Source Code for Apache Log4j 1.2 Bridge
Apache Log4j 1.2 Bridge
allows applications coded to use Log4j 1.2 API to use Log4j 2 instead.
Bytecode (Java 8) for Apache Log4j 1.2 Bridge is provided in a separate JAR file like log4j-1.2-api-2.14.1.jar.
Source Code files for Apache Log4j 1.2 Bridge are provided in both binary packge like apache-log4j-2.14.1-bin.zip and source package like apache-log4j-2.14.1-src.zip. You can download them at Apache Log4j Website.
You can also browse Source Code files for Apache Log4j 1.2 Bridge 2.14.1 below.
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⏎ org/apache/log4j/xml/XmlConfiguration.java
/*
* 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.xml;
import org.apache.log4j.Appender;
import org.apache.log4j.Layout;
import org.apache.log4j.Level;
import org.apache.log4j.bridge.AppenderAdapter;
import org.apache.log4j.bridge.AppenderWrapper;
import org.apache.log4j.config.Log4j1Configuration;
import org.apache.log4j.config.PropertiesConfiguration;
import org.apache.log4j.config.PropertiesConfigurationFactory;
import org.apache.log4j.config.PropertySetter;
import org.apache.log4j.helpers.OptionConverter;
import org.apache.log4j.rewrite.RewritePolicy;
import org.apache.log4j.spi.AppenderAttachable;
import org.apache.log4j.spi.ErrorHandler;
import org.apache.log4j.spi.Filter;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.ConfigurationSource;
import org.apache.logging.log4j.core.config.LoggerConfig;
import org.apache.logging.log4j.core.config.status.StatusConfiguration;
import org.apache.logging.log4j.status.StatusLogger;
import org.apache.logging.log4j.util.LoaderUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.function.Consumer;
/**
* Class Description goes here.
*/
public class XmlConfiguration extends Log4j1Configuration {
private static final org.apache.logging.log4j.Logger LOGGER = StatusLogger.getLogger();
private static final String CONFIGURATION_TAG = "log4j:configuration";
private static final String OLD_CONFIGURATION_TAG = "configuration";
private static final String RENDERER_TAG = "renderer";
private static final String APPENDER_TAG = "appender";
public static final String PARAM_TAG = "param";
public static final String LAYOUT_TAG = "layout";
private static final String CATEGORY = "category";
private static final String LOGGER_ELEMENT = "logger";
private static final String CATEGORY_FACTORY_TAG = "categoryFactory";
private static final String LOGGER_FACTORY_TAG = "loggerFactory";
public static final String NAME_ATTR = "name";
private static final String CLASS_ATTR = "class";
public static final String VALUE_ATTR = "value";
private static final String ROOT_TAG = "root";
private static final String LEVEL_TAG = "level";
private static final String PRIORITY_TAG = "priority";
public static final String FILTER_TAG = "filter";
private static final String ERROR_HANDLER_TAG = "errorHandler";
public static final String REF_ATTR = "ref";
private static final String ADDITIVITY_ATTR = "additivity";
private static final String CONFIG_DEBUG_ATTR = "configDebug";
private static final String INTERNAL_DEBUG_ATTR = "debug";
private static final String EMPTY_STR = "";
private static final Class<?>[] ONE_STRING_PARAM = new Class[] { String.class };
private static final String dbfKey = "javax.xml.parsers.DocumentBuilderFactory";
private static final String THROWABLE_RENDERER_TAG = "throwableRenderer";
public static final long DEFAULT_DELAY = 60000;
/**
* File name prefix for test configurations.
*/
protected static final String TEST_PREFIX = "log4j-test";
/**
* File name prefix for standard configurations.
*/
protected static final String DEFAULT_PREFIX = "log4j";
// key: appenderName, value: appender
private Map<String, Appender> appenderMap;
private Properties props = null;
public XmlConfiguration(final LoggerContext loggerContext, final ConfigurationSource source,
int monitorIntervalSeconds) {
super(loggerContext, source, monitorIntervalSeconds);
appenderMap = new HashMap<>();
}
public void addAppenderIfAbsent(Appender appender) {
appenderMap.putIfAbsent(appender.getName(), appender);
}
/**
* Configures log4j by reading in a log4j.dtd compliant XML
* configuration file.
