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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.logging;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.Appender;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.Configurator;
import org.apache.logging.log4j.core.config.LoggerConfig;
import org.apache.logging.log4j.message.MessageFactory;
import org.elasticsearch.common.Classes;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.node.Node;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import static java.util.Arrays.asList;
import static javax.security.auth.login.Configuration.getConfiguration;
import static org.elasticsearch.common.util.CollectionUtils.asArrayList;
/**
* A set of utilities around Logging.
*/
public class Loggers {
public static final String SPACE = " ";
public static Logger getLogger(Class clazz, Settings settings, ShardId shardId, String... prefixes) {
return getLogger(clazz, settings, shardId.getIndex(), asArrayList(Integer.toString(shardId.id()), prefixes).toArray(new String[0]));
}
/**
* Just like {@link #getLogger(Class, org.elasticsearch.common.settings.Settings, ShardId, String...)} but String loggerName instead of
* Class.
*/
public static Logger getLogger(String loggerName, Settings settings, ShardId shardId, String... prefixes) {
return getLogger(loggerName, settings,
asArrayList(shardId.getIndexName(), Integer.toString(shardId.id()), prefixes).toArray(new String[0]));
}
public static Logger getLogger(Class clazz, Settings settings, Index index, String... prefixes) {
return getLogger(clazz, settings, asArrayList(SPACE, index.getName(), prefixes).toArray(new String[0]));
}
public static Logger getLogger(Class clazz, Settings settings, String... prefixes) {
final List prefixesList = prefixesList(settings, prefixes);
return getLogger(clazz, prefixesList.toArray(new String[prefixesList.size()]));
}
public static Logger getLogger(String loggerName, Settings settings, String... prefixes) {
final List prefixesList = prefixesList(settings, prefixes);
return getLogger(loggerName, prefixesList.toArray(new String[prefixesList.size()]));
}
private static List prefixesList(Settings settings, String... prefixes) {
List prefixesList = new ArrayList<>();
if (Node.NODE_NAME_SETTING.exists(settings)) {
prefixesList.add(Node.NODE_NAME_SETTING.get(settings));
}
if (prefixes != null && prefixes.length > 0) {
prefixesList.addAll(asList(prefixes));
}
return prefixesList;
}
public static Logger getLogger(Logger parentLogger, String s) {
assert parentLogger instanceof PrefixLogger;
return ESLoggerFactory.getLogger(((PrefixLogger)parentLogger).prefix(), parentLogger.getName() + s);
}
public static Logger getLogger(String s) {
return ESLoggerFactory.getLogger(s);
}
public static Logger getLogger(Class clazz) {
return ESLoggerFactory.getLogger(clazz);
}
public static Logger getLogger(Class clazz, String... prefixes) {
return ESLoggerFactory.getLogger(formatPrefix(prefixes), clazz);
}
public static Logger getLogger(String name, String... prefixes) {
return ESLoggerFactory.getLogger(formatPrefix(prefixes), name);
}
private static String formatPrefix(String... prefixes) {
String prefix = null;
if (prefixes != null && prefixes.length > 0) {
StringBuilder sb = new StringBuilder();
for (String prefixX : prefixes) {
if (prefixX != null) {
if (prefixX.equals(SPACE)) {
sb.append(" ");
} else {
sb.append("[").append(prefixX).append("]");
}
}
}
if (sb.length() > 0) {
sb.append(" ");
prefix = sb.toString();
}
}
return prefix;
}
/**
* Set the level of the logger. If the new level is null, the logger will inherit it's level from its nearest ancestor with a non-null
* level.
*/
public static void setLevel(Logger logger, String level) {
final Level l;
if (level == null) {
l = null;
} else {
l = Level.valueOf(level);
}
setLevel(logger, l);
}
public static void setLevel(Logger logger, Level level) {
if (!LogManager.ROOT_LOGGER_NAME.equals(logger.getName())) {
Configurator.setLevel(logger.getName(), level);
} else {
final LoggerContext ctx = LoggerContext.getContext(false);
final Configuration config = ctx.getConfiguration();
final LoggerConfig loggerConfig = config.getLoggerConfig(logger.getName());
loggerConfig.setLevel(level);
ctx.updateLoggers();
}
// we have to descend the hierarchy
final LoggerContext ctx = LoggerContext.getContext(false);
for (final LoggerConfig loggerConfig : ctx.getConfiguration().getLoggers().values()) {
if (LogManager.ROOT_LOGGER_NAME.equals(logger.getName()) || loggerConfig.getName().startsWith(logger.getName() + ".")) {
Configurator.setLevel(loggerConfig.getName(), level);
}
}
}
public static void addAppender(final Logger logger, final Appender appender) {
final LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
final Configuration config = ctx.getConfiguration();
config.addAppender(appender);
LoggerConfig loggerConfig = config.getLoggerConfig(logger.getName());
if (!logger.getName().equals(loggerConfig.getName())) {
loggerConfig = new LoggerConfig(logger.getName(), logger.getLevel(), true);
config.addLogger(logger.getName(), loggerConfig);
}
loggerConfig.addAppender(appender, null, null);
ctx.updateLoggers();
}
public static void removeAppender(final Logger logger, final Appender appender) {
final LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
final Configuration config = ctx.getConfiguration();
LoggerConfig loggerConfig = config.getLoggerConfig(logger.getName());
if (!logger.getName().equals(loggerConfig.getName())) {
loggerConfig = new LoggerConfig(logger.getName(), logger.getLevel(), true);
config.addLogger(logger.getName(), loggerConfig);
}
loggerConfig.removeAppender(appender.getName());
ctx.updateLoggers();
}
public static Appender findAppender(final Logger logger, final Class clazz) {
final LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
final Configuration config = ctx.getConfiguration();
final LoggerConfig loggerConfig = config.getLoggerConfig(logger.getName());
for (final Map.Entry entry : loggerConfig.getAppenders().entrySet()) {
if (entry.getValue().getClass().equals(clazz)) {
return entry.getValue();
}
}
return null;
}
}