Yunyung commented on code in PR #19397:
URL: https://github.com/apache/kafka/pull/19397#discussion_r2034036959


##########
clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java:
##########
@@ -620,21 +621,22 @@ private Map<String, ConfigProvider> 
instantiateConfigProviders(
             }
         }
         // Instantiate Config Providers
-        Map<String, ConfigProvider> configProviderInstances = new HashMap<>();
+        Map<String, Plugin<ConfigProvider>> configProviderPluginInstances = 
new HashMap<>();
         for (Map.Entry<String, String> entry : providerMap.entrySet()) {
             try {
                 String prefix = CONFIG_PROVIDERS_CONFIG + "." + entry.getKey() 
+ CONFIG_PROVIDERS_PARAM;
                 Map<String, ?> configProperties = 
configProviderProperties(prefix, providerConfigProperties);
                 ConfigProvider provider = Utils.newInstance(entry.getValue(), 
ConfigProvider.class);
                 provider.configure(configProperties);
-                configProviderInstances.put(entry.getKey(), provider);
+                Plugin<ConfigProvider> providerPlugin = 
Plugin.wrapInstance(provider, null, CONFIG_PROVIDERS_CONFIG);

Review Comment:
   This change is for ConfigTransformer#transform, so we need to update the 
path where the transform method is used.



##########
connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorMakerConfig.java:
##########
@@ -269,18 +270,19 @@ List<String> configProviders() {
     Map<String, String> transform(Map<String, String> props) {
         // transform worker config according to config.providers
         List<String> providerNames = configProviders();
-        Map<String, ConfigProvider> providers = new HashMap<>();
+        Map<String, Plugin<ConfigProvider>> providerPlugins = new HashMap<>();
         for (String name : providerNames) {
-            ConfigProvider configProvider = plugins.newConfigProvider(
+            Plugin<ConfigProvider> configProviderPlugin = 
plugins.newConfigProvider(
                     this,
-                    CONFIG_PROVIDERS_CONFIG + "." + name,
-                    Plugins.ClassLoaderUsage.PLUGINS
+                    name,
+                    Plugins.ClassLoaderUsage.PLUGINS,
+                    null

Review Comment:
   Ditto.



##########
clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java:
##########
@@ -587,14 +588,14 @@ private Map<String, Object> 
configProviderProperties(String configProviderPrefix
      * config.providers : A comma-separated list of names for providers.
      * config.providers.{name}.class : The Java class name for a provider.
      * config.providers.{name}.param.{param-name} : A parameter to be passed 
to the above Java class on initialization.
-     * returns a map of config provider name and its instance.
+     * returns a map of config provider name and its instance wrapped in a 
{@link org.apache.kafka.common.internals.Plugin}.
      *
      * @param indirectConfigs          The map of potential variable configs
      * @param providerConfigProperties The map of config provider configs
      * @param classNameFilter          Filter for config provider class names
-     * @return map of config provider name and its instance.
+     * @return map of config provider name and its instance wrapped in a 
{@link org.apache.kafka.common.internals.Plugin}.

Review Comment:
   Sure. I'll update it later.



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