Fix A&AI Named Query for vFW

The vFW named query has now been verified with the
A&AI simulator. Null checks were added to make the
namedQuery method work properly. In addition, a
recursive A&AI response parser was added to traverse
the response to find the correct generic-vnf object
with the target vnf-id.

For now the simulator URL is hard coded and the UUID
of the named query is hard coded. These should be
configurable in future releases.

Issue-ID: POLICY-104
Change-Id: I05a1a992ff68ca2c17fb6a578983e6b21626bf44
Signed-off-by: Daniel Cruz <dc443y@att.com>

1 files changed, 50 insertions, 14 deletions

diff --git a/controlloop/common/actors/actor.appclcm/src/main/java/org/onap/policy/controlloop/actor/appclcm/AppcLcmActorServiceProvider.java b/controlloop/common/actors/actor.appclcm/src/main/java/org/onap/policy/controlloop/actor/appclcm/AppcLcmActorServiceProvider.java
index c52a7f08e..4ffbf6941 100644
--- a/controlloop/common/actors/actor.appclcm/src/main/java/org/onap/policy/controlloop/actor/appclcm/AppcLcmActorServiceProvider.java
+++ b/controlloop/common/actors/actor.appclcm/src/main/java/org/onap/policy/controlloop/actor/appclcm/AppcLcmActorServiceProvider.java
@@ -31,8 +31,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
+import org.onap.policy.aai.AAINQF199.AAINQF199InstanceFilters;
 import org.onap.policy.aai.AAINQF199.AAINQF199InventoryResponseItem;
 import org.onap.policy.aai.AAINQF199.AAINQF199Manager;
+import org.onap.policy.aai.AAINQF199.AAINQF199NamedQuery;
+import org.onap.policy.aai.AAINQF199.AAINQF199QueryParameters;
 import org.onap.policy.aai.AAINQF199.AAINQF199Request;
 import org.onap.policy.aai.AAINQF199.AAINQF199Response;
 import org.onap.policy.appclcm.LCMCommonHeader;
@@ -91,6 +94,37 @@ public class AppcLcmActorServiceProvider implements Actor {
     public List<String> recipePayloads(String recipe) {
         return ImmutableList.copyOf(payloads.getOrDefault(recipe, Collections.emptyList()));
     }
+    
+    /**
+     * This method recursively traverses the A&AI named query response
+     * to find the generic-vnf object that contains a model-invariant-id
+     * that matches the resourceId of the policy. Once this match is found
+     * the generic-vnf object's vnf-id is returned.
+     * 
+     * @param items
+     *          the list of items related to the vnf returned by A&AI
+     * @param resourceId
+     *          the id of the target from the sdc catalog
+     *          
+     * @return the vnf-id of the target vnf to act upon or null if not found
+     */
+    private static String parseAAIResponse(List<AAINQF199InventoryResponseItem> items, String resourceId) {
+        String vnfId = null;
+        for (AAINQF199InventoryResponseItem item: items) {
+            if ((item.genericVNF != null)
+                    && (item.genericVNF.modelInvariantId != null) 
+                    && (resourceId.equals(item.genericVNF.modelInvariantId))) {
+                vnfId = item.genericVNF.vnfID;
+                break;
+            } 
+            else {
+                if((item.items != null) && (item.items.inventoryResponseItems != null)) {
+                    vnfId = parseAAIResponse(item.items.inventoryResponseItems, resourceId);
+                }
+            }
+        }
+        return vnfId;
+    }
         
     /**
      * Constructs an A&AI Named Query using a source vnf-id to determine 
@@ -105,30 +139,32 @@ public class AppcLcmActorServiceProvider implements Actor {
      * @return the target entities vnf id to act upon
      */
     public static String vnfNamedQuery(String resourceId, String sourceVnfId) {
-        String targetVnfId = "";
-        AAINQF199Request aaiRequest = new AAINQF199Request();
-        UUID requestId = UUID.randomUUID();
         
+        //TODO: This request id should not be hard coded in future releases
+        UUID requestId = UUID.fromString("a93ac487-409c-4e8c-9e5f-334ae8f99087");
+        
+        AAINQF199Request aaiRequest = new AAINQF199Request();
+        aaiRequest.queryParameters = new AAINQF199QueryParameters();
+        aaiRequest.queryParameters.namedQuery = new AAINQF199NamedQuery();
         aaiRequest.queryParameters.namedQuery.namedQueryUUID = requestId;
         
-        Map<String, Map<String, String>> filter = new HashMap<String, Map<String, String>>();
+        Map<String, Map<String, String>> filter = new HashMap<>();        
+        Map<String, String> filterItem = new HashMap<>();
         
-        Map<String, String> filterItem = new HashMap<String, String>();
         filterItem.put("vnf-id", sourceVnfId);
-        
         filter.put("generic-vnf", filterItem);
         
+        aaiRequest.instanceFilters = new AAINQF199InstanceFilters();
         aaiRequest.instanceFilters.instanceFilter.add(filter);
         
-        //TODO: What is the url to use?
-        AAINQF199Response aaiResponse = AAINQF199Manager.postQuery("http://localhost:6666", "policy", "policy", aaiRequest, requestId);
-        
+        //TODO: URL should not be hard coded for future releases
+        AAINQF199Response aaiResponse = AAINQF199Manager.postQuery(
+                        "http://localhost:6666",
+                        "policy", "policy", 
+                        aaiRequest, requestId);
+
         //TODO: What if the resourceId never matches?
-        for (AAINQF199InventoryResponseItem item: aaiResponse.inventoryResponseItems) {
-            if (item.genericVNF.modelInvariantId.equals(resourceId)) {
-                targetVnfId = item.genericVNF.vnfID;
-            }
-        }
+        String targetVnfId = parseAAIResponse(aaiResponse.inventoryResponseItems, resourceId);
         
         return targetVnfId;
     }