+++ /dev/null
-/*
- * 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.log4j;
-
-import org.apache.log4j.spi.LoggerRepository;
-import org.apache.log4j.spi.LoggerFactory;
-import org.apache.log4j.spi.RepositorySelector;
-import org.apache.log4j.spi.DefaultRepositorySelector;
-import org.apache.log4j.spi.RootLogger;
-import org.apache.log4j.spi.NOPLoggerRepository;
-import org.apache.log4j.helpers.Loader;
-import org.apache.log4j.helpers.OptionConverter;
-import org.apache.log4j.helpers.LogLog;
-
-import java.net.URL;
-import java.net.MalformedURLException;
-
-
-import java.util.Enumeration;
-import java.io.StringWriter;
-import java.io.PrintWriter;
-
-/**
- * Gets {@link Logger} instances and operates on the current {@link LoggerRepository}.
- *
- * <p>
- * When the <code>LogManager</code> class is loaded into memory the default initialization procedure runs. The default initialization
- * procedure</a> is described in the <a href="../../../../manual.html#defaultInit">short log4j manual</a>.
- * </p>
- *
- * @author Ceki Gülcü
- */
-public class LogManager {
-
- /**
- * @deprecated This variable is for internal use only. It will
- * become package protected in future versions.
- * */
- static public final String DEFAULT_CONFIGURATION_FILE = "log4j.properties";
-
- static final String DEFAULT_XML_CONFIGURATION_FILE = "log4j.xml";
-
- /**
- * @deprecated This variable is for internal use only. It will
- * become private in future versions.
- * */
- static final public String DEFAULT_CONFIGURATION_KEY="log4j.configuration";
-
- /**
- * @deprecated This variable is for internal use only. It will
- * become private in future versions.
- * */
- static final public String CONFIGURATOR_CLASS_KEY="log4j.configuratorClass";
-
- /**
- * @deprecated This variable is for internal use only. It will
- * become private in future versions.
- */
- public static final String DEFAULT_INIT_OVERRIDE_KEY =
- "log4j.defaultInitOverride";
-
-
- static private Object guard = null;
- static private RepositorySelector repositorySelector;
-
- static {
- // By default we use a DefaultRepositorySelector which always returns 'h'.
- Hierarchy h = new Hierarchy(new RootLogger(Level.DEBUG));
- repositorySelector = new DefaultRepositorySelector(h);
-
- /** Search for the properties file log4j.properties in the CLASSPATH. */
- String override =OptionConverter.getSystemProperty(DEFAULT_INIT_OVERRIDE_KEY,
- null);
-
- // if there is no default init override, then get the resource
- // specified by the user or the default config file.
- if(override == null || "false".equalsIgnoreCase(override)) {
-
- String configurationOptionStr = OptionConverter.getSystemProperty(
- DEFAULT_CONFIGURATION_KEY,
- null);
-
- String configuratorClassName = OptionConverter.getSystemProperty(
- CONFIGURATOR_CLASS_KEY,
- null);
-
- URL url = null;
-
- // if the user has not specified the log4j.configuration
- // property, we search first for the file "log4j.xml" and then
- // "log4j.properties"
- if(configurationOptionStr == null) {
- url = Loader.getResource(DEFAULT_XML_CONFIGURATION_FILE);
- if(url == null) {
- url = Loader.getResource(DEFAULT_CONFIGURATION_FILE);
- }
- } else {
- try {
- url = new URL(configurationOptionStr);
- } catch (MalformedURLException ex) {
- // so, resource is not a URL:
- // attempt to get the resource from the class path
- url = Loader.getResource(configurationOptionStr);
- }
- }
-
- // If we have a non-null url, then delegate the rest of the
- // configuration to the OptionConverter.selectAndConfigure
- // method.
- if(url != null) {
- LogLog.debug("Using URL ["+url+"] for automatic log4j configuration.");
- try {
- OptionConverter.selectAndConfigure(url, configuratorClassName,
- LogManager.getLoggerRepository());
- } catch (NoClassDefFoundError e) {
- LogLog.warn("Error during default initialization", e);
- }
- } else {
- LogLog.debug("Could not find resource: ["+configurationOptionStr+"].");
- }
- } else {
- LogLog.debug("Default initialization of overridden by " +
- DEFAULT_INIT_OVERRIDE_KEY + "property.");
- }
- }
-
- /**
- Sets <code>LoggerFactory</code> but only if the correct
- <em>guard</em> is passed as parameter.
