do not send empty storage configuration groups

jastadd-mquat-eris/src/main/java/de/tudresden/inf/st/mquat/eris/coupling/ERISConnector.java

@@ -238,10 +238,12 @@ public class ERISConnector {
 
 
     for (String path : partitionStorageConfigAttributes.keySet()) {
+
+      boolean configChanged = false;
+
       JSONArray storageConfigurationGroups = new JSONArray();
       // for each living partition
       for (List<String> accessPathList : partitionStorageConfigAttributes.get(path).keySet()) {
-        boolean configChanged = false;
         for (String attributeId : partitionStorageConfigAttributes.get(path).get(accessPathList)) {
           if (attributeId.equals(""))
             continue;
@@ -260,13 +262,18 @@ public class ERISConnector {
           }
           jsonArrayAttributes.put(attribute);
           jsonGroup.put("attributes", jsonArrayAttributes);
-          if (!jsonArrayAttributes.isEmpty() && configChanged) {
+          if (!jsonArrayAttributes.isEmpty()) {
             storageConfigurationGroups.put(jsonGroup);
           }
         }
       }
+
+
       result.put("storageConfigurationGroups", storageConfigurationGroups);
 
+      if (storageConfigurationGroups.isEmpty() || !configChanged) {
+        logger.info("Not sending empty storage configuration groups. Config changed: {},  result {}", configChanged, result);
+      } else {
         // send result
         logger.info("Sending result: {}", result);
         if (path.equals("Config/Linkage/"))
@@ -290,6 +297,9 @@ public class ERISConnector {
           logger.error("Getting living partition failed: {}", e.getMessage());
           throw new RuntimeException(e);
         }
+      }
+
+
 
     }
   }