*/
@Override
public void doConfigure() throws FactoryConfigurationError {
ConfigurationSource source = getConfigurationSource();
ParseAction action = new ParseAction() {
@Override
public Document parse(final DocumentBuilder parser) throws SAXException, IOException {
@SuppressWarnings("resource") // The ConfigurationSource and its caller manages the InputStream.
InputSource inputSource = new InputSource(source.getInputStream());
inputSource.setSystemId("dummy://log4j.dtd");
return parser.parse(inputSource);
}
@Override
public String toString() {
return getConfigurationSource().getLocation();
}
};
doConfigure(action);
}
private void doConfigure(final ParseAction action) throws FactoryConfigurationError {
DocumentBuilderFactory dbf;
try {
LOGGER.debug("System property is : {}", OptionConverter.getSystemProperty(dbfKey, null));
dbf = DocumentBuilderFactory.newInstance();
LOGGER.debug("Standard DocumentBuilderFactory search succeded.");
LOGGER.debug("DocumentBuilderFactory is: " + dbf.getClass().getName());
} catch (FactoryConfigurationError fce) {
Exception e = fce.getException();
LOGGER.debug("Could not instantiate a DocumentBuilderFactory.", e);
throw fce;
}
try {
dbf.setValidating(true);
DocumentBuilder docBuilder = dbf.newDocumentBuilder();
docBuilder.setErrorHandler(new SAXErrorHandler());
docBuilder.setEntityResolver(new Log4jEntityResolver());
Document doc = action.parse(docBuilder);
parse(doc.getDocumentElement());
} catch (Exception e) {
if (e instanceof InterruptedException || e instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
// I know this is miserable...
LOGGER.error("Could not parse " + action.toString() + ".", e);
}
}
@Override
public Configuration reconfigure() {
try {
final ConfigurationSource source = getConfigurationSource().resetInputStream();
if (source == null) {
return null;
}
final XmlConfigurationFactory factory = new XmlConfigurationFactory();
final XmlConfiguration config =
(XmlConfiguration) factory.getConfiguration(getLoggerContext(), source);
return config == null || config.getState() != State.INITIALIZING ? null : config;
} catch (final IOException ex) {
LOGGER.error("Cannot locate file {}: {}", getConfigurationSource(), ex);
}
return null;
}
/**
* Delegates unrecognized content to created instance if it supports UnrecognizedElementParser.
*
* @param instance instance, may be null.
* @param element element, may not be null.
* @param props properties
* @throws IOException thrown if configuration of owner object should be abandoned.
*/
private void parseUnrecognizedElement(final Object instance, final Element element,
final Properties props) throws Exception {
boolean recognized = false;
if (instance instanceof UnrecognizedElementHandler) {
recognized = ((UnrecognizedElementHandler) instance).parseUnrecognizedElement(
element, props);
}
if (!recognized) {
LOGGER.warn("Unrecognized element {}", element.getNodeName());
}
}
/**
* Delegates unrecognized content to created instance if
* it supports UnrecognizedElementParser and catches and
* logs any exception.
*
* @param instance instance, may be null.
* @param element element, may not be null.
* @param props properties
* @since 1.2.15
*/
private void quietParseUnrecognizedElement(final Object instance,
final Element element,
final Properties props) {
try {
parseUnrecognizedElement(instance, element, props);
} catch (Exception ex) {
if (ex instanceof InterruptedException || ex instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Error in extension content: ", ex);
}
}
/**
* Substitutes property value for any references in expression.
*
* @param value value from configuration file, may contain
* literal text, property references or both
* @param props properties.
* @return evaluated expression, may still contain expressions
* if unable to expand.
*/
public String subst(final String value, final Properties props) {
try {
return OptionConverter.substVars(value, props);
} catch (IllegalArgumentException e) {
LOGGER.warn("Could not perform variable substitution.", e);
return value;
}
}
/**
* Sets a parameter based from configuration file content.
*
* @param elem param element, may not be null.
* @param propSetter property setter, may not be null.
* @param props properties
* @since 1.2.15
*/
public void setParameter(final Element elem, final PropertySetter propSetter, final Properties props) {
String name = subst(elem.getAttribute("name"), props);
String value = (elem.getAttribute("value"));
value = subst(OptionConverter.convertSpecialChars(value), props);
propSetter.setProperty(name, value);
}
/**
* Creates an object and processes any nested param elements
* but does not call activateOptions. If the class also supports
* UnrecognizedElementParser, the parseUnrecognizedElement method
* will be call for any child elements other than param.
