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OpenCms is an enterprise-ready, easy to use website content management system based on Java and XML technology. Offering a complete set of features, OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

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/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) Alkacon Software GmbH (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.gwt.client.rpc;

import org.opencms.gwt.client.CmsCoreProvider;
import org.opencms.gwt.shared.rpc.I_CmsLogService;
import org.opencms.gwt.shared.rpc.I_CmsLogServiceAsync;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.rpc.ServiceDefTarget;

/**
 * Handles client side logging.

* * @since 8.0.0 * * @see org.opencms.gwt.CmsLogService * @see org.opencms.gwt.shared.rpc.I_CmsLogService * @see org.opencms.gwt.shared.rpc.I_CmsLogServiceAsync */ public final class CmsLog { /** The service instance. */ private static I_CmsLogServiceAsync m_loggingService; /** * Prevent instantiation.

*/ private CmsLog() { // Prevent instantiation } /** * Logs client messages on the server.

* * @param message the message to log * * @return the generated ticket */ public static String log(final String message) { final String ticket = String.valueOf(System.currentTimeMillis()); // using a deferred command just to be more responsible // since we do not expect any feed back from it Scheduler.get().scheduleDeferred(new ScheduledCommand() { /** * @see com.google.gwt.user.client.Command#execute() */ public void execute() { getLoggingService().log(ticket, message, new AsyncCallback() { /** * @see com.google.gwt.user.client.rpc.AsyncCallback#onFailure(java.lang.Throwable) */ public void onFailure(Throwable caught) { // logging failed, really bad // but the only thing we can do is to ignore it } /** * @see com.google.gwt.user.client.rpc.AsyncCallback#onSuccess(Object) */ public void onSuccess(Void result) { // logged successfully } }); } }); return ticket; } /** * Returns the service instance, using lazy initialization.

* * @return the service instance */ protected static I_CmsLogServiceAsync getLoggingService() { if (m_loggingService == null) { m_loggingService = GWT.create(I_CmsLogService.class); String serviceUrl = CmsCoreProvider.get().link("org.opencms.gwt.CmsLogService.gwt"); ((ServiceDefTarget)m_loggingService).setServiceEntryPoint(serviceUrl); } return m_loggingService; } }





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