Java tutorial
/* * This library is part of OpenCms - * the Open Source Content Management System * * Copyright (c) Alkacon Software GmbH & Co. KG (http://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: http://www.alkacon.com * * For further information about OpenCms, please see the * project website: http://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.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.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."); } CmsAppWorkplaceUi.get().checkBroadcasts(); } }