jesmith17 commented on code in PR #3322:
URL: https://github.com/apache/logging-log4j2/pull/3322#discussion_r1899155857


##########
log4j-mongodb/src/main/java/org/apache/logging/log4j/mongodb/MongoDbProvider.java:
##########
@@ -57,12 +58,40 @@ public static class Builder<B extends Builder<B>> extends 
AbstractFilterable.Bui
         @PluginAttribute("collectionName")
         private String collectionName = null;
 
-        @PluginAttribute("datbaseName")
+        @PluginAttribute("databaseName")
         private String databaseName = null;
 
         @Override
         public MongoDbProvider build() {
-            return new MongoDbProvider(connectionStringSource, capped, 
collectionSize, databaseName, collectionName);
+            LOGGER.debug("Creating ConnectionString {}...", 
connectionStringSource);
+            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);
+                databaseName = effectiveDatabaseName;
+            } catch (final IllegalArgumentException e) {
+                LOGGER.error("Invalid MongoDB database name `{}`.", 
effectiveDatabaseName, e);
+                return null;
+            }
+            // Validate the provided collectionName property
+            try {
+                
MongoNamespace.checkCollectionNameValidity(effectiveCollectionName);
+                collectionName = effectiveCollectionName;

Review Comment:
   Good point. Done



##########
log4j-mongodb/src/main/java/org/apache/logging/log4j/mongodb/MongoDbProvider.java:
##########
@@ -57,12 +58,40 @@ public static class Builder<B extends Builder<B>> extends 
AbstractFilterable.Bui
         @PluginAttribute("collectionName")
         private String collectionName = null;
 
-        @PluginAttribute("datbaseName")
+        @PluginAttribute("databaseName")
         private String databaseName = null;
 
         @Override
         public MongoDbProvider build() {
-            return new MongoDbProvider(connectionStringSource, capped, 
collectionSize, databaseName, collectionName);
+            LOGGER.debug("Creating ConnectionString {}...", 
connectionStringSource);
+            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);
+                databaseName = effectiveDatabaseName;

Review Comment:
   Done



##########
log4j-mongodb/pom.xml:
##########
@@ -141,7 +142,11 @@
       <artifactId>junit-jupiter-api</artifactId>
       <scope>test</scope>
     </dependency>
-
+      <dependency>
+          <groupId>junit</groupId>
+          <artifactId>junit</artifactId>
+          <scope>test</scope>
+      </dependency>
   </dependencies>

Review Comment:
   Done



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