*
* @param element element, may not be null.
* @param props properties
* @param expectedClass interface or class expected to be implemented
* by created class
* @return created class or null.
* @throws Exception thrown if the contain object should be abandoned.
* @since 1.2.15
*/
public Object parseElement(final Element element, final Properties props,
@SuppressWarnings("rawtypes") final Class expectedClass) throws Exception {
String clazz = subst(element.getAttribute("class"), props);
Object instance = OptionConverter.instantiateByClassName(clazz,
expectedClass, null);
if (instance != null) {
PropertySetter propSetter = new PropertySetter(instance);
NodeList children = element.getChildNodes();
final int length = children.getLength();
for (int loop = 0; loop < length; loop++) {
Node currentNode = children.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
Element currentElement = (Element) currentNode;
String tagName = currentElement.getTagName();
if (tagName.equals("param")) {
setParameter(currentElement, propSetter, props);
} else {
parseUnrecognizedElement(instance, currentElement, props);
}
}
}
return instance;
}
return null;
}
/**
* Used internally to parse appenders by IDREF name.
*/
private Appender findAppenderByName(Document doc, String appenderName) {
Appender appender = appenderMap.get(appenderName);
if (appender != null) {
return appender;
}
// Endre's hack:
Element element = null;
NodeList list = doc.getElementsByTagName("appender");
for (int t = 0; t < list.getLength(); t++) {
Node node = list.item(t);
NamedNodeMap map = node.getAttributes();
Node attrNode = map.getNamedItem("name");
if (appenderName.equals(attrNode.getNodeValue())) {
element = (Element) node;
break;
}
}
// Hack finished.
if (element == null) {
LOGGER.error("No appender named [{}] could be found.", appenderName);
return null;
}
appender = parseAppender(element);
if (appender != null) {
appenderMap.put(appenderName, appender);
}
return appender;
}
/**
* Used internally to parse appenders by IDREF element.
*/
public Appender findAppenderByReference(Element appenderRef) {
String appenderName = subst(appenderRef.getAttribute(REF_ATTR));
Document doc = appenderRef.getOwnerDocument();
return findAppenderByName(doc, appenderName);
}
/**
* Used internally to parse an appender element.
*/
public Appender parseAppender(Element appenderElement) {
String className = subst(appenderElement.getAttribute(CLASS_ATTR));
LOGGER.debug("Class name: [" + className + ']');
Appender appender = manager.parseAppender(className, appenderElement, this);
if (appender == null) {
appender = buildAppender(className, appenderElement);
}
return appender;
}
private Appender buildAppender(String className, Element appenderElement) {
try {
Appender appender = LoaderUtil.newInstanceOf(className);
PropertySetter propSetter = new PropertySetter(appender);
appender.setName(subst(appenderElement.getAttribute(NAME_ATTR)));
forEachElement(appenderElement.getChildNodes(), currentElement -> {
// Parse appender parameters
switch (currentElement.getTagName()) {
case PARAM_TAG:
setParameter(currentElement, propSetter);
break;
case LAYOUT_TAG:
appender.setLayout(parseLayout(currentElement));
break;
case FILTER_TAG:
Filter filter = parseFilters(currentElement);
if (filter != null) {
LOGGER.debug("Adding filter of type [{}] to appender named [{}]",
filter.getClass(), appender.getName());
appender.addFilter(filter);
}
break;
case ERROR_HANDLER_TAG:
parseErrorHandler(currentElement, appender);
break;
case APPENDER_REF_TAG:
String refName = subst(currentElement.getAttribute(REF_ATTR));
if (appender instanceof AppenderAttachable) {
AppenderAttachable aa = (AppenderAttachable) appender;
Appender child = findAppenderByReference(currentElement);
LOGGER.debug("Attaching appender named [{}] to appender named [{}].", refName,
appender.getName());
aa.addAppender(child);
} else {
LOGGER.error("Requesting attachment of appender named [{}] to appender named [{}]"
+ "which does not implement org.apache.log4j.spi.AppenderAttachable.",
refName, appender.getName());
}
