From a2af56511f07736ed73a3812c9eb1adf892077ca Mon Sep 17 00:00:00 2001
From: PJ Fanning <fanningpj@apache.org>
Date: Sun, 24 Nov 2024 19:52:24 +0000
Subject: [PATCH] PoiLogManager

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1922056 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/poi/logging/PoiLogManager.java | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/poi/src/main/java/org/apache/poi/logging/PoiLogManager.java b/poi/src/main/java/org/apache/poi/logging/PoiLogManager.java
index 78ec997cc54..a6289fc08ab 100644
--- a/poi/src/main/java/org/apache/poi/logging/PoiLogManager.java
+++ b/poi/src/main/java/org/apache/poi/logging/PoiLogManager.java
@@ -56,6 +56,27 @@ public static Logger getLogger(Class<?> clz) {
         }
     }
 
+    public static Logger getLogger(String name) {
+        try {
+            final Logger logger = LogManager.getLogger(name);
+            if (logger == null) {
+                if (shouldLog()) {
+                    System.err.println("[PoiLogManager] Log4J returned null logger. Falling back to No-Op logger.");
+                }
+                return NoOpLogger.INSTANCE;
+            }
+            return logger;
+        } catch (Throwable t) {
+            if (!ExceptionUtil.isFatal(t)) {
+                if (shouldLog()) {
+                    System.err.println("[PoiLogManager] Issue loading Log4J. Falling back to No-Op logger.");
+                    t.printStackTrace();
+                }
+            }
+            return NoOpLogger.INSTANCE;
+        }
+    }
+
     private static synchronized boolean shouldLog() {
         final long time = System.currentTimeMillis();
         if (time > LAST_TIME + SLEEP_TIME) {