001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.ui;
029
030import org.opencms.main.CmsLog;
031import org.opencms.ui.apps.CmsAppWorkplaceUi;
032
033import java.net.SocketException;
034
035import org.apache.commons.logging.Log;
036
037import com.vaadin.server.DefaultErrorHandler;
038import com.vaadin.server.ErrorEvent;
039
040/**
041 * Error handler for uncaught Vaadin exceptions.<p>
042 */
043public class CmsVaadinErrorHandler extends DefaultErrorHandler {
044
045    /** The logger instance for this class. */
046    private static final Log LOG = CmsLog.getLog(CmsVaadinErrorHandler.class);
047
048    /** Serial version id. */
049    private static final long serialVersionUID = 1L;
050
051    /** The workplace UI instance. */
052    private CmsAppWorkplaceUi m_ui;
053
054    /**
055     * Constructor.<p>
056     */
057    public CmsVaadinErrorHandler() {}
058
059    /**
060     * Constructor.<p>
061     *
062     * @param ui the workplace UI
063     */
064    public CmsVaadinErrorHandler(CmsAppWorkplaceUi ui) {
065        m_ui = ui;
066    }
067
068    /**
069     * @see com.vaadin.server.DefaultErrorHandler#error(com.vaadin.server.ErrorEvent)
070     */
071    @Override
072    public void error(ErrorEvent event) {
073
074        super.error(event);
075        if (m_ui != null) {
076            m_ui.onError();
077        }
078        Throwable throwable = event.getThrowable();
079        if (!(throwable instanceof SocketException)) {
080            LOG.error(throwable.getLocalizedMessage(), throwable);
081        }
082    }
083
084}