Reload4jLoggerAdapter.java
/**
* Copyright (c) 2004-2011 QOS.ch
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
package org.slf4j.reload4j;
import static org.slf4j.event.EventConstants.NA_SUBST;
import java.io.Serializable;
import org.apache.log4j.Level;
import org.apache.log4j.spi.LocationInfo;
import org.apache.log4j.spi.ThrowableInformation;
import org.slf4j.Logger;
import org.slf4j.Marker;
import org.slf4j.event.DefaultLoggingEvent;
import org.slf4j.event.LoggingEvent;
import org.slf4j.event.SubstituteLoggingEvent;
import org.slf4j.helpers.LegacyAbstractLogger;
import org.slf4j.helpers.MessageFormatter;
import org.slf4j.helpers.NormalizedParameters;
import org.slf4j.helpers.SubstituteLogger;
import org.slf4j.spi.LocationAwareLogger;
import org.slf4j.spi.LoggingEventAware;
import org.slf4j.spi.LoggingEventBuilder;
/**
* A wrapper over {@link org.apache.log4j.Logger org.apache.log4j.Logger}
* conforming to the {@link Logger} interface.
*
* <p>
* Note that the logging levels mentioned in this class refer to those defined
* in the <a href=
* "http://logging.apache.org/log4j/docs/api/org/apache/log4j/Level.html">
* <code>org.apache.log4j.Level</code></a> class.
*
* <p>This class is a copy-and-paste of Log4j12LoggerAdapter from the
* slf4j-log4j12 module.</p>
*
* @author Ceki Gülcü
* @since 2.0.0-alpha6
*/
public final class Reload4jLoggerAdapter extends LegacyAbstractLogger implements LocationAwareLogger, LoggingEventAware, Serializable {
private static final long serialVersionUID = 6989384227325275811L;
final transient org.apache.log4j.Logger logger;
final static String FQCN_NOMINAL = org.slf4j.helpers.AbstractLogger.class.getName();
final static String FQCN_SUBSTITUE = FQCN_NOMINAL;
final static String FQCN_FLUENT = org.slf4j.spi.DefaultLoggingEventBuilder.class.getName();
// WARN: Reload4jLoggerAdapter constructor should have only package access so
// that only Reload4jLoggerFactory be able to create one.
Reload4jLoggerAdapter(org.apache.log4j.Logger logger) {
this.logger = logger;
this.name = logger.getName();
}
/**
* Is this logger instance enabled for the TRACE level?
*
* @return True if this Logger is enabled for level TRACE, false otherwise.
*/
public boolean isTraceEnabled() {
return logger.isTraceEnabled();
}
/**
* Is this logger instance enabled for the DEBUG level?
*
* @return True if this Logger is enabled for level DEBUG, false otherwise.
*/
public boolean isDebugEnabled() {
return logger.isDebugEnabled();
}
/**
* Is this logger instance enabled for the INFO level?
*
* @return True if this Logger is enabled for the INFO level, false otherwise.
*/
public boolean isInfoEnabled() {
return logger.isInfoEnabled();
}
/**
* Is this logger instance enabled for the WARN level?
*
* @return True if this Logger is enabled for the WARN level, false otherwise.
*/
public boolean isWarnEnabled() {
return logger.isEnabledFor(Level.WARN);
}
/**
* Is this logger instance enabled for level ERROR?
*
* @return True if this Logger is enabled for level ERROR, false otherwise.
*/
public boolean isErrorEnabled() {
return logger.isEnabledFor(Level.ERROR);
}
@Override
public void log(Marker marker, String callerFQCN, int level, String msg, Object[] arguments, Throwable t) {
Level log4jLevel = toLog4jLevel(level);
NormalizedParameters np = NormalizedParameters.normalize(msg, arguments, t);
String formattedMessage = MessageFormatter.basicArrayFormat(np.getMessage(), np.getArguments());
logger.log(callerFQCN, log4jLevel, formattedMessage, np.getThrowable());
}
@Override
protected void handleNormalizedLoggingCall(org.slf4j.event.Level level, Marker marker, String msg, Object[] arguments, Throwable throwable) {
Level log4jLevel = toLog4jLevel(level.toInt());
String formattedMessage = MessageFormatter.basicArrayFormat(msg, arguments);
logger.log(getFullyQualifiedCallerName(), log4jLevel, formattedMessage, throwable);
}
/**
* Called by {@link SubstituteLogger} or by {@link LoggingEventBuilder} instances
* @param event
*/
public void log(LoggingEvent event) {
Level log4jLevel = toLog4jLevel(event.getLevel().toInt());
if (!logger.isEnabledFor(log4jLevel))
return;
org.apache.log4j.spi.LoggingEvent log4jevent = event2Log4jEvent(event, log4jLevel);
logger.callAppenders(log4jevent);
}
private org.apache.log4j.spi.LoggingEvent event2Log4jEvent(LoggingEvent event, Level log4jLevel) {
String formattedMessage = MessageFormatter.basicArrayFormat(event.getMessage(), event.getArgumentArray());
LocationInfo locationInfo = null;
String fqcn = null;
if (event instanceof SubstituteLoggingEvent) {
locationInfo = new LocationInfo(NA_SUBST, NA_SUBST, NA_SUBST, "0");
fqcn = FQCN_SUBSTITUE;
} else {
fqcn = FQCN_FLUENT;
}
ThrowableInformation ti = null;
Throwable t = event.getThrowable();
if (t != null)
ti = new ThrowableInformation(t);
if(event instanceof DefaultLoggingEvent) {
DefaultLoggingEvent defaultLoggingEvent = (DefaultLoggingEvent) event;
defaultLoggingEvent.setTimeStamp(System.currentTimeMillis());
}
org.apache.log4j.spi.LoggingEvent log4jEvent = new org.apache.log4j.spi.LoggingEvent(fqcn, logger, event.getTimeStamp(), log4jLevel, formattedMessage,
event.getThreadName(), ti, null, locationInfo, null);
return log4jEvent;
}
private Level toLog4jLevel(int slf4jLevelInt) {
Level log4jLevel;
switch (slf4jLevelInt) {
case LocationAwareLogger.TRACE_INT:
log4jLevel = Level.TRACE;
break;
case LocationAwareLogger.DEBUG_INT:
log4jLevel = Level.DEBUG;
break;
case LocationAwareLogger.INFO_INT:
log4jLevel = Level.INFO;
break;
case LocationAwareLogger.WARN_INT:
log4jLevel = Level.WARN;
break;
case LocationAwareLogger.ERROR_INT:
log4jLevel = Level.ERROR;
break;
default:
throw new IllegalStateException("Level number " + slf4jLevelInt + " is not recognized.");
}
return log4jLevel;
}
@Override
protected String getFullyQualifiedCallerName() {
return FQCN_NOMINAL;
}
}