jesmith17 commented on code in PR #3467:
URL: https://github.com/apache/logging-log4j2/pull/3467#discussion_r1958828058


##########
log4j-mongodb4/src/main/java/org/apache/logging/log4j/mongodb4/MongoDb4Provider.java:
##########
@@ -60,14 +61,47 @@ public static class Builder<B extends Builder<B>> extends 
AbstractFilterable.Bui
         @PluginBuilderAttribute("capped")
         private boolean capped = false;
 
+        @PluginBuilderAttribute("collectionName")
+        private String collectionName;
+
+        @PluginBuilderAttribute("databaseName")
+        private String databaseName;
+
+
+
         @Override
         public MongoDb4Provider build() {
             StatusLogger.getLogger().warn("The {} Appender is deprecated, use 
the MongoDb Appender.", PLUGIN_NAME);
+
+            ConnectionString connectionString;
+            try {
+                connectionString = new 
ConnectionString(connectionStringSource);
+            } catch (final IllegalArgumentException e) {
+                LOGGER.error("Invalid MongoDB connection string `{}`.", 
connectionStringSource, e);
+                return null;
+            }
+
+            String effectiveDatabaseName = databaseName != null ? databaseName 
: connectionString.getDatabase();
+            String effectiveCollectionName = collectionName != null ? 
collectionName : connectionString.getCollection();
+            // Validate the provided databaseName property
+            try {
+                
MongoNamespace.checkDatabaseNameValidity(effectiveDatabaseName);
+            } catch (final IllegalArgumentException e) {
+                LOGGER.error("Invalid MongoDB database name `{}`.", 
effectiveDatabaseName, e);
+                return null;
+            }
+            // Validate the provided collectionName property
+            try {
+                
MongoNamespace.checkCollectionNameValidity(effectiveCollectionName);
+            } catch (final IllegalArgumentException e) {
+                LOGGER.error("Invalid MongoDB collection name `{}`.", 
effectiveCollectionName, e);
+                return null;
+            }

Review Comment:
   When I made these changes to the main branch, was specifically asked to make 
them to the build method. So making these change in this format keep the 
approach in line with the same code changes in the main branch.  It seems odd 
to want to solve the same challenge in 2 different ways across the branches. 



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