/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.util.config;
import java.util.logging.Handler;
import java.util.logging.LogRecord;
import java.util.logging.LogManager;
import java.util.logging.ErrorManager;
import java.util.logging.SimpleFormatter;
/**
* Implements a <code>java.util.logging</code> handler that redirects logged
* messages to a Log4j Appender. This allows all the log messages to be
* collected into a single log file.
*
* <b>Configuration:</b>
* The Log4jLoggingHandler is initialized using the following LogManager
* configuration properties:
* <ul>
* <li> com.bigdata.util.config.Log4jLoggingHandler.loggername
* specifies the name of a Log4j Logger that will be used to find
* the Log4j Appenders used for actually logging the message. This
* property is optional and defaults to the log4j root logger.
* </ul>
*/
public class Log4jLoggingHandler extends Handler {
private final org.apache.log4j.Logger log4jLogger;
public Log4jLoggingHandler() {
String log4jLoggerName =
LogManager.getLogManager().getProperty
("com.bigdata.util.config.Log4jLoggingHandler.loggername");
if((log4jLoggerName != null) && !log4jLoggerName.equals("")) {
this.log4jLogger = LogUtil.getLog4jLogger(log4jLoggerName);
} else {
this.log4jLogger = LogUtil.getLog4jRootLogger();
}
// Get the handler's configuration
this.setLevel(java.util.logging.Level.FINEST);
this.setFormatter(new SimpleFormatter());
}
public void publish(LogRecord record) {
if(! isLoggable(record)) return;
String formattedMessage;
try {
formattedMessage = getFormatter().formatMessage(record);
} catch(Exception e) {
reportError(null, e, ErrorManager.FORMAT_FAILURE);
return;
}
log4jLogger.callAppenders
( new XLoggingEvent(log4jLogger, record, formattedMessage) );
}
public void close() { /* no-op */ }
public void flush() { /* no-op */ }
static class XLoggingEvent extends org.apache.log4j.spi.LoggingEvent {
private final String origLoggerName;
public XLoggingEvent(org.apache.log4j.Logger log4jLogger,
LogRecord record,
String formattedMessage)
{
super( "org.apache.log4j.Logger",
log4jLogger,
record.getMillis(),
translateLevel(record.getLevel()),
formattedMessage,
record.getThrown() );
this.origLoggerName = record.getLoggerName();
}
// Override to return the name of the java.util logger
public String getLoggerName() {
return origLoggerName;
}
protected static org.apache.log4j.Level translateLevel
(java.util.logging.Level level)
{
int lv = level.intValue();
if(lv > java.util.logging.Level.SEVERE.intValue()) {
return org.apache.log4j.Level.FATAL;
} else if(lv == java.util.logging.Level.SEVERE.intValue()) {
return org.apache.log4j.Level.ERROR;
} else if(lv >= java.util.logging.Level.WARNING.intValue()) {
return org.apache.log4j.Level.WARN;
} else if(lv >= java.util.logging.Level.INFO.intValue()) {
return org.apache.log4j.Level.INFO;
} else if(lv >= java.util.logging.Level.CONFIG.intValue()) {
return org.apache.log4j.Level.INFO;
} else if(lv >= java.util.logging.Level.FINE.intValue()) {
return org.apache.log4j.Level.DEBUG;
} else {
return org.apache.log4j.Level.TRACE;
}
}
}
}