/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2013, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.jul;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.spi.LoggerContextListener;
import ch.qos.logback.core.spi.ContextAwareBase;
import ch.qos.logback.core.spi.LifeCycle;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.LogManager;
/**
* Propagate level changes made to a logback logger into the equivalent logger in j.u.l.
*/
public class LevelChangePropagator extends ContextAwareBase implements LoggerContextListener, LifeCycle {
private Set julLoggerSet = new HashSet();
boolean isStarted = false;
boolean resetJUL = false;
public void setResetJUL(boolean resetJUL) {
this.resetJUL = resetJUL;
}
public boolean isResetResistant() {
return false;
}
public void onStart(LoggerContext context) {
}
public void onReset(LoggerContext context) {
}
public void onStop(LoggerContext context) {
}
public void onLevelChange(Logger logger, Level level) {
propagate(logger, level);
}
private void propagate(Logger logger, Level level) {
addInfo("Propagating " + level + " level on " + logger + " onto the JUL framework");
java.util.logging.Logger julLogger = JULHelper.asJULLogger(logger);
// prevent garbage collection of jul loggers whose level we set
// see also http://jira.qos.ch/browse/LBCLASSIC-256
julLoggerSet.add(julLogger);
java.util.logging.Level julLevel = JULHelper.asJULLevel(level);
julLogger.setLevel(julLevel);
}
public void resetJULLevels() {
LogManager lm = LogManager.getLogManager();
Enumeration e = lm.getLoggerNames();
while (e.hasMoreElements()) {
String loggerName = (String) e.nextElement();
java.util.logging.Logger julLogger = lm.getLogger(loggerName);
if (JULHelper.isRegularNonRootLogger(julLogger) && julLogger.getLevel() != null) {
addInfo("Setting level of jul logger [" + loggerName + "] to null");
julLogger.setLevel(null);
}
}
}
private void propagateExistingLoggerLevels() {
LoggerContext loggerContext = (LoggerContext) context;
List<Logger> loggerList = loggerContext.getLoggerList();
for (Logger l : loggerList) {
if (l.getLevel() != null) {
propagate(l, l.getLevel());
}
}
}
public void start() {
if (resetJUL) {
resetJULLevels();
}
propagateExistingLoggerLevels();
isStarted = true;
}
public void stop() {
isStarted = false;
}
public boolean isStarted() {
return isStarted;
}
}