Added support for VF Module Delete recipe

Enhanced SOActorServiceProvider to support VF Module Delete Recipe.
Added SOOperationType enum to map the policy recipe with the SO API that
we want to call for a recipe. vf module id from non-base vf module is
used to construct the delete request url and same will be deleted.

Updated SOManager so that it sends request to SO based on the
SOOperationType enum value.

Enhanced RESTManager to add support for the http delete using new class
HttpDeleteWithBody (to allow pass the payload to the SO delete VF module API).

Change-Id: I15b678ed9ebc85dfa7cb62bbf23e41c0fe6e4c69
Issue-ID: POLICY-1079
Signed-off-by: Piyush Garg <piyush.garg1@amdocs.com>

18 files changed, 728 insertions, 365 deletions

diff --git a/controlloop/common/actors/actor.so/src/main/java/org/onap/policy/controlloop/actor/so/SOActorServiceProvider.java b/controlloop/common/actors/actor.so/src/main/java/org/onap/policy/controlloop/actor/so/SOActorServiceProvider.java
index 602bc284b..ce49dda46 100644
--- a/controlloop/common/actors/actor.so/src/main/java/org/onap/policy/controlloop/actor/so/SOActorServiceProvider.java
+++ b/controlloop/common/actors/actor.so/src/main/java/org/onap/policy/controlloop/actor/so/SOActorServiceProvider.java
@@ -36,15 +36,7 @@ import org.onap.policy.controlloop.ControlLoopOperation;
 import org.onap.policy.controlloop.VirtualControlLoopEvent;
 import org.onap.policy.controlloop.actorserviceprovider.spi.Actor;
 import org.onap.policy.controlloop.policy.Policy;
-import org.onap.policy.so.SOCloudConfiguration;
-import org.onap.policy.so.SOManager;
-import org.onap.policy.so.SOModelInfo;
-import org.onap.policy.so.SORelatedInstance;
-import org.onap.policy.so.SORelatedInstanceListElement;
-import org.onap.policy.so.SORequest;
-import org.onap.policy.so.SORequestDetails;
-import org.onap.policy.so.SORequestInfo;
-import org.onap.policy.so.SORequestParameters;
+import org.onap.policy.so.*;
 import org.onap.policy.so.util.Serialization;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -60,10 +52,13 @@ public class SOActorServiceProvider implements Actor {
 
     // Strings for recipes
     private static final String RECIPE_VF_MODULE_CREATE = "VF Module Create";
+    private static final String RECIPE_VF_MODULE_DELETE = "VF Module Delete";
 
-    private static final ImmutableList<String> recipes = ImmutableList.of(RECIPE_VF_MODULE_CREATE);
+    private static final ImmutableList<String> recipes = ImmutableList.of(RECIPE_VF_MODULE_CREATE,
+            RECIPE_VF_MODULE_DELETE);
     private static final ImmutableMap<String, List<String>> targets = new ImmutableMap.Builder<String, List<String>>()
-                    .put(RECIPE_VF_MODULE_CREATE, ImmutableList.of(TARGET_VFC)).build();
+                    .put(RECIPE_VF_MODULE_CREATE, ImmutableList.of(TARGET_VFC))
+                    .put(RECIPE_VF_MODULE_DELETE, ImmutableList.of(TARGET_VFC)).build();
 
     // name of request parameters within policy payload
     public static final String REQ_PARAM_NM = "requestParameters";
@@ -71,14 +66,19 @@ public class SOActorServiceProvider implements Actor {
     // name of configuration parameters within policy payload
     public static final String CONFIG_PARAM_NM = "configurationParameters";
 
+    private static final String MODEL_NAME_PROPERTY_KEY = "model-ver.model-name";
+    private static final String MODEL_VERSION_PROPERTY_KEY = "model-ver.model-version";
+    private static final String MODEL_VERSION_ID_PROPERTY_KEY = "model-ver.model-version-id";
+
     // used to decode configuration parameters via gson
-    public static Type CONFIG_TYPE = new TypeToken<List<Map<String, String>>>() {}.getType();
+    private static final Type CONFIG_TYPE = new TypeToken<List<Map<String, String>>>() {}.getType();
 
-    // Static variables required to hold the IDs of the last service item and VNF item.
+    // Static variables required to hold the IDs of the last service item, VNF item and VF Module.
     // Note that in
     // a multithreaded deployment this WILL break
     private static String lastVNFItemVnfId;
     private static String lastServiceItemServiceInstanceId;
+    private static String lastVfModuleItemVfModuleInstanceId;
 
     @Override
     public String actor() {
@@ -114,17 +114,11 @@ public class SOActorServiceProvider implements Actor {
      */
     public SORequest constructRequest(VirtualControlLoopEvent onset, ControlLoopOperation operation, Policy policy,
                     AaiNqResponseWrapper aaiResponseWrapper) {
-        String modelNamePropertyKey = "model-ver.model-name";
-        String modelVersionPropertyKey = "model-ver.model-version";
-        String modelVersionIdPropertyKey = "model-ver.model-version-id";
-
-
-        if (!SO_ACTOR.equals(policy.getActor()) || !RECIPE_VF_MODULE_CREATE.equals(policy.getRecipe())) {
-            // for future extension
+        if (!SO_ACTOR.equals(policy.getActor()) || !recipes().contains(policy.getRecipe())) {
             return null;
         }
 
-        // Perform named query request and handle response
+        // A&AI named query should have been performed by now. If not, return null
         if (aaiResponseWrapper == null) {
             return null;
         }
@@ -170,56 +164,51 @@ public class SOActorServiceProvider implements Actor {
             return null;
         }
 
+        // Construct SO Request for a policy's recipe
+        if (RECIPE_VF_MODULE_CREATE.equals(policy.getRecipe())) {
+            return constructCreateRequest(aaiResponseWrapper, policy, tenantItem, vnfItem, vnfServiceItem);
+        } else if (RECIPE_VF_MODULE_DELETE.equals(policy.getRecipe())) {
+            return constructDeleteRequest(aaiResponseWrapper, tenantItem, vnfItem, vnfServiceItem);
+        } else {
+            return null;
+        }
+    }
 
-        // Construct SO Request
+    /**
+     * Construct SO request to create vf-module
+     *
+     * @param aaiResponseWrapper the AAI response containing the VF modules
+     * @param policy             the policy
+     * @param tenantItem         tenant item from A&AI named-query response
+     * @param vnfItem            vnf item from A&AI named-query response
+     * @param vnfServiceItem     vnf service item from A&AI named-query response
+     * @return SO create vf-module request
+     */
+    private SORequest constructCreateRequest(AaiNqResponseWrapper aaiResponseWrapper, Policy policy, AaiNqInventoryResponseItem
+            tenantItem, AaiNqInventoryResponseItem vnfItem, AaiNqInventoryResponseItem vnfServiceItem) {
+        AaiNqInventoryResponseItem vfModuleItem = findVfModule(aaiResponseWrapper, false);
         SORequest request = new SORequest();
+        request.setOperationType(SoOperationType.SCALE_OUT);
+        //
         //
         // Do NOT send So the requestId, they do not support this field
         //
         request.setRequestDetails(new SORequestDetails());
-        request.getRequestDetails().setModelInfo(new SOModelInfo());
-        request.getRequestDetails().setCloudConfiguration(new SOCloudConfiguration());
-        request.getRequestDetails().setRequestInfo(new SORequestInfo());
         request.getRequestDetails().setRequestParameters(new SORequestParameters());
         request.getRequestDetails().getRequestParameters().setUserParams(null);
 
-        //
         // cloudConfiguration
-        //
-        request.getRequestDetails().getCloudConfiguration().setTenantId(tenantItem.getTenant().getTenantId());
-        request.getRequestDetails().getCloudConfiguration().setLcpCloudRegionId(
-                        tenantItem.getItems().getInventoryResponseItems().get(0).getCloudRegion().getCloudRegionId());
-
-        //
+        request.getRequestDetails().setCloudConfiguration(constructCloudConfiguration(tenantItem));
         // modelInfo
-        //
-        request.getRequestDetails().getModelInfo().setModelType("vfModule");
-        request.getRequestDetails().getModelInfo()
-                        .setModelInvariantId(vfModuleItem.getVfModule().getModelInvariantId());
+        request.getRequestDetails().setModelInfo(constructVfModuleModelInfo(vfModuleItem));
         request.getRequestDetails().getModelInfo().setModelVersionId(vfModuleItem.getVfModule().getModelVersionId());
-        request.getRequestDetails().getModelInfo()
-                        .setModelCustomizationId(vfModuleItem.getVfModule().getModelCustomizationId());
 
-        for (AaiNqExtraProperty prop : vfModuleItem.getExtraProperties().getExtraProperty()) {
-            if (prop.getPropertyName().equals(modelNamePropertyKey)) {
-                request.getRequestDetails().getModelInfo().setModelName(prop.getPropertyValue());
-            } else if (prop.getPropertyName().equals(modelVersionPropertyKey)) {
-                request.getRequestDetails().getModelInfo().setModelVersion(prop.getPropertyValue());
-            }
-        }
-
-        //
         // requestInfo
-        //
+        request.getRequestDetails().setRequestInfo(constructRequestInfo());
         String vfModuleName = aaiResponseWrapper.genVfModuleName();
         request.getRequestDetails().getRequestInfo().setInstanceName(vfModuleName);
-        request.getRequestDetails().getRequestInfo().setSource("POLICY");
-        request.getRequestDetails().getRequestInfo().setSuppressRollback(false);
-        request.getRequestDetails().getRequestInfo().setRequestorId("policy");
 
