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/*
* 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.dubbo.common.logger;
import org.apache.dubbo.common.logger.jcl.JclLoggerAdapter;
import org.apache.dubbo.common.logger.jdk.JdkLoggerAdapter;
import org.apache.dubbo.common.logger.log4j.Log4jLoggerAdapter;
import org.apache.dubbo.common.logger.log4j2.Log4j2LoggerAdapter;
import org.apache.dubbo.common.logger.slf4j.Slf4jLoggerAdapter;
import org.apache.dubbo.common.logger.support.FailsafeErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.support.FailsafeLogger;
import org.apache.dubbo.common.utils.ConcurrentHashMapUtils;
import org.apache.dubbo.rpc.model.FrameworkModel;
import java.io.File;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* Logger factory
*/
public class LoggerFactory {
private static final ConcurrentMap LOGGERS = new ConcurrentHashMap<>();
private static final ConcurrentMap ERROR_TYPE_AWARE_LOGGERS =
new ConcurrentHashMap<>();
private static volatile LoggerAdapter loggerAdapter;
// search common-used logging frameworks
static {
String logger = System.getProperty("dubbo.application.logger", "");
switch (logger) {
case Slf4jLoggerAdapter.NAME:
setLoggerAdapter(new Slf4jLoggerAdapter());
break;
case JclLoggerAdapter.NAME:
setLoggerAdapter(new JclLoggerAdapter());
break;
case Log4jLoggerAdapter.NAME:
setLoggerAdapter(new Log4jLoggerAdapter());
break;
case JdkLoggerAdapter.NAME:
setLoggerAdapter(new JdkLoggerAdapter());
break;
case Log4j2LoggerAdapter.NAME:
setLoggerAdapter(new Log4j2LoggerAdapter());
break;
default:
List> candidates = Arrays.asList(
Log4jLoggerAdapter.class,
Slf4jLoggerAdapter.class,
Log4j2LoggerAdapter.class,
JclLoggerAdapter.class,
JdkLoggerAdapter.class);
boolean found = false;
// try to use the first available adapter
for (Class clazz : candidates) {
try {
LoggerAdapter loggerAdapter =
clazz.getDeclaredConstructor().newInstance();
loggerAdapter.getLogger(LoggerFactory.class);
if (loggerAdapter.isConfigured()) {
setLoggerAdapter(loggerAdapter);
found = true;
break;
}
} catch (Exception | LinkageError ignored) {
// ignore
}
}
if (found) {
break;
}
System.err.println("Dubbo: Unable to find a proper configured logger to log out.");
for (Class clazz : candidates) {
try {
LoggerAdapter loggerAdapter =
clazz.getDeclaredConstructor().newInstance();
loggerAdapter.getLogger(LoggerFactory.class);
setLoggerAdapter(loggerAdapter);
found = true;
break;
} catch (Throwable ignored) {
// ignore
}
}
if (found) {
System.err.println(
"Dubbo: Using default logger: "
+ loggerAdapter.getClass().getName() + ". "
+ "If you cannot see any log, please configure -Ddubbo.application.logger property to your preferred logging framework.");
} else {
System.err.println(
"Dubbo: Unable to find any available logger adapter to log out. Dubbo logs will be ignored. "
+ "Please configure -Ddubbo.application.logger property and add corresponding logging library to classpath.");
}
}
}
private LoggerFactory() {}
public static void setLoggerAdapter(FrameworkModel frameworkModel, String loggerAdapter) {
if (loggerAdapter != null && loggerAdapter.length() > 0) {
setLoggerAdapter(
frameworkModel.getExtensionLoader(LoggerAdapter.class).getExtension(loggerAdapter));
}
}
/**
* Set logger provider
*
* @param loggerAdapter logger provider
*/
public static void setLoggerAdapter(LoggerAdapter loggerAdapter) {
if (loggerAdapter != null) {
if (loggerAdapter == LoggerFactory.loggerAdapter) {
return;
}
loggerAdapter.getLogger(LoggerFactory.class.getName());
LoggerFactory.loggerAdapter = loggerAdapter;
for (Map.Entry entry : LOGGERS.entrySet()) {
entry.getValue().setLogger(LoggerFactory.loggerAdapter.getLogger(entry.getKey()));
}
}
}
/**
* Get logger provider
*
* @param key the returned logger will be named after clazz
* @return logger
*/
public static Logger getLogger(Class key) {
return ConcurrentHashMapUtils.computeIfAbsent(
LOGGERS, key.getName(), name -> new FailsafeLogger(loggerAdapter.getLogger(name)));
}
/**
* Get logger provider
*
* @param key the returned logger will be named after key
* @return logger provider
*/
public static Logger getLogger(String key) {
return ConcurrentHashMapUtils.computeIfAbsent(
LOGGERS, key, k -> new FailsafeLogger(loggerAdapter.getLogger(k)));
}
/**
* Get error type aware logger by Class object.
*
* @param key the returned logger will be named after clazz
* @return error type aware logger
*/
public static ErrorTypeAwareLogger getErrorTypeAwareLogger(Class key) {
return ConcurrentHashMapUtils.computeIfAbsent(
ERROR_TYPE_AWARE_LOGGERS,
key.getName(),
name -> new FailsafeErrorTypeAwareLogger(loggerAdapter.getLogger(name)));
}
/**
* Get error type aware logger by a String key.
*
* @param key the returned logger will be named after key
* @return error type aware logger
*/
public static ErrorTypeAwareLogger getErrorTypeAwareLogger(String key) {
return ConcurrentHashMapUtils.computeIfAbsent(
ERROR_TYPE_AWARE_LOGGERS, key, k -> new FailsafeErrorTypeAwareLogger(loggerAdapter.getLogger(k)));
}
/**
* Get logging level
*
* @return logging level
*/
public static Level getLevel() {
return loggerAdapter.getLevel();
}
/**
* Set the current logging level
*
* @param level logging level
*/
public static void setLevel(Level level) {
loggerAdapter.setLevel(level);
}
/**
* Get the current logging file
*
* @return current logging file
*/
public static File getFile() {
return loggerAdapter.getFile();
}
/**
* Get the available adapter names
*
* @return available adapter names
*/
public static List getAvailableAdapter() {
Map, String> candidates = new HashMap<>();
candidates.put(Log4jLoggerAdapter.class, "log4j");
candidates.put(Slf4jLoggerAdapter.class, "slf4j");
candidates.put(Log4j2LoggerAdapter.class, "log4j2");
candidates.put(JclLoggerAdapter.class, "jcl");
candidates.put(JdkLoggerAdapter.class, "jdk");
List result = new LinkedList<>();
for (Map.Entry, String> entry : candidates.entrySet()) {
try {
LoggerAdapter loggerAdapter =
entry.getKey().getDeclaredConstructor().newInstance();
loggerAdapter.getLogger(LoggerFactory.class);
result.add(entry.getValue());
} catch (Exception ignored) {
// ignored
}
}
return result;
}
/**
* Get the current adapter name
*
* @return current adapter name
*/
public static String getCurrentAdapter() {
Map, String> candidates = new HashMap<>();
candidates.put(Log4jLoggerAdapter.class, "log4j");
candidates.put(Slf4jLoggerAdapter.class, "slf4j");
candidates.put(Log4j2LoggerAdapter.class, "log4j2");
candidates.put(JclLoggerAdapter.class, "jcl");
candidates.put(JdkLoggerAdapter.class, "jdk");
String name = candidates.get(loggerAdapter.getClass());
if (name == null) {
name = loggerAdapter.getClass().getSimpleName();
}
return name;
}
}