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;
  
  import org.opencms.main.CmsLog;
  import org.opencms.ui.apps.CmsAppWorkplaceUi;
  
  import java.net.SocketException;
  
  import org.apache.commons.logging.Log;
  
  import com.vaadin.server.DefaultErrorHandler;
  import com.vaadin.server.ErrorEvent;
  
  /**
   * Error handler for uncaught Vaadin exceptions.<p>
   */
  public class CmsVaadinErrorHandler extends DefaultErrorHandler {
  
      /** The logger instance for this class. */
      private static final Log LOG = CmsLog.getLog(CmsVaadinErrorHandler.class);
  
      /** Serial version id. */
      private static final long serialVersionUID = 1L;
  
      /** The workplace UI instance. */
      private CmsAppWorkplaceUi m_ui;
  
      /**
       * Constructor.<p>
       */
      public CmsVaadinErrorHandler() {}
  
      /**
       * Constructor.<p>
       *
       * @param ui the workplace UI
       */
      public CmsVaadinErrorHandler(CmsAppWorkplaceUi ui) {
          m_ui = ui;
      }
  
      /**
       * @see com.vaadin.server.DefaultErrorHandler#error(com.vaadin.server.ErrorEvent)
       */
      @Override
      public void error(ErrorEvent event) {
  
          super.error(event);
          if (m_ui != null) {
              m_ui.onError();
          }
          Throwable throwable = event.getThrowable();
          if (!(throwable instanceof SocketException)) {
              LOG.error(throwable.getLocalizedMessage(), throwable);
          }
      }
  
  }
  