-        //
         // relatedInstanceList
-        //
         SORelatedInstanceListElement relatedInstanceListElement0 = new SORelatedInstanceListElement();
         SORelatedInstanceListElement relatedInstanceListElement1 = new SORelatedInstanceListElement();
         SORelatedInstanceListElement relatedInstanceListElement2 = new SORelatedInstanceListElement();
@@ -235,20 +224,20 @@ public class SOActorServiceProvider implements Actor {
 
         // Service Item
         relatedInstanceListElement1.getRelatedInstance()
-                        .setInstanceId(vnfServiceItem.getServiceInstance().getServiceInstanceId());
+                .setInstanceId(vnfServiceItem.getServiceInstance().getServiceInstanceId());
         relatedInstanceListElement1.getRelatedInstance().setModelInfo(new SOModelInfo());
         relatedInstanceListElement1.getRelatedInstance().getModelInfo().setModelType("service");
         relatedInstanceListElement1.getRelatedInstance().getModelInfo()
-                        .setModelInvariantId(vnfServiceItem.getServiceInstance().getModelInvariantId());
+                .setModelInvariantId(vnfServiceItem.getServiceInstance().getModelInvariantId());
         for (AaiNqExtraProperty prop : vnfServiceItem.getExtraProperties().getExtraProperty()) {
-            if (prop.getPropertyName().equals(modelNamePropertyKey)) {
+            if (prop.getPropertyName().equals(MODEL_NAME_PROPERTY_KEY)) {
                 relatedInstanceListElement1.getRelatedInstance().getModelInfo().setModelName(prop.getPropertyValue());
-            } else if (prop.getPropertyName().equals(modelVersionPropertyKey)) {
+            } else if (prop.getPropertyName().equals(MODEL_VERSION_PROPERTY_KEY)) {
                 relatedInstanceListElement1.getRelatedInstance().getModelInfo()
-                                .setModelVersion(prop.getPropertyValue());
-            } else if (prop.getPropertyName().equals(modelVersionIdPropertyKey)) {
+                        .setModelVersion(prop.getPropertyValue());
+            } else if (prop.getPropertyName().equals(MODEL_VERSION_ID_PROPERTY_KEY)) {
                 relatedInstanceListElement1.getRelatedInstance().getModelInfo()
-                                .setModelVersionId(prop.getPropertyValue());
+                        .setModelVersionId(prop.getPropertyValue());
             }
         }
 
@@ -257,23 +246,23 @@ public class SOActorServiceProvider implements Actor {
         relatedInstanceListElement2.getRelatedInstance().setModelInfo(new SOModelInfo());
         relatedInstanceListElement2.getRelatedInstance().getModelInfo().setModelType("vnf");
         relatedInstanceListElement2.getRelatedInstance().getModelInfo()
-                        .setModelInvariantId(vnfItem.getGenericVnf().getModelInvariantId());
+                .setModelInvariantId(vnfItem.getGenericVnf().getModelInvariantId());
         for (AaiNqExtraProperty prop : vnfItem.getExtraProperties().getExtraProperty()) {
-            if (prop.getPropertyName().equals(modelNamePropertyKey)) {
+            if (prop.getPropertyName().equals(MODEL_NAME_PROPERTY_KEY)) {
                 relatedInstanceListElement2.getRelatedInstance().getModelInfo().setModelName(prop.getPropertyValue());
-            } else if (prop.getPropertyName().equals(modelVersionPropertyKey)) {
+            } else if (prop.getPropertyName().equals(MODEL_VERSION_PROPERTY_KEY)) {
                 relatedInstanceListElement2.getRelatedInstance().getModelInfo()
-                                .setModelVersion(prop.getPropertyValue());
-            } else if (prop.getPropertyName().equals(modelVersionIdPropertyKey)) {
+                        .setModelVersion(prop.getPropertyValue());
+            } else if (prop.getPropertyName().equals(MODEL_VERSION_ID_PROPERTY_KEY)) {
                 relatedInstanceListElement2.getRelatedInstance().getModelInfo()
-                                .setModelVersionId(prop.getPropertyValue());
+                        .setModelVersionId(prop.getPropertyValue());
             }
         }
         relatedInstanceListElement2.getRelatedInstance().getModelInfo()
-                        .setModelCustomizationName(vnfItem.getGenericVnf().getVnfType()
-                                        .substring(vnfItem.getGenericVnf().getVnfType().lastIndexOf('/') + 1));
+                .setModelCustomizationName(vnfItem.getGenericVnf().getVnfType()
+                        .substring(vnfItem.getGenericVnf().getVnfType().lastIndexOf('/') + 1));
         relatedInstanceListElement2.getRelatedInstance().getModelInfo()
-                        .setModelCustomizationId(vnfItem.getGenericVnf().getModelCustomizationId());
+                .setModelCustomizationId(vnfItem.getGenericVnf().getModelCustomizationId());
 
         // Insert the Service Item and VNF Item
         request.getRequestDetails().getRelatedInstanceList().add(relatedInstanceListElement0);
@@ -285,19 +274,102 @@ public class SOActorServiceProvider implements Actor {
 
         // Configuration Parameters
         request.getRequestDetails().setConfigurationParameters(buildConfigurationParameters(policy));
-
         // Save the instance IDs for the VNF and service to static fields
-        preserveInstanceIds(vnfItem.getGenericVnf().getVnfId(),
-                        vnfServiceItem.getServiceInstance().getServiceInstanceId());
-
+        // vfModuleId is not required for the create vf-module
+        preserveInstanceIds(vnfItem.getGenericVnf().getVnfId(), vnfServiceItem.getServiceInstance()
+                .getServiceInstanceId(), null);
         if (logger.isDebugEnabled()) {
-            logger.debug("SO request sent: {}", Serialization.gsonPretty.toJson(request));
+            logger.debug("Constructed SO request: {}", Serialization.gsonPretty.toJson(request));
         }
+        return request;
+    }
+
+    /**
+     * Construct SO request to delete vf-module
+     *
+     * @param aaiResponseWrapper the AAI response containing the VF modules
+     * @param tenantItem         tenant item from A&AI named-query response
+     * @param vnfItem            vnf item from A&AI named-query response
+     * @param vnfServiceItem     vnf service item from A&AI named-query response
+     * @return SO delete vf-module request
+     */
+    private SORequest constructDeleteRequest(AaiNqResponseWrapper aaiResponseWrapper, AaiNqInventoryResponseItem
+            tenantItem, AaiNqInventoryResponseItem vnfItem, AaiNqInventoryResponseItem vnfServiceItem) {
+        // find the last non-base vf-module to delete
+        AaiNqInventoryResponseItem vfModuleItem = findVfModuleToDelete(aaiResponseWrapper);
 
+        SORequest request = new SORequest();
+        request.setOperationType(SoOperationType.DELETE_VF_MODULE);
+        request.setRequestDetails(new SORequestDetails());
+        request.getRequestDetails().setRelatedInstanceList(null);
+        request.getRequestDetails().setConfigurationParameters(null);
+
+        // cloudConfiguration
+        request.getRequestDetails().setCloudConfiguration(constructCloudConfiguration(tenantItem));
+        // modelInfo
+        request.getRequestDetails().setModelInfo(constructVfModuleModelInfo(vfModuleItem));
+        // requestInfo
+        request.getRequestDetails().setRequestInfo(constructRequestInfo());
+        // Save the instance IDs for the VNF, service and vfModule to static fields
+        preserveInstanceIds(vnfItem.getGenericVnf().getVnfId(), vnfServiceItem.getServiceInstance()
+                .getServiceInstanceId(), vfModuleItem.getVfModule().getVfModuleId());
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Constructed SO request: {}", Serialization.gsonPretty.toJson(request));
+        }
         return request;
     }
 
