/*
    * Copyright (C) 2013 4th Line GmbH, Switzerland
    *
    * The contents of this file are subject to the terms of either the GNU
    * Lesser General Public License Version 2 or later ("LGPL") or the
    * Common Development and Distribution License Version 1 or later
    * ("CDDL") (collectively, the "License"). You may not use this file
    * except in compliance with the License. See LICENSE.txt for more
    * information.
   *
   * 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.
   */
  
  package org.fourthline.cling.registry;
  
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  /**
   * Runs periodically and calls {@link org.fourthline.cling.registry.RegistryImpl#maintain()}.
   *
   * @author Christian Bauer
   */
  public class RegistryMaintainer implements Runnable {
  
      private static Logger log = Logger.getLogger(RegistryMaintainer.class.getName());
  
      final private RegistryImpl registry;
      final private int sleepIntervalMillis;
  
      private volatile boolean stopped = false;
  
      public RegistryMaintainer(RegistryImpl registry, int sleepIntervalMillis) {
          this.registry = registry;
          this.sleepIntervalMillis = sleepIntervalMillis;
      }
  
      public void stop() {
          if (log.isLoggable(Level.FINE))
              log.fine("Setting stopped status on thread");
          stopped = true;
      }
  
      public void run() {
          stopped = false;
          if (log.isLoggable(Level.FINE))
              log.fine("Running registry maintenance loop every milliseconds: " + sleepIntervalMillis);
          while (!stopped) {
  
              try {
                  registry.maintain();
                  Thread.sleep(sleepIntervalMillis);
              } catch (InterruptedException ex) {
                  stopped = true;
              }
  
          }
          log.fine("Stopped status on thread received, ending maintenance loop");
      }
  
  }