-
- <p>Initally the guard is null. If the guard is
- <code>null</code>, then invoking this method sets the logger
- factory and the guard. Following invocations will throw a {@link
- IllegalArgumentException}, unless the previously set
- <code>guard</code> is passed as the second parameter.
-
- <p>This allows a high-level component to set the {@link
- RepositorySelector} used by the <code>LogManager</code>.
-
- <p>For example, when tomcat starts it will be able to install its
- own repository selector. However, if and when Tomcat is embedded
- within JBoss, then JBoss will install its own repository selector
- and Tomcat will use the repository selector set by its container,
- JBoss. */
- static
- public
- void setRepositorySelector(RepositorySelector selector, Object guard)
- throws IllegalArgumentException {
- if((LogManager.guard != null) && (LogManager.guard != guard)) {
- throw new IllegalArgumentException(
- "Attempted to reset the LoggerFactory without possessing the guard.");
- }
-
- if(selector == null) {
- throw new IllegalArgumentException("RepositorySelector must be non-null.");
- }
-
- LogManager.guard = guard;
- LogManager.repositorySelector = selector;
- }
-
-
- /**
- * This method tests if called from a method that
- * is known to result in class members being abnormally
- * set to null but is assumed to be harmless since the
- * all classes are in the process of being unloaded.
- *
- * @param ex exception used to determine calling stack.
- * @return true if calling stack is recognized as likely safe.
- */
- private static boolean isLikelySafeScenario(final Exception ex) {
- StringWriter stringWriter = new StringWriter();
- ex.printStackTrace(new PrintWriter(stringWriter));
- String msg = stringWriter.toString();
- return msg.indexOf("org.apache.catalina.loader.WebappClassLoader.stop") != -1;
- }
-
- static
- public
- LoggerRepository getLoggerRepository() {
- if (repositorySelector == null) {
- repositorySelector = new DefaultRepositorySelector(new NOPLoggerRepository());
- guard = null;
- Exception ex = new IllegalStateException("Class invariant violation");
- String msg =
- "log4j called after unloading, see http://logging.apache.org/log4j/1.2/faq.html#unload.";
- if (isLikelySafeScenario(ex)) {
- LogLog.debug(msg, ex);
- } else {
- LogLog.error(msg, ex);
- }
- }
- return repositorySelector.getLoggerRepository();
- }
-
- /**
- Retrieve the appropriate root logger.
- */
- public
- static
- Logger getRootLogger() {
- // Delegate the actual manufacturing of the logger to the logger repository.
- return getLoggerRepository().getRootLogger();
- }
-
- /**
- Retrieve the appropriate {@link Logger} instance.
- */
- public
- static
- Logger getLogger(final String name) {
- // Delegate the actual manufacturing of the logger to the logger repository.
- return getLoggerRepository().getLogger(name);
- }
-
- /**
- Retrieve the appropriate {@link Logger} instance.
- */
- public
- static
- Logger getLogger(final Class clazz) {
- // Delegate the actual manufacturing of the logger to the logger repository.
- return getLoggerRepository().getLogger(clazz.getName());
- }
-
-
- /**
- Retrieve the appropriate {@link Logger} instance.
- */
- public
- static
- Logger getLogger(final String name, final LoggerFactory factory) {
- // Delegate the actual manufacturing of the logger to the logger repository.
- return getLoggerRepository().getLogger(name, factory);
- }
-
- public
- static
- Logger exists(final String name) {
- return getLoggerRepository().exists(name);
- }
-
- public
- static
- Enumeration getCurrentLoggers() {
- return getLoggerRepository().getCurrentLoggers();
- }
-
- public
- static
- void shutdown() {
- getLoggerRepository().shutdown();
- }
-
- public
- static
- void resetConfiguration() {
- getLoggerRepository().resetConfiguration();
- }
-}
-
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