Hüseyin Kartal created LOG4J2-1124:
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Summary: LogManager.getLogger()
Key: LOG4J2-1124
URL: https://issues.apache.org/jira/browse/LOG4J2-1124
Project: Log4j 2
Issue Type: Bug
Components: API
Affects Versions: 2.3
Environment: win64 java8 osgi
Reporter: Hüseyin Kartal
Fix For: 2.4
As in log4j2 api the LogManager.getLogger() call should return a logger for the
calling class.
/**
* Returns a Logger with the name of the calling class.
* @return The Logger for the calling class.
* @throws UnsupportedOperationException if the calling class cannot be
determined.
*/
public static Logger getLogger() {
return getLogger(ReflectionUtil.getCallerClass(2));
}
But in the following example the returned logger is get for the declaring
AbstractLogger class and not as assumed for the calling Classes InstanceLogger
and InstanceLogger2.
public class LogTest {
protected class AbstractLogger {
Logger logger = LogManager.getLogger();
public AbstractLogger() {
super();
logger.info("init");
}
void log(String s) {
logger.info(s);
}
}
protected class InstanceLogger extends AbstractLogger {
@Override
void log(String s) {
super.log(s);
logger.info(s);
}
}
protected class InstanceLogger2 extends AbstractLogger {
@Override
void log(String s) {
super.log(s);
logger.info(s);
}
}
@Test
public final void testLoggerInstance() {
new InstanceLogger().log("logging");
new InstanceLogger2().log("logging");
}
}
A workaround is to call LogManager.getLogger(getClass()) but i assume that in
most cases the logger for the calling class is needed so it would be nice to
change the behaviour of LogManager.getLogger().
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