| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.logging.log4j.web; |
| |
| import java.util.Locale; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.ServletContextEvent; |
| import javax.servlet.ServletContextListener; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.core.LifeCycle2; |
| import org.apache.logging.log4j.status.StatusLogger; |
| import org.apache.logging.log4j.util.Strings; |
| |
| /** |
| * In environments older than Servlet 3.0, this initializer is responsible for starting up Log4j logging before anything |
| * else happens in application initialization. In all environments, this shuts down Log4j after the application shuts |
| * down. |
| */ |
| public class Log4jServletContextListener implements ServletContextListener { |
| |
| private static final int DEFAULT_STOP_TIMEOUT = 30; |
| private static final TimeUnit DEFAULT_STOP_TIMEOUT_TIMEUNIT = TimeUnit.SECONDS; |
| |
| private static final String KEY_STOP_TIMEOUT = "log4j.stop.timeout"; |
| private static final String KEY_STOP_TIMEOUT_TIMEUNIT = "log4j.stop.timeout.timeunit"; |
| |
| private static final Logger LOGGER = StatusLogger.getLogger(); |
| |
| private ServletContext servletContext; |
| private Log4jWebLifeCycle initializer; |
| |
| @Override |
| public void contextInitialized(final ServletContextEvent event) { |
| this.servletContext = event.getServletContext(); |
| LOGGER.debug("Log4jServletContextListener ensuring that Log4j starts up properly."); |
| |
| if ("true".equalsIgnoreCase(servletContext.getInitParameter( |
| Log4jWebSupport.IS_LOG4J_AUTO_SHUTDOWN_DISABLED))) { |
| throw new IllegalStateException("Do not use " + getClass().getSimpleName() + " when " |
| + Log4jWebSupport.IS_LOG4J_AUTO_SHUTDOWN_DISABLED + " is true. Please use " |
| + Log4jShutdownOnContextDestroyedListener.class.getSimpleName() + " instead of " |
| + getClass().getSimpleName() + "."); |
| } |
| |
| this.initializer = WebLoggerContextUtils.getWebLifeCycle(this.servletContext); |
| try { |
| this.initializer.start(); |
| this.initializer.setLoggerContext(); // the application is just now starting to start up |
| } catch (final IllegalStateException e) { |
| throw new IllegalStateException("Failed to initialize Log4j properly.", e); |
| } |
| } |
| |
| @Override |
| public void contextDestroyed(final ServletContextEvent event) { |
| if (this.servletContext == null || this.initializer == null) { |
| LOGGER.warn("Context destroyed before it was initialized."); |
| return; |
| } |
| LOGGER.debug("Log4jServletContextListener ensuring that Log4j shuts down properly."); |
| |
| this.initializer.clearLoggerContext(); // the application is finished |
| // shutting down now |
| if (initializer instanceof LifeCycle2) { |
| final String stopTimeoutStr = servletContext.getInitParameter(KEY_STOP_TIMEOUT); |
| final long stopTimeout = Strings.isEmpty(stopTimeoutStr) ? DEFAULT_STOP_TIMEOUT |
| : Long.parseLong(stopTimeoutStr); |
| final String timeoutTimeUnitStr = servletContext.getInitParameter(KEY_STOP_TIMEOUT_TIMEUNIT); |
| final TimeUnit timeoutTimeUnit = Strings.isEmpty(timeoutTimeUnitStr) ? DEFAULT_STOP_TIMEOUT_TIMEUNIT |
| : TimeUnit.valueOf(timeoutTimeUnitStr.toUpperCase(Locale.ROOT)); |
| ((LifeCycle2) this.initializer).stop(stopTimeout, timeoutTimeUnit); |
| } else { |
| this.initializer.stop(); |
| } |
| } |
| } |