     /**
+     * construct requestInfo for the SO requestDetails
+     *
+     * @return SO request information
+     */
+    private SORequestInfo constructRequestInfo() {
+        SORequestInfo soRequestInfo = new SORequestInfo();
+        soRequestInfo.setSource("POLICY");
+        soRequestInfo.setSuppressRollback(false);
+        soRequestInfo.setRequestorId("policy");
+        return soRequestInfo;
+    }
+
+    /**
+     * construct modelInfo of the vfModule for the SO requestDetails
+     *
+     * @param vfModuleItem vf module item from A&AI named-query response
+     * @return SO Model info for the vfModule
+     */
+    private SOModelInfo constructVfModuleModelInfo(AaiNqInventoryResponseItem vfModuleItem) {
+        SOModelInfo soModelInfo = new SOModelInfo();
+        soModelInfo.setModelType("vfModule");
+        soModelInfo.setModelInvariantId(vfModuleItem.getVfModule().getModelInvariantId());
+        soModelInfo.setModelCustomizationId(vfModuleItem.getVfModule().getModelCustomizationId());
+
+        for (AaiNqExtraProperty prop : vfModuleItem.getExtraProperties().getExtraProperty()) {
+            if (prop.getPropertyName().equals(MODEL_NAME_PROPERTY_KEY)) {
+                soModelInfo.setModelName(prop.getPropertyValue());
+            } else if (prop.getPropertyName().equals(MODEL_VERSION_PROPERTY_KEY)) {
+                soModelInfo.setModelVersion(prop.getPropertyValue());
+            }
+        }
+        return soModelInfo;
+    }
+
+    /**
+     * construct cloudConfiguration for the SO requestDetails
+     *
+     * @param tenantItem tenant item from A&AI named-query response
+     * @return SO cloud configuration
+     */
+    private SOCloudConfiguration constructCloudConfiguration(AaiNqInventoryResponseItem tenantItem) {
+        SOCloudConfiguration cloudConfiguration = new SOCloudConfiguration();
+        cloudConfiguration.setTenantId(tenantItem.getTenant().getTenantId());
+        cloudConfiguration.setLcpCloudRegionId(tenantItem.getItems().getInventoryResponseItems().get(0)
+                .getCloudRegion().getCloudRegionId());
+        return cloudConfiguration;
+    }
+
+    /**
      * This method is needed to get the serviceInstanceId and vnfInstanceId which is used
      * in the asyncSORestCall.
      *
@@ -308,7 +380,7 @@ public class SOActorServiceProvider implements Actor {
     public static void sendRequest(String requestId, WorkingMemory wm, Object request) {
         SOManager soManager = new SOManager();
         soManager.asyncSORestCall(requestId, wm, lastServiceItemServiceInstanceId, lastVNFItemVnfId,
-                        (SORequest) request);
+                lastVfModuleItemVfModuleInstanceId, (SORequest) request);
     }
 
     /**
@@ -325,6 +397,18 @@ public class SOActorServiceProvider implements Actor {
     }
 
     /**
+     * Find the VF module item to delete from AAI response.
+     *
+     * @param aaiResponseWrapper the AAI response containing the VF modules
+     * @return VF module item to delete or null if the non-base vfModule was not found
+     */
+    private AaiNqInventoryResponseItem findVfModuleToDelete(AaiNqResponseWrapper aaiResponseWrapper) {
+        List<AaiNqInventoryResponseItem> lst = aaiResponseWrapper.getVfModuleItems(false);
+        return (lst == null || lst.isEmpty() ? null : lst.get(lst.size() - 1));
+    }
+
+
+    /**
      * Builds the request parameters from the policy payload.
      *
      * @param policy the policy
@@ -364,14 +448,16 @@ public class SOActorServiceProvider implements Actor {
     }
 
     /**
-     * This method is called to remember the last service instance ID and VNF Item VNF ID.
+     * This method is called to remember the last service instance ID, VNF Item VNF ID and vf module ID.
      * Note these fields are static, beware for multithreaded deployments
      *
      * @param vnfInstanceId update the last VNF instance ID to this value
      * @param serviceInstanceId update the last service instance ID to this value
+     * @param vfModuleId update the vfModule instance ID to this value
      */
-    private static void preserveInstanceIds(final String vnfInstanceId, final String serviceInstanceId) {
+    private static void preserveInstanceIds(final String vnfInstanceId, final String serviceInstanceId, final String vfModuleId) {
         lastVNFItemVnfId = vnfInstanceId;
         lastServiceItemServiceInstanceId = serviceInstanceId;
+        lastVfModuleItemVfModuleInstanceId = vfModuleId;
     }
 }
diff --git a/controlloop/common/actors/actor.so/src/test/java/org/onap/policy/controlloop/actor/so/SoActorServiceProviderTest.java b/controlloop/common/actors/actor.so/src/test/java/org/onap/policy/controlloop/actor/so/SoActorServiceProviderTest.java
index fcc55ead3..6de451d0c 100644
--- a/controlloop/common/actors/actor.so/src/test/java/org/onap/policy/controlloop/actor/so/SoActorServiceProviderTest.java
+++ b/controlloop/common/actors/actor.so/src/test/java/org/onap/policy/controlloop/actor/so/SoActorServiceProviderTest.java
@@ -42,6 +42,7 @@ import org.onap.policy.controlloop.VirtualControlLoopEvent;
 import org.onap.policy.controlloop.policy.Policy;
 import org.onap.policy.so.SORequest;
 import org.onap.policy.so.SORequestParameters;
+import org.onap.policy.so.SoOperationType;
 import org.onap.policy.so.util.Serialization;
 
 public class SoActorServiceProviderTest {
@@ -92,6 +93,11 @@ public class SoActorServiceProviderTest {
         // response has no non-base VF modules (other than the "dummy")
         assertNull(new SOActorServiceProvider().constructRequest(onset, operation, policy,
                         loadAaiResponse(onset, "aai/AaiNqResponse-NoNonBase.json")));
+
+        policy.setRecipe("VF Module Delete");
+        SORequest deleteRequest = new SOActorServiceProvider().constructRequest(onset, operation, policy, aaiNqResp);
+        assertNotNull(deleteRequest);
+        assertEquals(SoOperationType.DELETE_VF_MODULE, deleteRequest.getOperationType());
     }
 
     @Test
@@ -108,8 +114,9 @@ public class SoActorServiceProviderTest {
         SOActorServiceProvider sp = new SOActorServiceProvider();
 
         assertEquals("SO", sp.actor());
-        assertEquals(1, sp.recipes().size());
+        assertEquals(2, sp.recipes().size());
         assertEquals("VF Module Create", sp.recipes().get(0));
+        assertEquals("VF Module Delete", sp.recipes().get(1));
         assertEquals(0, sp.recipePayloads("VF Module Create").size());
     }
 
diff --git a/controlloop/common/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java b/controlloop/common/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java
index 56f79d378..b54981d22 100644
--- a/controlloop/common/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java
+++ b/controlloop/common/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java
@@ -88,13 +88,13 @@ public final class AaiManager {
             return null;
         }
 
-        int httpResponseCode = httpDetails.a;
+        int httpResponseCode = httpDetails.first;
 
         logger.info(url);
         logger.info("{}", httpResponseCode);
-        logger.info(httpDetails.b);
+        logger.info(httpDetails.second);
 
-        if (httpDetails.b != null) {
+        if (httpDetails.second != null) {
             return composeResponse(httpDetails, url, AaiNqResponse.class);
         }
         return null;
@@ -174,11 +174,11 @@ public final class AaiManager {
                 return null;
             }
 
-            int httpResponseCode = httpDetailsGet.a;
+            int httpResponseCode = httpDetailsGet.first;
 
             logger.info(urlGet);
             logger.info("{}", httpResponseCode);
-            logger.info(httpDetailsGet.b);
+            logger.info(httpDetailsGet.second);
 
             if (httpResponseCode == 200) {
                 T responseGet = composeResponse(httpDetailsGet, urlGet, classOfResponse);
@@ -226,8 +226,8 @@ public final class AaiManager {
     private <T> T composeResponse(final Pair<Integer, String> httpDetails, final String url,
             final Class<T> classOfResponse) {
         try {
-            T response = Serialization.gsonPretty.fromJson(httpDetails.b, classOfResponse);
-            netLogger.info("[IN|{}|{}|]{}{}", "AAI", url, LINE_SEPARATOR, httpDetails.b);
+            T response = Serialization.gsonPretty.fromJson(httpDetails.second, classOfResponse);
+            netLogger.info("[IN|{}|{}|]{}{}", "AAI", url, LINE_SEPARATOR, httpDetails.second);
             return response;
         } catch (JsonSyntaxException e) {
             logger.error("postQuery threw: ", e);
diff --git a/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/HttpDeleteWithBody.java b/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/HttpDeleteWithBody.java
new file mode 100644
index 000000000..262872262
--- /dev/null
+++ b/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/HttpDeleteWithBody.java
@@ -0,0 +1,52 @@
+/*
+ * ============LICENSE_START=======================================================
+ * rest
+ * ================================================================================
+ * Copyright (C) 2018 Amdocs. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.rest;
+
+import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
+
+import java.net.URI;
+
+
+/**
+ * Allows for HTTP DELETE requests to contain a body, which the HttpDelete
+ * class does not support.
+ */
+public class HttpDeleteWithBody extends HttpEntityEnclosingRequestBase {
+    public static final String METHOD_NAME = "DELETE";
+
+    public String getMethod() {
+        return METHOD_NAME;
+    }
+
+    public HttpDeleteWithBody(final String uri) {
+        super();
+        setURI(URI.create(uri));
+    }
+
+    public HttpDeleteWithBody(final URI uri) {
+        super();
+        setURI(uri);
+    }
+
+    public HttpDeleteWithBody() {
+        super();
+    }
+}
diff --git a/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java b/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java
index 39e0d8a7f..a7e373b5f 100644
--- a/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java
+++ b/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -20,15 +20,16 @@
 
 package org.onap.policy.rest;
 
-import java.io.IOException;
 import java.nio.charset.Charset;
 import java.util.Map;
 import java.util.Map.Entry;
 import javax.xml.bind.DatatypeConverter;
+
 import org.apache.http.HttpHeaders;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpRequestBase;
 import org.apache.http.conn.ssl.NoopHostnameVerifier;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.CloseableHttpClient;
@@ -42,126 +43,141 @@ public class RESTManager {
     private static final Logger logger = LoggerFactory.getLogger(RESTManager.class);
 
     public class Pair<A, B> {
-        public final A a;
-        public final B b;
+        public final A first;
+        public final B second;
 
-        public Pair(A a, B b) {
-            this.a = a;
-            this.b = b;
+        public Pair(A first, B second) {
+            this.first = first;
+            this.second = second;
         }
     }
 
