--- a/src/goodjava/logging/Log4jFactory.java	Tue Feb 18 14:54:35 2020 -0700
+++ b/src/goodjava/logging/Log4jFactory.java	Sun Feb 23 18:14:32 2020 -0700
@@ -1,7 +1,7 @@
 package goodjava.logging;
 
 
-public final class Log4jFactory extends LoggerFactory {
+public final class Log4jFactory implements ILoggerFactory {
 	private static final class Log4jLogger implements Logger {
 		final org.apache.log4j.Logger log4j;
 
@@ -33,6 +33,10 @@
 			log4j.info(msg,t);
 		}
 
+		@Override public boolean isInfoEnabled() {
+			return log4j.isInfoEnabled();
+		}
+
 		@Override public void debug(String msg) {
 			log4j.debug(msg);
 		}
@@ -40,13 +44,13 @@
 		@Override public void debug(String msg,Throwable t) {
 			log4j.debug(msg,t);
 		}
+
+		@Override public boolean isDebugEnabled() {
+			return log4j.isDebugEnabled();
+		}
 	}
 
-	@Override protected Logger getLoggerImpl(Class cls) {
-		return new Log4jLogger(org.apache.log4j.Logger.getLogger(cls));
-	}
-
-	@Override protected Logger getLoggerImpl(String name) {
+	@Override public Logger getLogger(String name) {
 		return new Log4jLogger(org.apache.log4j.Logger.getLogger(name));
 	}
 }