content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library 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 library 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.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.ui.components.extensions;
  
  import org.opencms.main.CmsLog;
  import org.opencms.main.CmsUIServlet;
  import org.opencms.ui.A_CmsUI;
  import org.opencms.ui.apps.CmsAppWorkplaceUi;
  import org.opencms.ui.shared.rpc.I_CmsPollServerRpc;
  
  import org.apache.commons.logging.Log;
  
  import com.vaadin.server.AbstractExtension;
  import com.vaadin.server.VaadinServlet;
  import com.vaadin.ui.AbstractComponent;
  
  /**
   * Allows the use of max height in combination with vaadin layout components.<p>
   */
  public class CmsPollServerExtension extends AbstractExtension implements I_CmsPollServerRpc {
  
      /** Logger instance for this class. */
      private static final Log LOG = CmsLog.getLog(CmsPollServerExtension.class);
  
      /** The serial version id. */
      private static final long serialVersionUID = 3978957151754705873L;
  
      /**
       * Constructor.<p>
       *
       * @param component the component to extend
       */
      public CmsPollServerExtension(AbstractComponent component) {
  
          extend(component);
          registerRpc(this);
      }
  
      /**
       * @see org.opencms.ui.shared.rpc.I_CmsPollServerRpc#poll()
       */
      public void poll() {
  
          if (LOG.isDebugEnabled()) {
              LOG.debug("Client poll recieved.");
          }
  
          ((CmsUIServlet)VaadinServlet.getCurrent()).setBroadcastPoll();
          A_CmsUI ui = A_CmsUI.get();
          if (ui instanceof CmsAppWorkplaceUi) {
              ((CmsAppWorkplaceUi)ui).checkBroadcasts();
          }
      }
  }
  