     /**
      * Perform REST Post.
-     * 
-     * @param url the url
-     * @param username the user name
-     * @param password the password
-     * @param headers any headers
+     *
+     * @param url         the url
+     * @param username    the user name
+     * @param password    the password
+     * @param headers     any headers
      * @param contentType what the content type is
-     * @param body body to send
+     * @param body        body to send
      * @return the response status code and the body
      */
     public Pair<Integer, String> post(String url, String username, String password,
-            Map<String, String> headers, String contentType, String body) {
-
-        String authHeader = makeAuthHeader(username, password);
-
-        logger.debug("HTTP REQUEST: {} -> {} {} -> {}", url, username,
-                ((password != null) ? password.length() : "-"), contentType);
-        if (headers != null) {
-            logger.debug("Headers: ");
-            headers.forEach((name, value) -> logger.debug("{} -> {}", name, value));
+                                      Map<String, String> headers, String contentType, String body) {
+        HttpPost post = new HttpPost(url);
+        addHeaders(post, username, password, headers);
+        post.addHeader("Content-Type", contentType);
+        try {
+            StringEntity input = new StringEntity(body);
+            input.setContentType(contentType);
+            post.setEntity(input);
+        } catch (Exception e) {
+            logger.error("post threw: ", e);
+            return null;
         }
-        logger.debug(body);
+        return sendRequest(post);
+    }
 
-        try (CloseableHttpClient client =
-                HttpClientBuilder
-                        .create()
-                        .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
-                        .build()) {
-
-            HttpPost post = new HttpPost(url);
-            if (headers != null) {
-                for (Entry<String, String> entry : headers.entrySet()) {
-                    post.addHeader(entry.getKey(), headers.get(entry.getKey()));
-                }
-            }
-            post.addHeader("Content-Type", contentType);            
-            if (authHeader != null) {
-                post.setHeader(HttpHeaders.AUTHORIZATION, authHeader);
+    /**
+     * Do a REST get.
+     *
+     * @param url      URL
+     * @param username user name
+     * @param password password
+     * @param headers  any headers to add
+     * @return a Pair for the response status and the body
+     */
+    public Pair<Integer, String> get(String url, String username, String password,
+                                     Map<String, String> headers) {
+        HttpGet get = new HttpGet(url);
+        addHeaders(get, username, password, headers);
+        return sendRequest(get);
+    }
+
+    /**
+     * Perform REST Delete.
+     *
+     * @param url         the url
+     * @param username    the user name
+     * @param password    the password
+     * @param headers     any headers
+     * @param contentType what the content type is
+     * @param body        body (optional) to send
+     * @return the response status code and the body
+     */
+    public Pair<Integer, String> delete(String url, String username, String password, Map<String, String> headers,
+                                        String contentType, String body) {
+        HttpDeleteWithBody delete = new HttpDeleteWithBody(url);
+        addHeaders(delete, username, password, headers);
+        delete.addHeader("Content-Type", contentType);
+        if (body != null && !body.isEmpty()) {
+            try {
+                StringEntity input = new StringEntity(body);
+                input.setContentType(contentType);
+                delete.setEntity(input);
+            } catch (Exception e) {
+                logger.error("delete threw: ", e);
+                return null;
             }
+        }
+        return sendRequest(delete);
+    }
 
-            StringEntity input = new StringEntity(body);
-            input.setContentType(contentType);
-            post.setEntity(input);
+    /**
+     * Send REST request.
+     *
+     * @param request http request to send
+     * @return the response status code and the body
+     */
+    private Pair<Integer, String> sendRequest(HttpRequestBase request) {
+        if (logger.isDebugEnabled()) {
+            logger.debug("***** sendRequest to url {}:", request.getURI());
+        }
 
-            HttpResponse response = client.execute(post);
+        try (CloseableHttpClient client =
+                     HttpClientBuilder
+                             .create()
+                             .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
+                             .build()) {
+            HttpResponse response = client.execute(request);
             if (response != null) {
                 String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
-                logger.debug("HTTP POST Response Status Code: {}",
+                logger.debug("HTTP Response Status Code: {}",
                         response.getStatusLine().getStatusCode());
-                logger.debug("HTTP POST Response Body:");
+                logger.debug("HTTP Response Body:");
                 logger.debug(returnBody);
 
                 return new Pair<>(response.getStatusLine().getStatusCode(),
                         returnBody);
-            }
-            else {
-                logger.error("Response from {} is null", url);
+            } else {
+                logger.error("Response from {} is null", request.getURI());
                 return null;
             }
-        }
-        catch (Exception e) {
-            logger.error("Failed to POST to {}", url, e);
+        } catch (Exception e) {
+            logger.error("Request failed to {}", request.getURI(), e);
             return null;
         }
     }
 
     /**
-     * Do a REST get.
-     * 
-     * @param url URL
-     * @param username user name
-     * @param password password
-     * @param headers any headers to add
-     * @return a Pair for the response status and the body
+     * Add header to the request.
+     *
+     * @param request  http request to send
+     * @param username the user name
+     * @param password the password
+     * @param headers  any headers
      */
-    public Pair<Integer, String> get(String url, String username, String password,
-            Map<String, String> headers) {
-
+    private void addHeaders(HttpRequestBase request, String username, String password, Map<String,
+            String> headers) {
         String authHeader = makeAuthHeader(username, password);
-
-        try (CloseableHttpClient client =
-                HttpClientBuilder
-                        .create()
-                        .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
-                        .build()) {
-
-            HttpGet get = new HttpGet(url);
-            if (headers != null) {
-                for (Entry<String, String> entry : headers.entrySet()) {
-                    get.addHeader(entry.getKey(), headers.get(entry.getKey()));
-                }
-            }           
-            if (authHeader != null) {
-                get.setHeader(HttpHeaders.AUTHORIZATION, authHeader);
+        if (headers != null) {
+            for (Entry<String, String> entry : headers.entrySet()) {
+                request.addHeader(entry.getKey(), headers.get(entry.getKey()));
             }
-
-            HttpResponse response = client.execute(get);
-
-            String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
-
-            logger.debug("HTTP GET Response Status Code: {}",
-                    response.getStatusLine().getStatusCode());
-            logger.debug("HTTP GET Response Body:");
-            logger.debug(returnBody);
-
-            return new Pair<>(response.getStatusLine().getStatusCode(), returnBody);
         }
-        catch (IOException e) {
-            logger.error("Failed to GET to {}", url, e);
-            return null;
+        if (authHeader != null) {
+            request.setHeader(HttpHeaders.AUTHORIZATION, authHeader);
         }
     }
 
diff --git a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/HttpDeleteWithBodyTest.java b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/HttpDeleteWithBodyTest.java
new file mode 100644
index 000000000..0cb5f3aef
--- /dev/null
+++ b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/HttpDeleteWithBodyTest.java
@@ -0,0 +1,36 @@
+/*
+ * ============LICENSE_START=======================================================
+ * rest
+ * ================================================================================
+ * Copyright (C) 2018 Amdocs. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.rest;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class HttpDeleteWithBodyTest {
+
+    @Test
+    public void getMethod() {
+        String url = "http://www.example.org";
+        HttpDeleteWithBody deleteWithBody = new HttpDeleteWithBody(url);
+        assertEquals("DELETE", deleteWithBody.getMethod());
+        assertEquals(url, deleteWithBody.getURI().toString());
+    }
+}
\ No newline at end of file
diff --git a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java
index a8301810c..7e881df51 100755
--- a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java
+++ b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java
@@ -39,9 +39,9 @@ public class TestGet {
         RESTManager mgr = new RESTManager();
 
         Pair<Integer, String> result = mgr.get("http://www.example.org", null, null, null);
-        assertEquals((Integer)200, result.a);
-        assertTrue(result.b != null);
-        assertTrue(result.b.length() > 0);
+        assertEquals((Integer)200, result.first);
+        assertTrue(result.second != null);
+        assertTrue(result.second.length() > 0);
     }
 
     @Test
@@ -49,9 +49,9 @@ public class TestGet {
         RESTManager mgr = new RESTManager();
 
         Pair<Integer, String> result = mgr.get("http://www.example.org", "", null, null);
-        assertEquals((Integer)200, result.a);
-        assertTrue(result.b != null);
-        assertTrue(result.b.length() > 0);
+        assertEquals((Integer)200, result.first);
+        assertTrue(result.second != null);
+        assertTrue(result.second.length() > 0);
     }
 
     @Test
@@ -59,8 +59,8 @@ public class TestGet {
         RESTManager mgr = new RESTManager();
 
         Pair<Integer, String> result = mgr.get("http://www.example.org", "user", null, null);
-        assertEquals((Integer)200, result.a);
-        assertTrue(result.b != null);
-        assertTrue(result.b.length() > 0);
+        assertEquals((Integer)200, result.first);
+        assertTrue(result.second != null);
+        assertTrue(result.second.length() > 0);
     }
 }
\ No newline at end of file
diff --git a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPair.java b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPair.java
index aea5a7387..28e9934d1 100755
--- a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPair.java
+++ b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPair.java
@@ -32,11 +32,11 @@ public class TestPair {
         RESTManager mgr = new RESTManager();
 
