org.apache.openejb.util.Logger Maven / Gradle / Ivy
/*
* 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.openejb.util;
import org.apache.openejb.loader.IO;
import org.apache.openejb.loader.SystemInstance;
import java.io.File;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Properties;
import java.util.ResourceBundle;
public class Logger {
private static final String SUFFIX = ".Messages";
private static final String OPENEJB = "org.apache.openejb";
private static LogStreamFactory logStreamFactory;
static {
configure();
}
public static synchronized void configure() {
if (logStreamFactory != null) {
return;
}
//See if user factory has been specified
String factoryName = SystemInstance.get().getOptions().get("openejb.log.factory", JuliLogStreamFactory.class.getName());
if ("jul".equalsIgnoreCase(factoryName) || "juli".equalsIgnoreCase(factoryName)) {
factoryName = JuliLogStreamFactory.class.getName();
} else if ("slf4j".equalsIgnoreCase(factoryName)) {
factoryName = Slf4jLogStreamFactory.class.getName();
} else if ("log4j".equalsIgnoreCase(factoryName)) {
if (exists("org.apache.log4j.Logger")) {
// don't use .class to avoid to force loading since log4j is not mandatory
factoryName = "org.apache.openejb.util.Log4jLogStreamFactory";
} else {
System.out.println("Cannot respect 'openejb.log.factory=log4j' setting as Log4j is not in the classpath.");
}
} else if ("pax".equalsIgnoreCase(factoryName)) {
factoryName = "org.apache.openejb.util.PaxLogStreamFactory";
}
if (factoryName != null) {
logStreamFactory = createFactory(factoryName);
}
if (isLog4jImplied()) {
logStreamFactory = createFactory("org.apache.openejb.util.Log4jLogStreamFactory");
}
//Fall back -> JUL
if (logStreamFactory == null) {
logStreamFactory = new JuliLogStreamFactory();
}
checkForIgnoredLog4jConfig();
}
private static void checkForIgnoredLog4jConfig() {
if (logStreamFactory.getClass().getName().equals("org.apache.openejb.util.Log4jLogStreamFactory")) return;
try {
final Properties configFile = log4j(loadLoggingProperties());
final Properties systemProperties = log4j(SystemInstance.get().getProperties());
if (configFile.size() == 0 && systemProperties.size() == 0) return;
final LogStream stream = logStreamFactory.createLogStream(LogCategory.OPENEJB);
stream.warn("Log4j not installed. The following properties will be ignored.");
final String format = "Ignored %s property '%s'";
for (final Object key : configFile.keySet()) {
stream.warn(String.format(format, "conf/logging.properties", key));
}
for (final Object key : systemProperties.keySet()) {
stream.warn(String.format(format, "Property overrides", key));
}
} catch (Throwable e) {
// added strong catch block just in case
// This check is only a convenience
}
}
private static LogStreamFactory createFactory(final String factoryName) {
final Class factoryClass = load(factoryName);
if (factoryClass == null) return null;
try {
//Try and use the user specified factory
return (LogStreamFactory) factoryClass.newInstance();
} catch (Throwable e) {
//Ignore
}
return null;
}
private static Class load(final String factoryName) {
try {
final ClassLoader classLoader = Logger.class.getClassLoader();
return classLoader.loadClass(factoryName);
} catch (Throwable e) {
//Ignore
}
try {
final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
return contextClassLoader.loadClass(factoryName);
} catch (Throwable e1) {
//Ignore
}
try {
return Class.forName(factoryName);
} catch (Throwable e2) {
//Ignore
}
return null;
}
/**
* Computes the parent of a resource name. E.g. if we pass in a key of
* a.b.c, it returns the value a.b
*/
private static final Computable heirarchyResolver = new Computable() {
@Override
public String compute(final String key) throws InterruptedException {
final int index = key.lastIndexOf(".");
final String parent = key.substring(0, index);
if (parent.contains(OPENEJB))
return parent;
return null;
}
};
/**
* Simply returns the ResourceBundle for a given baseName
*/
private static final Computable bundleResolver = new Computable() {
@Override
public ResourceBundle compute(final String baseName) throws InterruptedException {
try {
return ResourceBundle.getBundle(baseName + SUFFIX);
} catch (MissingResourceException e) {
return null;
}
}
};
/**
* Builds a Logger object and returns it
*/
private static final Computable loggerResolver = new Computable() {
@Override
public Logger compute(final Object[] args) throws InterruptedException {
final LogCategory category = (LogCategory) args[0];
final LogStream logStream = logStreamFactory.createLogStream(category);
final String baseName = (String) args[1];
return new Logger(category, logStream, baseName);
}
};
/**
* Creates a MessageFormat object for a message and returns it
*/
private static final Computable messageFormatResolver = new Computable() {
@Override
public MessageFormat compute(final String message) throws InterruptedException {
return new MessageFormat(message);
}
};
/**
* Cache of parent-child relationships between resource names
*/
private static final Computable heirarchyCache = new Memoizer(heirarchyResolver);
/**
* Cache of ResourceBundles
*/
private static final Computable bundleCache = new Memoizer(bundleResolver);
/**
* Cache of Loggers
*/
private static final Computable loggerCache = new Memoizer(loggerResolver);
/**
* Cache of MessageFormats
*/
private static final Computable messageFormatCache = new Memoizer(messageFormatResolver);
/**
* Finds a Logger from the cache and returns it. If not found in cache then builds a Logger and returns it.