break;
default:
try {
parseUnrecognizedElement(appender, currentElement, props);
} catch (Exception ex) {
throw new ConsumerException(ex);
}
}
});
propSetter.activate();
return appender;
} catch (ConsumerException ex) {
Throwable t = ex.getCause();
if (t instanceof InterruptedException || t instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create an Appender. Reported error follows.", t);
} catch (Exception oops) {
if (oops instanceof InterruptedException || oops instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create an Appender. Reported error follows.", oops);
}
return null;
}
public RewritePolicy parseRewritePolicy(Element rewritePolicyElement) {
String className = subst(rewritePolicyElement.getAttribute(CLASS_ATTR));
LOGGER.debug("Class name: [" + className + ']');
RewritePolicy policy = manager.parseRewritePolicy(className, rewritePolicyElement, this);
if (policy == null) {
policy = buildRewritePolicy(className, rewritePolicyElement);
}
return policy;
}
private RewritePolicy buildRewritePolicy(String className, Element element) {
try {
RewritePolicy policy = LoaderUtil.newInstanceOf(className);
PropertySetter propSetter = new PropertySetter(policy);
forEachElement(element.getChildNodes(), currentElement -> {
if (currentElement.getTagName().equalsIgnoreCase(PARAM_TAG)) {
setParameter(currentElement, propSetter);
}
});
propSetter.activate();
return policy;
} catch (ConsumerException ex) {
Throwable t = ex.getCause();
if (t instanceof InterruptedException || t instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create an RewritePolicy. Reported error follows.", t);
} catch (Exception oops) {
if (oops instanceof InterruptedException || oops instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create an RewritePolicy. Reported error follows.", oops);
}
return null;
}
/**
* Used internally to parse an {@link ErrorHandler} element.
*/
private void parseErrorHandler(Element element, Appender appender) {
ErrorHandler eh = (ErrorHandler) OptionConverter.instantiateByClassName(
subst(element.getAttribute(CLASS_ATTR)),
ErrorHandler.class,
null);
if (eh != null) {
eh.setAppender(appender);
PropertySetter propSetter = new PropertySetter(eh);
forEachElement(element.getChildNodes(), currentElement -> {
String tagName = currentElement.getTagName();
if (tagName.equals(PARAM_TAG)) {
setParameter(currentElement, propSetter);
}
});
propSetter.activate();
appender.setErrorHandler(eh);
}
}
/**
* Used internally to parse a filter element.
*/
public Filter parseFilters(Element filterElement) {
String className = subst(filterElement.getAttribute(CLASS_ATTR));
LOGGER.debug("Class name: [" + className + ']');
Filter filter = manager.parseFilter(className, filterElement, this);
if (filter == null) {
PropertySetter propSetter = new PropertySetter(filter);
forEachElement(filterElement.getChildNodes(), currentElement -> {
String tagName = currentElement.getTagName();
if (tagName.equals(PARAM_TAG)) {
setParameter(currentElement, propSetter);
} else {
quietParseUnrecognizedElement(filter, currentElement, props);
}
});
propSetter.activate();
}
return filter;
}
/**
* Used internally to parse an category element.
*/
private void parseCategory(Element loggerElement) {
// Create a new org.apache.log4j.Category object from the <category> element.
String catName = subst(loggerElement.getAttribute(NAME_ATTR));
boolean additivity = OptionConverter.toBoolean(subst(loggerElement.getAttribute(ADDITIVITY_ATTR)), true);
LoggerConfig loggerConfig = getLogger(catName);
if (loggerConfig == null) {
loggerConfig = new LoggerConfig(catName, org.apache.logging.log4j.Level.ERROR, additivity);
addLogger(catName, loggerConfig);
} else {
loggerConfig.setAdditive(additivity);
}
parseChildrenOfLoggerElement(loggerElement, loggerConfig, false);
}
/**
* Used internally to parse the roor category element.
*/
private void parseRoot(Element rootElement) {
LoggerConfig root = getRootLogger();
parseChildrenOfLoggerElement(rootElement, root, true);
}
/**
* Used internally to parse the children of a LoggerConfig element.