         Pair<Integer, Integer> pii = mgr.new Pair<>(1, 2);
-        assertEquals((Integer) 1, (Integer) pii.a);
-        assertEquals((Integer) 2, (Integer) pii.b);
+        assertEquals((Integer) 1, (Integer) pii.first);
+        assertEquals((Integer) 2, (Integer) pii.second);
 
         Pair<Integer, String> pis = mgr.new Pair<>(1, "test");
-        assertEquals((Integer) 1, (Integer) pis.a);
-        assertEquals("test", pis.b);
+        assertEquals((Integer) 1, (Integer) pis.first);
+        assertEquals("test", pis.second);
     }
 }
diff --git a/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SOManager.java b/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SOManager.java
index a3f2be30b..5acd973ef 100644
--- a/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SOManager.java
+++ b/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SOManager.java
@@ -98,19 +98,35 @@ public final class SOManager {
     }
 
     /**
+     * Works just like {@link SOManager#asyncSORestCall(String, WorkingMemory, String, String, String, SORequest)
+     * except the vfModuleInstanceId is always null
+     *
+     * @see SOManager#asyncSORestCall(String, WorkingMemory, String, String, String, SORequest)
+     */
+    public Future<SOResponse> asyncSORestCall(final String requestID, final WorkingMemory wm,
+                                              final String serviceInstanceId, final String vnfInstanceId,
+                                              final SORequest request) {
+        return asyncSORestCall(requestID, wm, serviceInstanceId, vnfInstanceId, null, request);
+    }
+
+    /**
      * This method makes an asynchronous Rest call to MSO and inserts the response into
      * Drools working memory.
-     * 
-     * @param requestID request id
-     * @param wm the Drools working memory
-     * @param serviceInstanceId service instance id
-     * @param vnfInstanceId vnf instance id
-     * @param request the SO request
+     *
+     * @param requestID
+     * @param wm                 the Drools working memory
+     * @param serviceInstanceId  service instance id to construct the request url
+     * @param vnfInstanceId      vnf instance id to construct the request url
+     * @param vfModuleInstanceId vfModule instance id to construct the request url (required in case of delete vf
+     *                           module)
+     * @param request            the SO request
      * @return a concurrent Future for the thread that handles the request
      */
     public Future<SOResponse> asyncSORestCall(final String requestID, final WorkingMemory wm,
-                    final String serviceInstanceId, final String vnfInstanceId, final SORequest request) {
-        return executors.submit(new AsyncSORestCallThread(requestID, wm, serviceInstanceId, vnfInstanceId, request));
+                                              final String serviceInstanceId, final String vnfInstanceId, final String vfModuleInstanceId, final
+                                              SORequest request) {
+        return executors.submit(new AsyncSORestCallThread(requestID, wm, serviceInstanceId, vnfInstanceId,
+                vfModuleInstanceId, request));
     }
 
     /**
@@ -121,23 +137,26 @@ public final class SOManager {
         final WorkingMemory wm;
         final String serviceInstanceId;
         final String vnfInstanceId;
+        final String vfModuleInstanceId;
         final SORequest request;
 
         /**
          * Constructor, sets the context of the request.
          *
-         * @param requestID The request ID
-         * @param wm reference to the Drools working memory
-         * @param serviceInstanceId the service instance in SO to use
-         * @param vnfInstanceId the VNF instance that is the subject of the request
-         * @param request the request itself
+         * @param requestID          The request ID
+         * @param wm                 reference to the Drools working memory
+         * @param serviceInstanceId  the service instance in SO to use
+         * @param vnfInstanceId      the VNF instance that is the subject of the request
+         * @param vfModuleInstanceId the vf module instance id (not null in case of delete vf module request)
+         * @param request            the request itself
          */
         private AsyncSORestCallThread(final String requestID, final WorkingMemory wm, final String serviceInstanceId,
-                        final String vnfInstanceId, final SORequest request) {
+                                      final String vnfInstanceId, final String vfModuleInstanceId, final SORequest request) {
             this.requestID = requestID;
             this.wm = wm;
             this.serviceInstanceId = serviceInstanceId;
             this.vnfInstanceId = vnfInstanceId;
+            this.vfModuleInstanceId = vfModuleInstanceId;
             this.request = request;
         }
 
@@ -150,16 +169,26 @@ public final class SOManager {
             String username = PolicyEngine.manager.getEnvironmentProperty("so.username");
             String password = PolicyEngine.manager.getEnvironmentProperty("so.password");
 
-            // The URL of the request we will POST
-            String url = urlBase + "/serviceInstantiation/v7/" + serviceInstanceId + "/vnfs/" + vnfInstanceId
-                            + "/vfModules/scaleOut";
-
             // Create a JSON representation of the request
             String soJson = new GsonBuilder().disableHtmlEscaping().setPrettyPrinting().create().toJson(request);
-
-            netLogger.info("[OUT|{}|{}|]{}{}", "SO", url, LINE_SEPARATOR, soJson);
-            Pair<Integer, String> httpResponse =
-                            restManager.post(url, username, password, createSimpleHeaders(), MEDIA_TYPE, soJson);
+            String url = null;
+            Pair<Integer, String> httpResponse = null;
+
+            if (request.getOperationType() != null && request.getOperationType()
+                    .equals(SoOperationType.SCALE_OUT)) {
+                url = urlBase + "/serviceInstantiation/v7/" + serviceInstanceId + "/vnfs/" + vnfInstanceId
+                        + "/vfModules/scaleOut";
+                netLogger.info("[OUT|{}|{}|]{}{}", "SO", url, LINE_SEPARATOR, soJson);
+                httpResponse = restManager.post(url, username, password, createSimpleHeaders(), MEDIA_TYPE, soJson);
+            } else if (request.getOperationType() != null && request.getOperationType()
+                    .equals(SoOperationType.DELETE_VF_MODULE)) {
+                url = urlBase + "/serviceInstances/v7/" + serviceInstanceId + "/vnfs/" + vnfInstanceId
+                        + "/vfModules/" + vfModuleInstanceId;
+                netLogger.info("[OUT|{}|{}|]{}{}", "SO", url, LINE_SEPARATOR, soJson);
+                httpResponse = restManager.delete(url, username, password, createSimpleHeaders(), MEDIA_TYPE, soJson);
+            } else {
+                return null;
+            }
 
             // Process the response from SO
             SOResponse response = waitForSOOperationCompletion(urlBase, username, password, url, httpResponse);
@@ -241,7 +270,7 @@ public final class SOManager {
      * Parse the response message from SO into a SOResponse object.
      *
      * @param requestURL The URL of the HTTP request
-     * @param httpDetails The HTTP message returned from SO
+     * @param httpResponse The HTTP message returned from SO
      * @return The parsed response
      */
     private SOResponse processSOResponse(final String requestURL, final Pair<Integer, String> httpResponse) {
@@ -250,7 +279,7 @@ public final class SOManager {
         // A null httpDetails indicates a HTTP problem, a valid response from SO must be
         // either 200
         // or 202
-        if (!httpResultIsNullFree(httpResponse) || (httpResponse.a != 200 && httpResponse.a != 202)) {
+        if (!httpResultIsNullFree(httpResponse) || (httpResponse.first != 200 && httpResponse.first != 202)) {
             logger.error("Invalid HTTP response received from SO");
             response.setHttpResponseCode(SO_RESPONSE_ERROR);
             return response;
@@ -258,7 +287,7 @@ public final class SOManager {
 
         // Parse the JSON of the response into our POJO
         try {
-            response = Serialization.gsonPretty.fromJson(httpResponse.b, SOResponse.class);
+            response = Serialization.gsonPretty.fromJson(httpResponse.second, SOResponse.class);
         } catch (JsonSyntaxException e) {
             logger.error("Failed to deserialize HTTP response into SOResponse: ", e);
             response.setHttpResponseCode(SO_RESPONSE_ERROR);
@@ -267,14 +296,14 @@ public final class SOManager {
 
         // Set the HTTP response code of the response if needed
         if (response.getHttpResponseCode() == 0) {
-            response.setHttpResponseCode(httpResponse.a);
+            response.setHttpResponseCode(httpResponse.first);
         }
 
-        netLogger.info("[IN|{}|{}|]{}{}", "SO", requestURL, LINE_SEPARATOR, httpResponse.b);
+        netLogger.info("[IN|{}|{}|]{}{}", "SO", requestURL, LINE_SEPARATOR, httpResponse.second);
 
         if (logger.isDebugEnabled()) {
             logger.debug("***** Response to SO Request to URL {}:", requestURL);
-            logger.debug(httpResponse.b);
+            logger.debug(httpResponse.second);
         }
 
         return response;
@@ -308,7 +337,7 @@ public final class SOManager {
      * @return true if the request for the response is finished
      */
     private boolean isRequestStateFinished(final Pair<Integer, String> latestHTTPDetails, final SOResponse response) {
-        if (latestHTTPDetails != null && 200 == latestHTTPDetails.a && isRequestStateDefined(response)) {
+        if (latestHTTPDetails != null && 200 == latestHTTPDetails.first && isRequestStateDefined(response)) {
             String requestState = response.getRequest().getRequestStatus().getRequestState();
             return "COMPLETE".equalsIgnoreCase(requestState) || "FAILED".equalsIgnoreCase(requestState);
         } else {
@@ -323,7 +352,7 @@ public final class SOManager {
      * @return true if no nulls are found
      */
     private boolean httpResultIsNullFree(Pair<Integer, String> httpOperationResult) {
-        return httpOperationResult != null && httpOperationResult.a != null && httpOperationResult.b != null;
+        return httpOperationResult != null && httpOperationResult.first != null && httpOperationResult.second != null;
     }
 
