* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0 *
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),
* University of Zurich, Switzerland.
*
*/
package org.olat.core.servlets;
import javax.servlet.http.HttpServlet;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Level;
import org.apache.log4j.PatternLayout;
import org.olat.core.logging.OLog;
import org.olat.core.logging.Tracing;
import org.springframework.core.io.ClassPathResource;
/**
* Description:
* special servlet for log4j initialization
* This servlet gets only called if the log4j system is not yet configured by
* either finding a log4j.xml file on the root of the classpath or by setting your custom
* file with -Dlog4j.configuration="file:/tmp/mylog4j.xml"
*
*
* Initial Date: 20.01.2011
* @author guido
*/
public class Log4JInitServlet extends HttpServlet {
private static final long serialVersionUID = -1969924962369679573L;
@Override
public void init() {
String file = getInitParameter("log4j-init-file");
ClassPathResource res = new ClassPathResource(file);
if (!res.exists()) {
//creating basic log4j configuration which writes to console out, Only called when not yet configured
ConsoleAppender appender = new ConsoleAppender(
new PatternLayout("%d{ABSOLUTE} %5p %c{1}:%L - %m%n"), ConsoleAppender.SYSTEM_OUT);
appender.setThreshold(Level.INFO);
BasicConfigurator.configure(appender);
OLog log = Tracing.createLoggerFor(getClass());
log.info("*****************************************************************************************");
log.info("You don't provide a log4j config file for your OLAT instance. OLAT will just log to standard out (e.g. catalina.out)." +
" Please provide a proper log config file (log4j.xml, see olat/conf for an example or read the installation guide) " +
"and place it into the root of the classpath e.g. tomcat/lib or WEB-INF/classes");
log.info("*****************************************************************************************");
}
}
}