/*
    * Copyright (C) 2005-2015 Schlichtherle IT Services.
    * All rights reserved. Use is subject to license terms.
    */
   package net.java.truecommons.jmx.sl;
   
   import javax.annotation.concurrent.Immutable;
   import javax.management.MBeanServer;
   import net.java.truecommons.jmx.spi.MBeanServerDecorator;
  import net.java.truecommons.jmx.spi.MBeanServerProvider;
  import net.java.truecommons.services.Container;
  import net.java.truecommons.services.ServiceLocator;
  
  /**
   * A container of the singleton MBean server.
   * The MBean server is created by using a {@link ServiceLocator} to search for
   * advertised implementations of the factory service specification class
   * {@link MBeanServerProvider}
   * and the decorator service specification class
   * {@link MBeanServerDecorator}.
   *
   * @since  TrueCommons 2.3
   * @author Christian Schlichtherle
   */
  @Immutable
  public final class MBeanServerLocator implements Container<MBeanServer> {
  
      /** The singleton instance of this class. */
      public static final MBeanServerLocator SINGLETON = new MBeanServerLocator();
  
      private MBeanServerLocator() { }
  
      @Override
      public MBeanServer get() { return Lazy.mbs; }
  
      /** A static data utility class used for lazy initialization. */
      private static final class Lazy {
          static final MBeanServer mbs
                  = new ServiceLocator(MBeanServerLocator.class)
                  .container(MBeanServerProvider.class, MBeanServerDecorator.class)
                  .get();
      }
  }