vy commented on code in PR #2783:
URL: https://github.com/apache/logging-log4j2/pull/2783#discussion_r1708646258


##########
log4j-1.2-api/src/main/java/org/apache/log4j/xml/DOMConfigurator.java:
##########
@@ -66,20 +69,34 @@
  */
 public class DOMConfigurator {
 
+    private static boolean isFullCompatibilityEnabled() {
+        return 
PropertiesUtil.getProperties().getBooleanProperty(ConfigurationFactory.LOG4J1_EXPERIMENTAL);
+    }
+
+    private static void warnFullCompatibilityDisabled() {
+        LogLog.warn(
+                "Ignoring `DOMConfigurator` call, since `log4j1.compatibility` 
is not enabled.\n"
+                        + "See 
https://logging.staged.apache.org/log4j/2.x/migrate-from-log4j1.html#log4j1.compatibility
 for details.");
+    }

Review Comment:
   :bulb: Idea: Instead of these two methods, you could have only introduced a 
wrapper method as follows:
   
   ```
   private static void whenFullCompatibilityEnabled(ThrowingRunnable runnable) {
       // ...
   }
   ```



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