/*
    * Copyright (C) 2010 eXo Platform SAS.
    *
    * This is free software; you can redistribute it and/or modify it
    * under the terms of the GNU Lesser General Public License as
    * published by the Free Software Foundation; either version 2.1 of
    * the License, or (at your option) any later version.
    *
    * This software 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. See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this software; if not, write to the Free
   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
   */
  
  package org.exoplatform.services.portletcache;
  
  import org.exoplatform.commons.cache.future.Loader;
  import org.exoplatform.services.log.Log;
  
  /**
   * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
   * @version $Revision$
   */
  class PortletRenderer implements Loader<WindowKey, MarkupFragment, PortletRenderContext>
  {
  
    /** . */
    private final Log log;
  
    PortletRenderer(Log log)
    {
      this.log = log;
    }
  
    public MarkupFragment retrieve(PortletRenderContext context, WindowKey key) throws Exception
    {
      BufferedRenderResponse bufferedResp = new BufferedRenderResponse(context.resp);
      context.chain.doFilter(context.req, bufferedResp);
  
      //
      long now = System.currentTimeMillis();
  
      //
      String expirationCache = bufferedResp.getExpirationCache();
      long expirationCacheMillis = now;
      if (expirationCache != null)
      {
        try
        {
          int expirationCacheSec = Integer.parseInt(expirationCache);
          if (expirationCacheSec == -1)
          {
            expirationCacheMillis = Long.MAX_VALUE;
          }
          else if (expirationCacheSec > 0)
          {
            expirationCacheMillis += 1000 * expirationCacheSec;
          }
        }
        catch (NumberFormatException e)
        {
          if (log.isWarnEnabled()) {
            log.warn("Incorrect expiration cache value " + expirationCache);
          }
        }
      }
  
      //
      return new MarkupFragment(expirationCacheMillis, bufferedResp.getBytes());
    }
  }