//
   //  ========================================================================
   //  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.server.handler;
  
  
  import java.io.IOException;
  
  import org.eclipse.jetty.server.Handler;
  import org.eclipse.jetty.server.Server;
  import org.eclipse.jetty.util.annotation.ManagedObject;
  import org.eclipse.jetty.util.component.ContainerLifeCycle;
  import org.eclipse.jetty.util.log.Log;
  import org.eclipse.jetty.util.log.Logger;
  
  
  /* ------------------------------------------------------------ */
  /** AbstractHandler.
   */
  @ManagedObject("Jetty Handler")
  public abstract class AbstractHandler extends ContainerLifeCycle implements Handler
  {
      private static final Logger LOG = Log.getLogger(AbstractHandler.class);
  
      private Server _server;
      
      /* ------------------------------------------------------------ */
      /**
       * 
       */
      public AbstractHandler()
      {
      }
  
      /* ------------------------------------------------------------ */
      /* 
       * @see org.eclipse.thread.LifeCycle#start()
       */
      @Override
      protected void doStart() throws Exception
      {
          if (LOG.isDebugEnabled())
              LOG.debug("starting {}",this);
          if (_server==null)
              LOG.warn("No Server set for {}",this);
          super.doStart();
      }
  
      /* ------------------------------------------------------------ */
      /* 
       * @see org.eclipse.thread.LifeCycle#stop()
       */
      @Override
      protected void doStop() throws Exception
      {
          if (LOG.isDebugEnabled())
              LOG.debug("stopping {}",this);
          super.doStop();
      }
  
      /* ------------------------------------------------------------ */
      @Override
      public void setServer(Server server)
      {
          if (_server==server)
              return;
          if (isStarted())
              throw new IllegalStateException(STARTED);
          _server=server;
      }
  
      /* ------------------------------------------------------------ */
      @Override
      public Server getServer()
      {
          return _server;
      }
  
      /* ------------------------------------------------------------ */
      @Override
      public void destroy()
      {
          if (!isStopped())
              throw new IllegalStateException("!STOPPED");
         super.destroy();
     }
 
     /* ------------------------------------------------------------ */
     @Override
     public void dumpThis(Appendable out) throws IOException
     {
         out.append(toString()).append(" - ").append(getState()).append('\n');
     }
     
 }