     /**
diff --git a/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SORequest.java b/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SORequest.java
index 4a2f405e7..8bcbacf73 100644
--- a/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SORequest.java
+++ b/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SORequest.java
@@ -51,6 +51,8 @@ public class SORequest implements Serializable {
     @SerializedName("requestStatus")
     private SORequestStatus requestStatus;
 
+    private transient SoOperationType operationType;
+
     public SORequest() {
         // required by author
     }
@@ -111,4 +113,11 @@ public class SORequest implements Serializable {
         this.startTime = startTime;
     }
 
+    public SoOperationType getOperationType() {
+        return operationType;
+    }
+
+    public void setOperationType(SoOperationType operationType) {
+        this.operationType = operationType;
+    }
 }
diff --git a/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SoOperationType.java b/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SoOperationType.java
new file mode 100644
index 000000000..7619e3a84
--- /dev/null
+++ b/controlloop/common/model-impl/so/src/main/java/org/onap/policy/so/SoOperationType.java
@@ -0,0 +1,40 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * so
+ * ================================================================================
+ * Copyright (C) 2018 Amdocs. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.so;
+
+/**
+ * Enumeration of SO Operations type that can be performed by a policy
+ */
+public enum SoOperationType {
+    SCALE_OUT("Create Vf Module"),
+    DELETE_VF_MODULE("Delete Vf Module");
+
+    private String operationType;
+
+    SoOperationType(String operationType) {
+        this.operationType = operationType;
+    }
+
+    @Override
+    public String toString() {
+        return this.operationType;
+    }
+}
diff --git a/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoDummyServer.java b/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoDummyServer.java
index 5eb0a01ee..0d719e50d 100644
--- a/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoDummyServer.java
+++ b/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoDummyServer.java
@@ -25,6 +25,7 @@ package org.onap.policy.so;
 import com.google.gson.Gson;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import javax.ws.rs.DELETE;
 import javax.ws.rs.GET;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
@@ -38,6 +39,7 @@ public class TestSoDummyServer {
     private static int putMessagesReceived = 0;
     private static int statMessagesReceived = 0;
     private static int getMessagesReceived = 0;
+    private static int deleteMessagesReceived = 0;
 
     private static Map<String, SOResponse> ongoingRequestMap = new ConcurrentHashMap<>();
 
@@ -51,7 +53,9 @@ public class TestSoDummyServer {
     public Response serviceGetStats() {
         statMessagesReceived++;
         return Response.status(200).entity("{\"GET\": " + getMessagesReceived + ",\"STAT\": " + statMessagesReceived
-                        + ",\"POST\": " + postMessagesReceived + ",\"PUT\": " + putMessagesReceived + "}").build();
+                + ",\"POST\": " + postMessagesReceived + ",\"PUT\": " + putMessagesReceived
+                + ",\"DELETE\": " + deleteMessagesReceived + "}").build();
+
     }
 
     /**
@@ -77,98 +81,78 @@ public class TestSoDummyServer {
     @Path("/serviceInstantiation/v7")
     public Response servicePostRequest(final String jsonString) {
         postMessagesReceived++;
+        return buildResponse(jsonString);
+    }
 
-        if (jsonString == null) {
-            return Response.status(400).build();
-        }
-
-        SORequest request = null;
-        try {
-            request = new Gson().fromJson(jsonString, SORequest.class);
-        } catch (Exception e) {
-            return Response.status(400).build();
-        }
-
-        if (request == null) {
-            return Response.status(400).build();
-        }
-
-        if (request.getRequestType() == null) {
-            return Response.status(400).build();
-        }
-
-        if ("ReturnBadJson".equals(request.getRequestType())) {
-            return Response.status(200)
-                            .entity("{\"GET\": , " + getMessagesReceived + ",\"STAT\": " + statMessagesReceived
-                                            + ",\"POST\": , " + postMessagesReceived + ",\"PUT\": "
-                                            + putMessagesReceived + "}")
-                            .build();
-        }
-
-        SOResponse response = new SOResponse();
-        response.setRequest(request);
-        response.setRequestReferences(new SORequestReferences());
-        response.getRequestReferences().setRequestId(request.getRequestId().toString());
-
-        if ("ReturnCompleted".equals(request.getRequestType())) {
-            response.getRequest().getRequestStatus().setRequestState("COMPLETE");
-            response.setHttpResponseCode(200);
-            String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
-        }
-
-        if ("ReturnFailed".equals(request.getRequestType())) {
-            response.getRequest().getRequestStatus().setRequestState("FAILED");
-            response.setHttpResponseCode(200);
-            String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
-        }
-
-        if ("ReturnOnging202".equals(request.getRequestType())) {
-            ongoingRequestMap.put(request.getRequestId().toString(), response);
+    /**
+     * Post.
+     * 
+     * @param serviceInstanceId service instance id
+     * @param vnfInstanceId vnf instance id
+     * @param jsonString json body
+     * @return http response
+     */
+    @POST
+    @Path("/serviceInstantiation/v7/{serviceInstanceId}/vnfs/{vnfInstanceId}/vfModules/scaleOut")
+    public Response servicePostRequestVfModules(@PathParam("serviceInstanceId") final String serviceInstanceId,
+                    @PathParam("vnfInstanceId") final String vnfInstanceId, final String jsonString) {
+        postMessagesReceived++;
+        return buildResponse(jsonString);
+    }
 
-            response.getRequest().getRequestStatus().setRequestState("ONGOING");
-            response.setHttpResponseCode(202);
-            String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
-        }
+    /**
+     * Get instance ID.
+     * 
+     * @param nsInstanceId node instance id
+     * @return http response
+     */
+    @GET
+    @Path("/orchestrationRequests/v5/{nsInstanceId}")
+    public Response soRequestStatus(@PathParam("nsInstanceId") final String nsInstanceId) {
 
-        if ("ReturnOnging200".equals(request.getRequestType())) {
-            ongoingRequestMap.put(request.getRequestId().toString(), response);
+        SOResponse response = ongoingRequestMap.get(nsInstanceId);
 
-            response.getRequest().getRequestStatus().setRequestState("ONGOING");
-            response.setHttpResponseCode(200);
+        int iterationsLeft = Integer.valueOf(response.getRequest().getRequestScope());
+        if (--iterationsLeft > 0) {
+            response.getRequest().setRequestScope(new Integer(iterationsLeft).toString());
             String responseString = new Gson().toJson(response, SOResponse.class);
             return Response.status(response.getHttpResponseCode()).entity(responseString).build();
         }
 
+        ongoingRequestMap.remove(nsInstanceId);
 
-        if ("ReturnBadAfterWait".equals(request.getRequestType())) {
-            ongoingRequestMap.put(request.getRequestId().toString(), response);
-
-            response.getRequest().getRequestStatus().setRequestState("ONGOING");
-            response.setHttpResponseCode(200);
-            String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
+        if ("ReturnBadAfterWait".equals(response.getRequest().getRequestType())) {
+            return Response.status(400).build();
         }
 
-        return null;
+        response.getRequest().getRequestStatus().setRequestState("COMPLETE");
+        response.getRequest().setRequestScope("0");
+        response.setHttpResponseCode(200);
+        String responseString = new Gson().toJson(response, SOResponse.class);
+        return Response.status(response.getHttpResponseCode()).entity(responseString).build();
     }
 
     /**
-     * Post.
-     * 
+     * Delete.
+     *
      * @param serviceInstanceId service instance id
      * @param vnfInstanceId vnf instance id
+     * @param vfModuleInstanceId vf module instance id
      * @param jsonString json body
      * @return http response
      */
-    @POST
-    @Path("/serviceInstantiation/v7/{serviceInstanceId}/vnfs/{vnfInstanceId}/vfModules/scaleOut")
-    public Response servicePostRequestVfModules(@PathParam("serviceInstanceId") final String serviceInstanceId,
-                    @PathParam("vnfInstanceId") final String vnfInstanceId, final String jsonString) {
-        postMessagesReceived++;
+    @DELETE
+    @Path("/serviceInstances/v7/{serviceInstanceId}/vnfs/{vnfInstanceId}/vfModules/{vfModuleInstanceId}")
+    public Response serviceDeleteRequestVfModules(
+            @PathParam("serviceInstanceId") final String serviceInstanceId,
+            @PathParam("vnfInstanceId") final String vnfInstanceId,
+            @PathParam("vfModuleInstanceId") final String vfModuleInstanceId,
+            final String jsonString) {
+        deleteMessagesReceived++;
+        return buildResponse(jsonString);
+    }
 
+    private Response buildResponse(String jsonString) {
         if (jsonString == null) {
             return Response.status(400).build();
         }
@@ -190,10 +174,9 @@ public class TestSoDummyServer {
 
         if ("ReturnBadJson".equals(request.getRequestType())) {
             return Response.status(200)
-                            .entity("{\"GET\": , " + getMessagesReceived + ",\"STAT\": " + statMessagesReceived
-                                            + ",\"POST\": , " + postMessagesReceived + ",\"PUT\": "
-                                            + putMessagesReceived + "}")
-                            .build();
+                    .entity("{\"GET\": , " + getMessagesReceived + ",\"STAT\": " + statMessagesReceived
+                            + ",\"POST\":" + " , " + postMessagesReceived + ",\"PUT\": " + putMessagesReceived
+                            + ",\"DELETE\": " + deleteMessagesReceived + "}").build();
         }
 