*
* @param category - The category of the logger
* @param baseName - The baseName for the ResourceBundle
* @return Logger
*/
public static Logger getInstance(final LogCategory category, final String baseName) {
try {
return loggerCache.compute(new Object[]{category, baseName});
} catch (InterruptedException e) {
// Don't return null here. Just create a new Logger and set it up.
// It will not be stored in the cache, but a later lookup for the
// same Logger would probably end up in the cache
final LogStream logStream = logStreamFactory.createLogStream(category);
return new Logger(category, logStream, baseName);
}
}
private final LogCategory category;
private final LogStream logStream;
private final String baseName;
public Logger(final LogCategory category, final LogStream logStream, final String baseName) {
this.category = category;
this.logStream = logStream;
this.baseName = baseName;
}
public static Logger getInstance(final LogCategory category, final Class clazz) {
return getInstance(category, packageName(clazz));
}
private static String packageName(final Class clazz) {
final String name = clazz.getName();
return name.substring(0, name.lastIndexOf("."));
}
private static Boolean isLog4j = null;
public static boolean isLog4jImplied() {
if (null == isLog4j) {
isLog4j = false;
final List locations = new ArrayList();
{
final Properties configFile = log4j(loadLoggingProperties());
final Properties systemProperties = log4j(SystemInstance.get().getProperties());
if (configFile.size() > 0) locations.add("conf/logging.properties");
if (systemProperties.size() > 0) locations.add("Properties overrides");
}
if (locations.size() > 0) {
if (exists("org.apache.log4j.Logger")) {
isLog4j = true;
}
}
}
return isLog4j;
}
private static boolean exists(final String s) {
return load(s) != null;
}
private static Properties log4j(final Properties system) {
final Properties properties = new Properties();
for (final Map.Entry entry : system.entrySet()) {
final String key = entry.getKey().toString();
if (key.startsWith("log4j.") && !key.equals("log4j.configuration")) {
properties.put(key, entry.getValue());
}
}
return properties;
}
private static Properties loadLoggingProperties() {
try {
final File conf = SystemInstance.get().getConf(null);
final File file = new File(conf, "logging.properties");
return IO.readProperties(file);
} catch (IOException e) {
return new Properties();
}
}
public Logger getChildLogger(final String child) {
return Logger.getInstance(this.category.createChild(child), this.baseName);
}
/**
* Formats a given message
*
* @param message String
* @param args Object...
