spring JavaLoggingSystem 源码
springboot JavaLoggingSystem 代码
文件路径:/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/java/JavaLoggingSystem.java
/*
* Copyright 2012-2022 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.boot.logging.java;
import java.io.ByteArrayInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.Logger;
import org.springframework.boot.logging.AbstractLoggingSystem;
import org.springframework.boot.logging.LogFile;
import org.springframework.boot.logging.LogLevel;
import org.springframework.boot.logging.LoggerConfiguration;
import org.springframework.boot.logging.LoggingInitializationContext;
import org.springframework.boot.logging.LoggingSystem;
import org.springframework.boot.logging.LoggingSystemFactory;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.ResourceUtils;
import org.springframework.util.StringUtils;
/**
* {@link LoggingSystem} for {@link Logger java.util.logging}.
*
* @author Phillip Webb
* @author Dave Syer
* @author Andy Wilkinson
* @author Ben Hale
* @since 1.0.0
*/
public class JavaLoggingSystem extends AbstractLoggingSystem {
private static final LogLevels<Level> LEVELS = new LogLevels<>();
static {
LEVELS.map(LogLevel.TRACE, Level.FINEST);
LEVELS.map(LogLevel.DEBUG, Level.FINE);
LEVELS.map(LogLevel.INFO, Level.INFO);
LEVELS.map(LogLevel.WARN, Level.WARNING);
LEVELS.map(LogLevel.ERROR, Level.SEVERE);
LEVELS.map(LogLevel.FATAL, Level.SEVERE);
LEVELS.map(LogLevel.OFF, Level.OFF);
}
private final Set<Logger> configuredLoggers = Collections.synchronizedSet(new HashSet<>());
public JavaLoggingSystem(ClassLoader classLoader) {
super(classLoader);
}
@Override
protected String[] getStandardConfigLocations() {
return new String[] { "logging.properties" };
}
@Override
public void beforeInitialize() {
super.beforeInitialize();
Logger.getLogger("").setLevel(Level.SEVERE);
}
@Override
protected void loadDefaults(LoggingInitializationContext initializationContext, LogFile logFile) {
if (logFile != null) {
loadConfiguration(getPackagedConfigFile("logging-file.properties"), logFile);
}
else {
loadConfiguration(getPackagedConfigFile("logging.properties"), null);
}
}
@Override
protected void loadConfiguration(LoggingInitializationContext initializationContext, String location,
LogFile logFile) {
loadConfiguration(location, logFile);
}
protected void loadConfiguration(String location, LogFile logFile) {
Assert.notNull(location, "Location must not be null");
try {
String configuration = FileCopyUtils
.copyToString(new InputStreamReader(ResourceUtils.getURL(location).openStream()));
if (logFile != null) {
configuration = configuration.replace("${LOG_FILE}", StringUtils.cleanPath(logFile.toString()));
}
LogManager.getLogManager().readConfiguration(new ByteArrayInputStream(configuration.getBytes()));
}
catch (Exception ex) {
throw new IllegalStateException("Could not initialize Java logging from " + location, ex);
}
}
@Override
public Set<LogLevel> getSupportedLogLevels() {
return LEVELS.getSupported();
}
@Override
public void setLogLevel(String loggerName, LogLevel level) {
if (loggerName == null || ROOT_LOGGER_NAME.equals(loggerName)) {
loggerName = "";
}
Logger logger = Logger.getLogger(loggerName);
if (logger != null) {
this.configuredLoggers.add(logger);
logger.setLevel(LEVELS.convertSystemToNative(level));
}
}
@Override
public List<LoggerConfiguration> getLoggerConfigurations() {
List<LoggerConfiguration> result = new ArrayList<>();
Enumeration<String> names = LogManager.getLogManager().getLoggerNames();
while (names.hasMoreElements()) {
result.add(getLoggerConfiguration(names.nextElement()));
}
result.sort(CONFIGURATION_COMPARATOR);
return Collections.unmodifiableList(result);
}
@Override
public LoggerConfiguration getLoggerConfiguration(String loggerName) {
Logger logger = Logger.getLogger(loggerName);
if (logger == null) {
return null;
}
LogLevel level = LEVELS.convertNativeToSystem(logger.getLevel());
LogLevel effectiveLevel = LEVELS.convertNativeToSystem(getEffectiveLevel(logger));
String name = (StringUtils.hasLength(logger.getName()) ? logger.getName() : ROOT_LOGGER_NAME);
return new LoggerConfiguration(name, level, effectiveLevel);
}
private Level getEffectiveLevel(Logger root) {
Logger logger = root;
while (logger.getLevel() == null) {
logger = logger.getParent();
}
return logger.getLevel();
}
@Override
public Runnable getShutdownHandler() {
return () -> LogManager.getLogManager().reset();
}
@Override
public void cleanUp() {
this.configuredLoggers.clear();
}
/**
* {@link LoggingSystemFactory} that returns {@link JavaLoggingSystem} if possible.
*/
@Order(Ordered.LOWEST_PRECEDENCE)
public static class Factory implements LoggingSystemFactory {
private static final boolean PRESENT = ClassUtils.isPresent("java.util.logging.LogManager",
Factory.class.getClassLoader());
@Override
public LoggingSystem getLoggingSystem(ClassLoader classLoader) {
if (PRESENT) {
return new JavaLoggingSystem(classLoader);
}
return null;
}
}
}
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- 本文标签: Spring Boot Java Spring
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