*/
private void parseChildrenOfLoggerElement(Element catElement, LoggerConfig loggerConfig, boolean isRoot) {
final PropertySetter propSetter = new PropertySetter(loggerConfig);
loggerConfig.getAppenderRefs().clear();
forEachElement(catElement.getChildNodes(), currentElement -> {
switch (currentElement.getTagName()) {
case APPENDER_REF_TAG: {
Appender appender = findAppenderByReference(currentElement);
String refName = subst(currentElement.getAttribute(REF_ATTR));
if (appender != null) {
LOGGER.debug("Adding appender named [{}] to loggerConfig [{}].", refName,
loggerConfig.getName());
loggerConfig.addAppender(getAppender(refName), null, null);
} else {
LOGGER.debug("Appender named [{}] not found.", refName);
}
break;
}
case LEVEL_TAG: case PRIORITY_TAG: {
parseLevel(currentElement, loggerConfig, isRoot);
break;
}
case PARAM_TAG: {
setParameter(currentElement, propSetter);
break;
}
default: {
quietParseUnrecognizedElement(loggerConfig, currentElement, props);
}
}
});
propSetter.activate();
}
/**
* Used internally to parse a layout element.
*/
public Layout parseLayout(Element layoutElement) {
String className = subst(layoutElement.getAttribute(CLASS_ATTR));
LOGGER.debug("Parsing layout of class: \"{}\"", className);
Layout layout = manager.parseLayout(className, layoutElement, this);
if (layout == null) {
layout = buildLayout(className, layoutElement);
}
return layout;
}
private Layout buildLayout(String className, Element layout_element) {
try {
Layout layout = LoaderUtil.newInstanceOf(className);
PropertySetter propSetter = new PropertySetter(layout);
forEachElement(layout_element.getChildNodes(), currentElement -> {
String tagName = currentElement.getTagName();
if (tagName.equals(PARAM_TAG)) {
setParameter(currentElement, propSetter);
} else {
try {
parseUnrecognizedElement(layout, currentElement, props);
} catch (Exception ex) {
throw new ConsumerException(ex);
}
}
});
propSetter.activate();
return layout;
} catch (ConsumerException ce) {
Throwable cause = ce.getCause();
if (cause instanceof InterruptedException || cause instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create the Layout. Reported error follows.", cause);
} catch (Exception oops) {
if (oops instanceof InterruptedException || oops instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create the Layout. Reported error follows.", oops);
}
return null;
}
/**
* Used internally to parse a level element.
*/
private void parseLevel(Element element, LoggerConfig logger, boolean isRoot) {
String catName = logger.getName();
if (isRoot) {
catName = "root";
}
String priStr = subst(element.getAttribute(VALUE_ATTR));
LOGGER.debug("Level value for {} is [{}].", catName, priStr);
if (INHERITED.equalsIgnoreCase(priStr) || NULL.equalsIgnoreCase(priStr)) {
if (isRoot) {
LOGGER.error("Root level cannot be inherited. Ignoring directive.");
} else {
logger.setLevel(null);
}
} else {
String className = subst(element.getAttribute(CLASS_ATTR));
if (EMPTY_STR.equals(className)) {
logger.setLevel(OptionConverter.convertLevel(priStr, org.apache.logging.log4j.Level.DEBUG));
} else {
LOGGER.debug("Desired Level sub-class: [{}]", className);
try {
Class<?> clazz = LoaderUtil.loadClass(className);
Method toLevelMethod = clazz.getMethod("toLevel", ONE_STRING_PARAM);
Level pri = (Level) toLevelMethod.invoke(null, priStr);
logger.setLevel(OptionConverter.convertLevel(pri));
} catch (Exception oops) {
if (oops instanceof InterruptedException || oops instanceof InterruptedIOException) {
Thread.currentThread().interrupt();
}
LOGGER.error("Could not create level [" + priStr +
"]. Reported error follows.", oops);
return;
}
}
}
LOGGER.debug("{} level set to {}", catName, logger.getLevel());
}
private void setParameter(Element elem, PropertySetter propSetter) {
String name = subst(elem.getAttribute(NAME_ATTR));
String value = (elem.getAttribute(VALUE_ATTR));
value = subst(OptionConverter.convertSpecialChars(value));
propSetter.setProperty(name, value);
}
/**
* Used internally to configure the log4j framework by parsing a DOM
* tree of XML elements based on <a
* href="doc-files/log4j.dtd">log4j.dtd</a>.
