I have been playing around with Namespace hierarchies and additivity and
have come across some behaviour which does not seem right.
The following code exhibits the problem:
public void testLoggerAdditivity() {
Hierarchy h = new Hierarchy();
Logger logger1 = h.getLoggerFor("A");
logger1.setPriority(Priority.DEBUG);
Logger logger2 = h.getLoggerFor("A.B");
logger2.setPriority(Priority.DEBUG);
Logger logger3 = h.getLoggerFor("A.B.C");
logger3.setPriority(Priority.DEBUG);
final String pattern =
"%7.7{priority} %5.5{time} [%8.8{category}] "
+ "(%{context}): %{message}\\n%{throwable}";
final PatternFormatter formatter = new PatternFormatter(pattern);
File file1 = new File("LKAdd1.txt");
try {
FileTarget target1 = new FileTarget(file1, false, formatter);
PriorityFilter filter = new PriorityFilter(Priority.ERROR);
//Set log targets of logger
logger1.setLogTargets(new LogTarget[] { target1, filter });
logger1.setAdditivity(true);
File file2 = new File("LKAdd2.txt");
FileTarget target2 = new FileTarget(file2, false, formatter);
logger2.setLogTargets(new LogTarget[] { target2, filter });
}
catch (IOException ioe) {
}
logger2.setAdditivity(true);
logger3.setAdditivity(true);
logger1.info("Additivity Message1");
logger2.info("Additivity Message2");
logger3.info("Additivity Message3");
}
Having setup a 3 level hierarchy, I attach targets to levels 1 and 2 (but
not 3). However the results written to the files LKAdd1.txt are:
INFO 10087 [A ] (): Additivity Message1
INFO 10087 [A.B ] (): Additivity Message2
and the results written to LKAdd2.txt are:
INFO 10087 [A.B ] (): Additivity Message2
INFO 10087 [A.B.C ] (): Additivity Message3
I would have assumed that the text logged to logger3 would also appear in
the target attached to logger1.
It is prevented from doing so by the following chunk of code in the log
method of class Logger:
if( m_logTargetsForceSet && m_additivity && null != m_parent )
{
m_parent.output( event );
}
m_logTargetsForceSet is only set when a target is added but as logger3
uses the inherited handler and not one of its own, it only logs to
LKAdd2.txt and refuses to log to any parent targets.
I could not find any description as to how additivity is actually handled
so is this a defect?
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