Hello,
I am unable to create detached versions of existing markers when using
log4j2 through the slf4j facade - log4j2 version is 2.1.
Example:
import org.slf4j.Marker;
import org.slf4j.MarkerFactory;
public class TestMarker {
public static void main(String[] args) {
Marker markerA = MarkerFactory.getMarker("testA");
Marker markerB = MarkerFactory.getMarker("testB");
markerA.add(markerB);
Marker markerANew = MarkerFactory.getDetachedMarker("testA");
// Iteration below will fail if this line is uncommented.
//System.out.println("Removing reference from detached markerA: " +
markerANew.remove(markerB));
System.out.println("Has reference marker A: " +
markerA.hasReferences());
System.out.println("Has reference detached marker A: " +
markerANew.hasReferences());
Iterator<Marker> mRef = markerA.iterator();
while (mRef.hasNext()) {
System.out.println(mRef.next().getName());
}
mRef = markerANew.iterator();
while (mRef.hasNext()) {
System.out.println(mRef.next().getName());
}
}
}
Actual output:
Has reference marker A: true
Has reference detached marker A: true
Expected output (which I get when using native slf4j logging implementation
logback):
Has reference marker A: true
Has reference detached marker A: false
I am trying to keep my application log framework agnostic but it seems like
it's not possible in this case. Since it's currently impossible via
log4j-slf4j-impl, is there a "pure" log4j2 way of getting detached marker
instances?
The feature is quite important to us since marker names and references both
play important parts in how we route and parse our logs.
Thank you,
Regards,
/David