*/
private void parse(Element element) {
String rootElementName = element.getTagName();
if (!rootElementName.equals(CONFIGURATION_TAG)) {
if (rootElementName.equals(OLD_CONFIGURATION_TAG)) {
LOGGER.warn("The <" + OLD_CONFIGURATION_TAG +
"> element has been deprecated.");
LOGGER.warn("Use the <" + CONFIGURATION_TAG + "> element instead.");
} else {
LOGGER.error("DOM element is - not a <" + CONFIGURATION_TAG + "> element.");
return;
}
}
String debugAttrib = subst(element.getAttribute(INTERNAL_DEBUG_ATTR));
LOGGER.debug("debug attribute= \"" + debugAttrib + "\".");
// if the log4j.dtd is not specified in the XML file, then the
// "debug" attribute is returned as the empty string.
String status = "error";
if (!debugAttrib.equals("") && !debugAttrib.equals("null")) {
status = OptionConverter.toBoolean(debugAttrib, true) ? "debug" : "error";
} else {
LOGGER.debug("Ignoring " + INTERNAL_DEBUG_ATTR + " attribute.");
}
String confDebug = subst(element.getAttribute(CONFIG_DEBUG_ATTR));
if (!confDebug.equals("") && !confDebug.equals("null")) {
LOGGER.warn("The \"" + CONFIG_DEBUG_ATTR + "\" attribute is deprecated.");
LOGGER.warn("Use the \"" + INTERNAL_DEBUG_ATTR + "\" attribute instead.");
status = OptionConverter.toBoolean(confDebug, true) ? "debug" : "error";
}
final StatusConfiguration statusConfig = new StatusConfiguration().withStatus(status);
statusConfig.initialize();
forEachElement(element.getChildNodes(), currentElement -> {
switch (currentElement.getTagName()) {
case CATEGORY: case LOGGER_ELEMENT:
parseCategory(currentElement);
break;
case ROOT_TAG:
parseRoot(currentElement);
break;
case RENDERER_TAG:
LOGGER.warn("Renderers are not supported by Log4j 2 and will be ignored.");
break;
case THROWABLE_RENDERER_TAG:
LOGGER.warn("Throwable Renderers are not supported by Log4j 2 and will be ignored.");
break;
case CATEGORY_FACTORY_TAG: case LOGGER_FACTORY_TAG:
LOGGER.warn("Log4j 1 Logger factories are not supported by Log4j 2 and will be ignored.");
break;
case APPENDER_TAG:
Appender appender = parseAppender(currentElement);
appenderMap.put(appender.getName(), appender);
if (appender instanceof AppenderWrapper) {
addAppender(((AppenderWrapper) appender).getAppender());
} else {
addAppender(new AppenderAdapter(appender).getAdapter());
}
break;
default:
quietParseUnrecognizedElement(null, currentElement, props);
}
});
}
private String subst(final String value) {
return getStrSubstitutor().replace(value);
}
public static void forEachElement(NodeList list, Consumer<Element> consumer) {
final int length = list.getLength();
for (int loop = 0; loop < length; loop++) {
Node currentNode = list.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
Element currentElement = (Element) currentNode;
consumer.accept(currentElement);
}
}
}
private interface ParseAction {
Document parse(final DocumentBuilder parser) throws SAXException, IOException;
}
private static class SAXErrorHandler implements org.xml.sax.ErrorHandler {
private static final org.apache.logging.log4j.Logger LOGGER = StatusLogger.getLogger();
@Override
public void error(final SAXParseException ex) {
emitMessage("Continuable parsing error ", ex);
}
@Override
public void fatalError(final SAXParseException ex) {
emitMessage("Fatal parsing error ", ex);
}
@Override
public void warning(final SAXParseException ex) {
emitMessage("Parsing warning ", ex);
}
private static void emitMessage(final String msg, final SAXParseException ex) {
LOGGER.warn("{} {} and column {}", msg, ex.getLineNumber(), ex.getColumnNumber());
LOGGER.warn(ex.getMessage(), ex.getException());
}
}
private static class ConsumerException extends RuntimeException {
ConsumerException(Exception ex) {
super(ex);
}
}
}
⏎ org/apache/log4j/xml/XmlConfiguration.java
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⇒ Source Code for Apache Log4j JMX GUI
⇐ Source Code for Apache Log4j Flume Appender
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