* @return the formatted message
*/
private String formatMessage(final String message, final Object... args) {
if (args.length == 0) return message;
try {
final MessageFormat mf = messageFormatCache.compute(message);
return mf.format(args);
} catch (Exception e) {
return "Error in formatting message " + message;
}
}
public boolean isDebugEnabled() {
return logStream.isDebugEnabled();
}
public boolean isErrorEnabled() {
return logStream.isErrorEnabled();
}
public boolean isFatalEnabled() {
return logStream.isFatalEnabled();
}
public boolean isInfoEnabled() {
return logStream.isInfoEnabled();
}
public boolean isWarningEnabled() {
return logStream.isWarnEnabled();
}
public boolean isLevelEnable(final String level) {
if ("info".equals(level.toLowerCase())) {
return isInfoEnabled();
} else if ("debug".equals(level.toLowerCase())) {
return isDebugEnabled();
} else if ("warning".equals(level.toLowerCase())) {
return isWarningEnabled();
} else if ("fatal".equals(level.toLowerCase())) {
return isFatalEnabled();
} else if ("error".equals(level.toLowerCase())) {
return isErrorEnabled();
}
return false;
}
public void log(final String level, final String message) {
if ("info".equals(level.toLowerCase())) {
info(message);
} else if ("debug".equals(level.toLowerCase())) {
debug(message);
} else if ("warning".equals(level.toLowerCase())) {
warning(message);
} else if ("fatal".equals(level.toLowerCase())) {
fatal(message);
} else if ("error".equals(level.toLowerCase())) {
error(message);
}
}
/**
* If this level is enabled, then it finds a message for the given key and logs it
*
* @param message - This could be a plain message or a key in Messages.properties
* @return the formatted i18n message
*/
public String debug(final String message) {
if (isDebugEnabled()) {
final String msg = getMessage(message, baseName);
logStream.debug(msg);
return msg;
}
return message;
}
public String debug(final String message, final Object... args) {
if (isDebugEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.debug(msg);
return msg;
}
return message;
}
public String debug(final String message, final Throwable t) {
if (isDebugEnabled()) {
final String msg = getMessage(message, baseName);
logStream.debug(msg, t);
return msg;
}
return message;
}
public String debug(final String message, final Throwable t, final Object... args) {
if (isDebugEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.debug(msg, t);
return msg;
}
return message;
}
public String error(final String message) {
if (isErrorEnabled()) {
final String msg = getMessage(message, baseName);
logStream.error(msg);
return msg;
}
return message;
}
public String error(final String message, final Object... args) {
if (isErrorEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.error(msg);
return msg;
}
return message;
}
public String error(final String message, final Throwable t) {
if (isErrorEnabled()) {
final String msg = getMessage(message, baseName);
logStream.error(msg, t);
return msg;
}
return message;
}
public String error(final String message, final Throwable t, final Object... args) {
if (isErrorEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.error(msg, t);
return msg;
}
return message;
}
public String fatal(final String message) {
if (isFatalEnabled()) {
final String msg = getMessage(message, baseName);
logStream.fatal(msg);
return msg;
}
return message;
}
public String fatal(final String message, final Object... args) {
if (isFatalEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.fatal(msg);
return msg;
}
return message;
}
public String fatal(final String message, final Throwable t) {
if (isFatalEnabled()) {
final String msg = getMessage(message, baseName);
logStream.fatal(msg, t);
return msg;
}
return message;
}
public String fatal(final String message, final Throwable t, final Object... args) {
if (isFatalEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.fatal(msg, t);
return msg;
}
return message;
}
public String info(final String message) {
if (isInfoEnabled()) {
final String msg = getMessage(message, baseName);
logStream.info(msg);
return msg;
}
return message;
}
public String info(final String message, final Object... args) {
if (isInfoEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.info(msg);
return msg;
}
return message;
}
public String info(final String message, final Throwable t) {
if (isInfoEnabled()) {
final String msg = getMessage(message, baseName);
logStream.info(msg, t);
return msg;
}
return message;
}
public String info(final String message, final Throwable t, final Object... args) {
if (isInfoEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.info(msg, t);
return msg;
}
return message;
}
public String warning(final String message) {
if (isWarningEnabled()) {
final String msg = getMessage(message, baseName);
logStream.warn(msg);
return msg;
}
return message;
}
public String warning(final String message, final Object... args) {
if (isWarningEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.warn(msg);
return msg;
}
return message;
}
public String warning(final String message, final Throwable t) {
if (isWarningEnabled()) {
final String msg = getMessage(message, baseName);
logStream.warn(msg, t);
return msg;
}
return message;
}
public String warning(final String message, final Throwable t, final Object... args) {
if (isWarningEnabled()) {
String msg = getMessage(message, baseName);
msg = formatMessage(msg, args);
logStream.warn(msg, t);
return msg;
}
return message;
}
/**
* Given a key and a baseName, this method computes a message for a key. if
* the key is not found in this ResourceBundle for this baseName, then it
* recursively looks up its parent to find the message for a key. If no
* message is found for a key, the key is returned as is and is logged by
* the logger.
*
* @param key String
* @param baseName String
* @return String
*/
private String getMessage(final String key, final String baseName) {
try {
final ResourceBundle bundle = bundleCache.compute(baseName);
if (bundle != null) {
try {
return bundle.getString(key);
} catch (MissingResourceException e) {
final String parentName = heirarchyCache.compute(baseName);
if (parentName == null)
return key;
else
return getMessage(key, parentName);
}
} else {
final String parentName = heirarchyCache.compute(baseName);
if (parentName == null)
return key;
else
return getMessage(key, parentName);
}
} catch (InterruptedException e) {
// ignore
}
return key;
}
}
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