atom.notification.JcrNotificationManager.scala Maven / Gradle / Ivy

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package atom.notification

import java.util.{Calendar, GregorianCalendar}
import javax.jcr.Node
import javax.jcr.observation.Event.{NODE_ADDED, NODE_REMOVED, PROPERTY_CHANGED}
import javax.jcr.observation.{EventIterator, EventListener}
import javax.jcr.query.Query.JCR_SQL2

import atom.app.Notification.Email
import atom.app.{Notification, NotificationListener, NotificationManager}
import atom.content.Jcr
import atom.notification.query.{FOR_USER, FOR_USER_AND_REF, FOR_USER_AND_SOURCE}

import scala.collection.JavaConversions.asScalaIterator

/**
 * Релизания менеджера для работы с уведомлениями на основе хранилища JCR.
 *
 * @author Alex Voloshyn
 * @version 1.0 2/22/15
 * @see NotificationManager
 */
class JcrNotificationManager extends NotificationManager with Jcr {
  override val workspace = WS_NOTIFICATIONS

  override def notify(event: Notification): Unit = {
    execute(session => {
      val notificationFolder = session getNode PATH_NOTIFICATION
      val userFolder = getOrCreate(notificationFolder, event.user, NT_USER)
      val referenceFolder = getOrCreate(userFolder, event.ref, NT_REF)
      val node = referenceFolder.addNode(event.source, NT_NOTIFICATION)
      node setProperty(PROP_SOURCE, event.source)
      node setProperty(PROP_TITLE, event.title)
      node setProperty(PROP_TEXT, event.text)
      node setProperty(PROP_SENDER, event.sender)
      node setProperty(PROP_EXP, GregorianCalendar.from(event.expiration))
      event.channels foreach {
        case email: Email =>
          node.addNode(NT_EMAIL, NT_EMAIL).setProperty(PROP_TO, email.to)
      }
      session.save()
    })
  }

  override def count(user: String): Long = {
    queryCount(FOR_USER format user)
  }

  override def countFromApp(user: String, app: String): Long = {
    queryCount(FOR_USER_AND_REF format(user, app))
  }

  override def countFromSource(user: String, source: String): Long = {
    queryCount(FOR_USER_AND_SOURCE format(user, source))
  }

  override def read(user: String, source: String): Unit = {
    execute(session => {
      val query = session.getWorkspace.getQueryManager.createQuery(
        FOR_USER_AND_SOURCE format(user, source), JCR_SQL2)
      query.execute.getNodes foreach (node =>
        node.asInstanceOf[Node].setProperty(PROP_SEEN, Calendar.getInstance()))
      session.save()
    })
  }

  /**
   * Объявления сокращенного названия типа слушателя изменений в уведомлениях.
   */
  type Listener = NotificationListener
  /**
   * Объявления сокращенного названия типа обработчика изменений в уведомлениях.
   */
  type Handler = NotificationListener.Handler

  override def watch(user: String, listener: Listener): Handler = {
    register(PATH_NOTIFICATION_USER format user, listener)
  }

  override def watch(user: String, app: String, listener: Listener): Handler = {
    register(PATH_NOTIFICATION_USER_APP format(user, app), listener)
  }

  /**
   * Регистрачия слушателя изменений в хранилище по укзанному пути.
   *
   * @param path путь для отслеживания изменений
   * @param listener слушатеть изменений
   * @return обработчик изменений в хранилище
   */
  private def register(path: String, listener: Listener): Handler = {
    observe[Handler](session => {
      val manager = session.getWorkspace.getObservationManager
      val handler = new EventListener {
        override def onEvent(events: EventIterator): Unit = listener.onEvent()
      }
      manager addEventListener(handler,
        NODE_ADDED | NODE_REMOVED | PROPERTY_CHANGED,
        path, true, null, null, false)
      new Handler {
        override def destroy(): Unit = manager removeEventListener handler
      }
    }).getOrElse(EMPTY_HANDLER)
  }
}