties
import javax.mail.Message.RecipientType.TO
import javax.mail._
import javax.mail.internet.{InternetAddress, MimeBodyPart, MimeMessage, MimeMultipart}

import atom.app.config
import atom.app.service.JavaMailService.{charset, from, getMailSession, ping}

import scala.collection.JavaConversions.asScalaSet

/**
 * Реализаци сервиса отправки электронных писем на основе JavaMail API.
 * 
 * Настройка сервиса осушествляется посредствам значениями соответствующими
 * официальной докумментации JavaMail API:
 * https://javamail.java.net/nonav/docs/api/
 * 
 * ЗАМЕТКА: Исключение состовляет ключ `mail.smtp.auth`, для его указание
 * используется ключ `mail.smtp.auth.enable`.
 *
 * @author Alex Voloshyn
 * @version 1.0 2/22/15
 * @see EmailService
 */
class JavaMailService extends EmailService {
  /**
   * Инициализация подключения к почтовому серверу.
   */
  private val session = getMailSession

  @throws[MessagingException]
  override def send(subject: String, message: String, to: String): Unit = {
    val msg = new MimeMessage(session)
    msg.addRecipient(TO, new InternetAddress(to))
    msg.setSubject(subject)
    val multipart = new MimeMultipart
    val htmlPart = new MimeBodyPart
    htmlPart.setContent(message, charset)
    multipart.addBodyPart(htmlPart)
    msg.setContent(multipart)
    Transport.send(msg)
  }

  override def isAlive: Boolean = {
    try {
      send(ping, ping, from)
      true
    } catch {
      case t: MessagingException => false
    }
  }
}

object JavaMailService {
  /**
   * Кодировка электронного сообщения.
   */
  private val charset = config.getString("mail.content.type")
  /**
   * Электронный адрес отправителя сообщения.
   */
  private val from = config.getString("mail.smtp.from")
  /**
   * Константа для тестового письма для проверки доступности сервиса отправки
   * электронных писем.
   */
  private val ping = "Ping"
  /**
   * Конфигурация подключения JavaMail API к почтовому серверу.
   */
  private val props = new Properties
  config.getConfig("mail").entrySet() foreach { entry => props.put(
    "mail." + entry.getKey, entry.getValue.render().replaceAll("\"", ""))
  }
  props.put("mail.smtp.auth",
    config.getValue("mail.smtp.auth.enable").render().replaceAll("\"", ""))

  /**
   * Получение подключение к почтовому серверу.
   *
   * @return подключенную сессию к почтовому серверу
   */
  private def getMailSession: Session = {
    if (config.getBoolean("mail.smtp.auth.enable")) {
      Session.getInstance(props, new MailAuthenticator)
    } else {
      Session.getInstance(props)
    }
  }

  /**
   * Реализация авторизатора для подключения к почтовому серверу по логину и
   * паролю.
   */
  private class MailAuthenticator extends Authenticator {
    protected override def getPasswordAuthentication: PasswordAuthentication = {
      new PasswordAuthentication(
        config.getString("mail.smtp.auth.user"),
        config.getString("mail.smtp.auth.password"))
    }
  }

}