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package org.gbif.provider

/*
 * Copyright 2011 Global Biodiversity Information Facility (GBIF)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import net.liftweb.actor.LiftActor
import net.liftweb.http.ListenerManager
import net.liftweb.db.DB
import net.liftweb.util.{Props, Schedule}
import net.liftweb.util.Helpers._

object DBUpdater extends LiftActor with ListenerManager {

  private var count = 0L

  // This is the message to send to all subscribed Listeners
  protected def createUpdate = count

  private val updateInterval = Props.getInt("raw_occurrence_record.update.interval", 10);

  private def updateRawOccurrenceRecordCount() {
    val result = DB.performQuery("SELECT COUNT(*) AS ror_count FROM raw_occurrence_record")
    count = result match {
      case (_, List(List(newCount: Long))) => newCount;
      case _ => 0;
    }
  }

  override protected def lowPriority = {
    case "updateRawOccurrenceRecordCount" =>
      updateRawOccurrenceRecordCount()
      updateListeners()
      Schedule.schedule(DBUpdater, "updateRawOccurrenceRecordCount", updateInterval seconds)
  }
}