         SOResponse response = new SOResponse();
@@ -205,14 +188,18 @@ public class TestSoDummyServer {
             response.getRequest().getRequestStatus().setRequestState("COMPLETE");
             response.setHttpResponseCode(200);
             String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
+            return Response.status(response.getHttpResponseCode())
+                    .entity(responseString)
+                    .build();
         }
 
         if ("ReturnFailed".equals(request.getRequestType())) {
             response.getRequest().getRequestStatus().setRequestState("FAILED");
             response.setHttpResponseCode(200);
             String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
+            return Response.status(response.getHttpResponseCode())
+                    .entity(responseString)
+                    .build();
         }
 
         if ("ReturnOnging202".equals(request.getRequestType())) {
@@ -221,7 +208,9 @@ public class TestSoDummyServer {
             response.getRequest().getRequestStatus().setRequestState("ONGOING");
             response.setHttpResponseCode(202);
             String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
+            return Response.status(response.getHttpResponseCode())
+                    .entity(responseString)
+                    .build();
         }
 
         if ("ReturnOnging200".equals(request.getRequestType())) {
@@ -230,51 +219,21 @@ public class TestSoDummyServer {
             response.getRequest().getRequestStatus().setRequestState("ONGOING");
             response.setHttpResponseCode(200);
             String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
+            return Response.status(response.getHttpResponseCode())
+                    .entity(responseString)
+                    .build();
         }
 
-
         if ("ReturnBadAfterWait".equals(request.getRequestType())) {
             ongoingRequestMap.put(request.getRequestId().toString(), response);
 
             response.getRequest().getRequestStatus().setRequestState("ONGOING");
             response.setHttpResponseCode(200);
             String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
+            return Response.status(response.getHttpResponseCode())
+                    .entity(responseString)
+                    .build();
         }
-
         return null;
     }
-
-    /**
-     * Get instance ID.
-     * 
-     * @param nsInstanceId node instance id
-     * @return http response
-     */
-    @GET
-    @Path("/orchestrationRequests/v5/{nsInstanceId}")
-    public Response soRequestStatus(@PathParam("nsInstanceId") final String nsInstanceId) {
-
-        SOResponse response = ongoingRequestMap.get(nsInstanceId);
-
-        int iterationsLeft = Integer.valueOf(response.getRequest().getRequestScope());
-        if (--iterationsLeft > 0) {
-            response.getRequest().setRequestScope(new Integer(iterationsLeft).toString());
-            String responseString = new Gson().toJson(response, SOResponse.class);
-            return Response.status(response.getHttpResponseCode()).entity(responseString).build();
-        }
-
-        ongoingRequestMap.remove(nsInstanceId);
-
-        if ("ReturnBadAfterWait".equals(response.getRequest().getRequestType())) {
-            return Response.status(400).build();
-        }
-
-        response.getRequest().getRequestStatus().setRequestState("COMPLETE");
-        response.getRequest().setRequestScope("0");
-        response.setHttpResponseCode(200);
-        String responseString = new Gson().toJson(response, SOResponse.class);
-        return Response.status(response.getHttpResponseCode()).entity(responseString).build();
-    }
 }
diff --git a/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoManager.java b/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoManager.java
index 38bfcd398..20cb54fca 100644
--- a/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoManager.java
+++ b/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoManager.java
@@ -51,10 +51,18 @@ public class TestSoManager {
     private static final String BASE_SO_URI = BASE_URI + "/SO";
     private static HttpServer server;
 
+    /**
+     * Set up test class.
+     */
     @BeforeClass
-    public static void setUp() {
+    public static void setUp() throws IOException {
         final ResourceConfig rc = new ResourceConfig(TestSoDummyServer.class);
-        server = GrizzlyHttpServerFactory.createHttpServer(URI.create(BASE_URI), rc);
+        //Grizzly by default doesn't allow payload for HTTP methods (ex: DELETE), for which HTTP spec doesn't
+        // explicitly state that.
+        //allow it before starting the server
+        server = GrizzlyHttpServerFactory.createHttpServer(URI.create(BASE_URI), rc, false);
+        server.getServerConfiguration().setAllowPayloadForUndefinedHttpMethods(true);
+        server.start();
     }
 
     @AfterClass
@@ -69,7 +77,8 @@ public class TestSoManager {
         CloseableHttpResponse response = httpclient.execute(httpGet);
 
         String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
-        assertTrue(returnBody.matches("^\\{\"GET\": [0-9]*,\"STAT\": [0-9]*,\"POST\": [0-9]*,\"PUT\": [0-9]*\\}$"));
+        assertTrue(returnBody.matches("^\\{\"GET\": [0-9]*,\"STAT\": [0-9]*,\"POST\": [0-9]*,\"PUT\": [0-9]*,"
+                + "\"DELETE\": [0-9]*\\}$"));
     }
 
     @Test
@@ -78,8 +87,8 @@ public class TestSoManager {
         assertNotNull(manager);
         manager.setRestGetTimeout(100);
 
-        SOResponse response =
-                        manager.createModuleInstance("http:/localhost:99999999", BASE_SO_URI, "sean", "citizen", null);
+        SOResponse response = manager.createModuleInstance("http:/localhost:99999999", BASE_SO_URI, "sean",
+                "citizen", null);
         assertNull(response);
 
         response = manager.createModuleInstance(BASE_SO_URI + "/serviceInstantiation/v7", BASE_SO_URI, "sean",
@@ -158,9 +167,11 @@ public class TestSoManager {
 
         WorkingMemory wm = new DummyWorkingMemory();
 
+        SORequest soRequest = new SORequest();
+        soRequest.setOperationType(SoOperationType.SCALE_OUT);
         PolicyEngine.manager.setEnvironmentProperty("so.url", "http:/localhost:99999999");
         Future<SOResponse> asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm,
-                        UUID.randomUUID().toString(), UUID.randomUUID().toString(), null);
+                        UUID.randomUUID().toString(), UUID.randomUUID().toString(), soRequest);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals(999, response.getHttpResponseCode());
@@ -170,7 +181,7 @@ public class TestSoManager {
 
         PolicyEngine.manager.setEnvironmentProperty("so.url", BASE_SO_URI);
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), null);
+                        UUID.randomUUID().toString(), soRequest);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals(999, response.getHttpResponseCode());
@@ -178,8 +189,122 @@ public class TestSoManager {
             fail("test should not throw an exception");
         }
 
+        SORequest request = new SORequest();
+        request.setRequestId(UUID.randomUUID());
+        request.setRequestScope("Test");
+        request.setRequestType("ReturnBadJson");
+        request.setStartTime("2018-03-23 16:31");
+        request.setRequestStatus(new SORequestStatus());
+        request.getRequestStatus().setRequestState("ONGOING");
+        request.setOperationType(SoOperationType.SCALE_OUT);
+
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertEquals(999, response.getHttpResponseCode());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        request.setRequestType("ReturnCompleted");
+
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertEquals("COMPLETE", response.getRequest().getRequestStatus().getRequestState());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        request.setRequestType("ReturnFailed");
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertEquals("FAILED", response.getRequest().getRequestStatus().getRequestState());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        // Use scope to set the number of iterations we'll wait for
+
+        request.setRequestType("ReturnOnging200");
+        request.setRequestScope(new Integer(10).toString());
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertNotNull(response.getRequest());
+            assertEquals("COMPLETE", response.getRequest().getRequestStatus().getRequestState());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        request.setRequestType("ReturnOnging202");
+        request.setRequestScope(new Integer(20).toString());
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertNotNull(response.getRequest());
+            assertEquals("COMPLETE", response.getRequest().getRequestStatus().getRequestState());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        // Test timeout after 20 attempts for a response
+        request.setRequestType("ReturnOnging202");
+        request.setRequestScope(new Integer(21).toString());
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertEquals(999, response.getHttpResponseCode());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        // Test bad response after 3 attempts for a response
+        request.setRequestType("ReturnBadAfterWait");
+        request.setRequestScope(new Integer(3).toString());
+        asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
+                        UUID.randomUUID().toString(), request);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertEquals(999, response.getHttpResponseCode());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testVfModuleDeletion() {
+        SOManager manager = new SOManager();
+        assertNotNull(manager);
+        manager.setRestGetTimeout(100);
+
+        PolicyEngine.manager.setEnvironmentProperty("so.username", "sean");
+        PolicyEngine.manager.setEnvironmentProperty("so.password", "citizen");
+
+        WorkingMemory wm = new DummyWorkingMemory();
+
+        SORequest soRequest = new SORequest();
+        soRequest.setOperationType(SoOperationType.DELETE_VF_MODULE);
+        PolicyEngine.manager.setEnvironmentProperty("so.url", "http:/localhost:99999999");
+        Future<SOResponse> asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm,
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), UUID.randomUUID().toString(), soRequest);
+        try {
+            SOResponse response = asyncRestCallFuture.get();
+            assertEquals(999, response.getHttpResponseCode());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        PolicyEngine.manager.setEnvironmentProperty("so.url", BASE_SO_URI);
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), new SORequest());
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), soRequest);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals(999, response.getHttpResponseCode());
@@ -194,9 +319,10 @@ public class TestSoManager {
         request.setStartTime("2018-03-23 16:31");
         request.setRequestStatus(new SORequestStatus());
         request.getRequestStatus().setRequestState("ONGOING");
+        request.setOperationType(SoOperationType.DELETE_VF_MODULE);
 
