KAFKA-414: External secrets in connection.uri attribute runs into validation error during connector deployment if config providers is not set on the connect worker level (#163)

Co-authored-by: Asif Mahmud <rasifmahmud16@gmail.com>

Author: jagadishmdb

src/main/java/com/mongodb/kafka/connect/MongoSinkConnector.java

@@ -81,16 +81,18 @@ public ConfigDef config() {
 
   @Override
   public Config validate(final Map<String, String> connectorConfigs) {
-    Config rawConfig = super.validate(connectorConfigs);
-
     MongoSinkConfig sinkConfig;
     try {
       sinkConfig = new MongoSinkConfig(connectorConfigs);
     } catch (Exception e) {
-      return rawConfig;
+      return super.validate(connectorConfigs);
     }
 
-    final Config config = ConfigHelper.evaluateConfigValues(rawConfig, sinkConfig);
+    final Map<String, String> resolvedConnectorConfigs =
+        ConfigHelper.evaluateConfigValues(connectorConfigs, sinkConfig);
+
+    final Config tempConfig = super.validate(resolvedConnectorConfigs);
+    final Config config = ConfigHelper.evaluateConfigValues(tempConfig, sinkConfig);
 
     validateCanConnect(sinkConfig, config, CONNECTION_URI_CONFIG)
         .ifPresent(

src/main/java/com/mongodb/kafka/connect/MongoSourceConnector.java

@@ -50,15 +50,18 @@ public Class<? extends Task> taskClass() {
 
   @Override
   public Config validate(final Map<String, String> connectorConfigs) {
-    Config rawConfig = super.validate(connectorConfigs);
     MongoSourceConfig sourceConfig;
     try {
       sourceConfig = new MongoSourceConfig(connectorConfigs);
     } catch (Exception e) {
-      return rawConfig;
+      return super.validate(connectorConfigs);
     }
 
-    final Config config = ConfigHelper.evaluateConfigValues(rawConfig, sourceConfig);
+    final Map<String, String> resolvedConnectorConfigs =
+        ConfigHelper.evaluateConfigValues(connectorConfigs, sourceConfig);
+
+    final Config tempConfig = super.validate(resolvedConnectorConfigs);
+    final Config config = ConfigHelper.evaluateConfigValues(tempConfig, sourceConfig);
 
     validateCanConnect(sourceConfig, config, MongoSourceConfig.CONNECTION_URI_CONFIG)
         .ifPresent(

src/main/java/com/mongodb/kafka/connect/util/ConfigHelper.java

@@ -17,6 +17,7 @@
 
 import static java.lang.String.format;
 
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -205,4 +206,18 @@ public static Config evaluateConfigValues(
             });
     return rawConfig;
   }
+
+  public static Map<String, String> evaluateConfigValues(
+      final Map<String, String> rawConfigs, final AbstractConfig resolvedConfig) {
+    Map<String, String> resolvedRawConfigs = new HashMap<>(rawConfigs);
+    final Map<String, Object> originals = resolvedConfig.originals();
+    rawConfigs.forEach(
+        (key, val) -> {
+          Object ev = originals.get(key);
+          if (ev instanceof String) {
+            resolvedRawConfigs.put(key, (String) ev);
+          }
+        });
+    return resolvedRawConfigs;
+  }
 }