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals(999, response.getHttpResponseCode());
@@ -207,7 +333,7 @@ public class TestSoManager {
         request.setRequestType("ReturnCompleted");
 
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals("COMPLETE", response.getRequest().getRequestStatus().getRequestState());
@@ -217,7 +343,7 @@ public class TestSoManager {
 
         request.setRequestType("ReturnFailed");
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals("FAILED", response.getRequest().getRequestStatus().getRequestState());
@@ -230,7 +356,7 @@ public class TestSoManager {
         request.setRequestType("ReturnOnging200");
         request.setRequestScope(new Integer(10).toString());
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertNotNull(response.getRequest());
@@ -242,7 +368,7 @@ public class TestSoManager {
         request.setRequestType("ReturnOnging202");
         request.setRequestScope(new Integer(20).toString());
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertNotNull(response.getRequest());
@@ -255,7 +381,7 @@ public class TestSoManager {
         request.setRequestType("ReturnOnging202");
         request.setRequestScope(new Integer(21).toString());
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals(999, response.getHttpResponseCode());
@@ -267,7 +393,7 @@ public class TestSoManager {
         request.setRequestType("ReturnBadAfterWait");
         request.setRequestScope(new Integer(3).toString());
         asyncRestCallFuture = manager.asyncSORestCall(UUID.randomUUID().toString(), wm, UUID.randomUUID().toString(),
-                        UUID.randomUUID().toString(), request);
+                UUID.randomUUID().toString(), UUID.randomUUID().toString(), request);
         try {
             SOResponse response = asyncRestCallFuture.get();
             assertEquals(999, response.getHttpResponseCode());
diff --git a/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoRequest.java b/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoRequest.java
index f58254184..2f9bf68bb 100755
--- a/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoRequest.java
+++ b/controlloop/common/model-impl/so/src/test/java/org/onap/policy/so/TestSoRequest.java
@@ -65,6 +65,9 @@ public class TestSoRequest {
         obj.setRequestType("requestType");
         assertEquals("requestType", obj.getRequestType());
 
+        obj.setOperationType(SoOperationType.DELETE_VF_MODULE);
+        assertEquals(SoOperationType.DELETE_VF_MODULE, obj.getOperationType());
+
         LocalDateTime startTime = LocalDateTime.now();
         obj.setStartTime(startTime.toString());
         assertEquals(startTime.toString(), obj.getStartTime());
diff --git a/controlloop/common/model-impl/vfc/src/main/java/org/onap/policy/vfc/VFCManager.java b/controlloop/common/model-impl/vfc/src/main/java/org/onap/policy/vfc/VFCManager.java
index 1a8d603b5..d84d0403f 100644
--- a/controlloop/common/model-impl/vfc/src/main/java/org/onap/policy/vfc/VFCManager.java
+++ b/controlloop/common/model-impl/vfc/src/main/java/org/onap/policy/vfc/VFCManager.java
@@ -108,14 +108,14 @@ public final class VFCManager implements Runnable {
             return;
         }
 
-        if (httpDetails.a != 202) {
+        if (httpDetails.first != 202) {
             logger.warn("VFC Heal Restcall failed");
             return;
         }
 
         try {
-            VFCResponse response = Serialization.gsonPretty.fromJson(httpDetails.b, VFCResponse.class);
-            netLogger.info("[IN|{}|{}|]{}{}", "VFC", vfcUrl, SYSTEM_LS, httpDetails.b);
+            VFCResponse response = Serialization.gsonPretty.fromJson(httpDetails.second, VFCResponse.class);
+            netLogger.info("[IN|{}|{}|]{}{}", "VFC", vfcUrl, SYSTEM_LS, httpDetails.second);
             String body = Serialization.gsonPretty.toJson(response);
             logger.debug("Response to VFC Heal post:");
             logger.debug(body);
@@ -129,15 +129,15 @@ public final class VFCManager implements Runnable {
             while (attemptsLeft-- > 0) {
                 netLogger.info("[OUT|{}|{}|]", "VFC", urlGet);
                 Pair<Integer, String> httpDetailsGet = restManager.get(urlGet, username, password, headers);
-                responseGet = Serialization.gsonPretty.fromJson(httpDetailsGet.b, VFCResponse.class);
-                netLogger.info("[IN|{}|{}|]{}{}", "VFC", urlGet, SYSTEM_LS, httpDetailsGet.b);
+                responseGet = Serialization.gsonPretty.fromJson(httpDetailsGet.second, VFCResponse.class);
+                netLogger.info("[IN|{}|{}|]{}{}", "VFC", urlGet, SYSTEM_LS, httpDetailsGet.second);
                 responseGet.setRequestId(vfcRequest.getRequestId().toString());
                 body = Serialization.gsonPretty.toJson(responseGet);
                 logger.debug("Response to VFC Heal get:");
                 logger.debug(body);
 
                 String responseStatus = responseGet.getResponseDescriptor().getStatus();
-                if (httpDetailsGet.a == 200
+                if (httpDetailsGet.first == 200
                         && ("finished".equalsIgnoreCase(responseStatus) || "error".equalsIgnoreCase(responseStatus))) {
                     logger.debug("VFC Heal Status {}", responseGet.getResponseDescriptor().getStatus());
                     workingMem.insert(responseGet);
diff --git a/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/GuardSimulatorTest.java b/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/GuardSimulatorTest.java
index cebf5f7fe..3768b1b32 100644
--- a/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/GuardSimulatorTest.java
+++ b/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/GuardSimulatorTest.java
@@ -60,16 +60,16 @@ public class GuardSimulatorTest {
         Pair<Integer, String> response =
                 new RESTManager().post(url, "testUname", "testPass", null, "application/json", request);
         assertNotNull(response);
-        assertNotNull(response.a);
-        assertNotNull(response.b);
-        assertEquals("{\"decision\": \"PERMIT\", \"details\": \"Decision Permit. OK!\"}", response.b);
+        assertNotNull(response.first);
+        assertNotNull(response.second);
+        assertEquals("{\"decision\": \"PERMIT\", \"details\": \"Decision Permit. OK!\"}", response.second);
 
         request = makeRequest("test_actor_id", "test_op_id", "test_target", "denyGuard");
         response = new RESTManager().post(url, "testUname", "testPass", null, "application/json", request);
         assertNotNull(response);
-        assertNotNull(response.a);
-        assertNotNull(response.b);
-        assertEquals("{\"decision\": \"DENY\", \"details\": \"Decision Deny. You asked for it\"}", response.b);
+        assertNotNull(response.first);
+        assertNotNull(response.second);
+        assertEquals("{\"decision\": \"DENY\", \"details\": \"Decision Deny. You asked for it\"}", response.second);
     }
 
     private static String makeRequest(String actor, String recipe, String target, String clName) {
diff --git a/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/SoSimulatorTest.java b/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/SoSimulatorTest.java
index 4fce837b9..772dd7f2c 100644
--- a/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/SoSimulatorTest.java
+++ b/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/SoSimulatorTest.java
@@ -142,7 +142,7 @@ public class SoSimulatorTest {
                         "http://localhost:6667/serviceInstantiation/v7/12345/vnfs/12345/vfModules/scaleOut", "username",
                         "password", new HashMap<>(), "application/json", request);
         assertNotNull(httpDetails);
-        final SOResponse response = Serialization.gsonPretty.fromJson(httpDetails.b, SOResponse.class);
+        final SOResponse response = Serialization.gsonPretty.fromJson(httpDetails.second, SOResponse.class);
         assertNotNull(response);
     }
 }
diff --git a/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/VfcSimulatorTest.java b/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/VfcSimulatorTest.java
index 8a7afb959..0e083bb6c 100644
--- a/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/VfcSimulatorTest.java
+++ b/controlloop/common/simulators/src/test/java/org/onap/policy/simulators/VfcSimulatorTest.java
@@ -63,8 +63,8 @@ public class VfcSimulatorTest {
                 new RESTManager().post("http://localhost:6668/api/nslcm/v1/ns/1234567890/heal", "username", "password",
                         new HashMap<String, String>(), "application/json", "Some Request Here");
         assertNotNull(httpDetails);
-        assertTrue(httpDetails.a == 202);
-        final VFCResponse response = Serialization.gsonPretty.fromJson(httpDetails.b, VFCResponse.class);
+        assertTrue(httpDetails.first == 202);
+        final VFCResponse response = Serialization.gsonPretty.fromJson(httpDetails.second, VFCResponse.class);
         assertNotNull(response);
     }
 
@@ -73,7 +73,7 @@ public class VfcSimulatorTest {
         final Pair<Integer, String> httpDetails = new RESTManager().get("http://localhost:6668/api/nslcm/v1/jobs/1234",
                 "username", "password", new HashMap<String, String>());
         assertNotNull(httpDetails);
-        final VFCResponse response = Serialization.gsonPretty.fromJson(httpDetails.b, VFCResponse.class);
+        final VFCResponse response = Serialization.gsonPretty.fromJson(httpDetails.second, VFCResponse.class);
         assertNotNull(response);
     }
 }