Flatten the CDS grpc request payload

Before:
{
    "vfw-modify-config-request":{
        "resolution-key":"1234567890",
        "aai-properties":{
            "service-instance.service-instance-id":"1234",
            "generic-vnf.vnf-id":"5678"
        },
        "policy-payload":{
            "data":"{\"active-streams\":\"5\"}"
        }
    }
}

After:
{
    "vfw-modify-config-request":{
        "resolution-key":"1234567890",
        "vfw-modify-config-properties":{
            "service-instance.service-instance-id":"1234",
            "generic-vnf.vnf-id":"5678",
            "data":"{\"active-streams\":\"5\"}"
        }
    }
}

Issue-ID: POLICY-2089
Signed-off-by: Rashmi Pujar <rashmi.pujar@bell.ca>
Change-Id: I139a7ca3e1e2d0cd50bbd86d0cdf499f215be74f

4 files changed, 92 insertions, 66 deletions

diff --git a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/CdsActorServiceProvider.java b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/CdsActorServiceProvider.java
index 5501f8618..65cc03931 100644
--- a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/CdsActorServiceProvider.java
+++ b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/CdsActorServiceProvider.java
@@ -42,10 +42,11 @@ import org.onap.policy.cds.CdsResponse;
 import org.onap.policy.cds.api.CdsProcessorListener;
 import org.onap.policy.cds.client.CdsProcessorGrpcClient;
 import org.onap.policy.cds.properties.CdsServerProperties;
+import org.onap.policy.common.utils.coder.CoderException;
 import org.onap.policy.controlloop.ControlLoopOperation;
 import org.onap.policy.controlloop.VirtualControlLoopEvent;
-import org.onap.policy.controlloop.actor.cds.beans.CdsActionRequest;
 import org.onap.policy.controlloop.actor.cds.constants.CdsActorConstants;
+import org.onap.policy.controlloop.actor.cds.request.CdsActionRequest;
 import org.onap.policy.controlloop.actorserviceprovider.spi.Actor;
 import org.onap.policy.controlloop.policy.Policy;
 import org.slf4j.Logger;
@@ -131,13 +132,13 @@ public class CdsActorServiceProvider implements Actor {
 
         Builder struct = Struct.newBuilder();
         try {
-            String requestStr = request.toString();
+            String requestStr = request.generateCdsPayload();
             Preconditions.checkState(!Strings.isNullOrEmpty(requestStr), "Unable to build "
                 + "config-deploy-request from payload parameters: {}", payload);
             JsonFormat.parser().merge(requestStr, struct);
-        } catch (InvalidProtocolBufferException e) {
-            LOGGER.error("Failed to parse received message. blueprint({}:{}) for action({})", cbaName, cbaVersion,
-                cbaActionName, e);
+        } catch (InvalidProtocolBufferException | CoderException e) {
+            LOGGER.error("Failed to embed CDS payload string into the input request. blueprint({}:{}) for action({})",
+                    cbaName, cbaVersion, cbaActionName, e);
             return Optional.empty();
         }
 
diff --git a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/beans/CdsActionRequest.java b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/beans/CdsActionRequest.java
deleted file mode 100644
index 32f102382..000000000
--- a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/beans/CdsActionRequest.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*-
- * ============LICENSE_START=======================================================
- * Copyright (C) 2019 Bell Canada. 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.controlloop.actor.cds.beans;
-
-import com.google.gson.annotations.SerializedName;
-
-import java.io.Serializable;
-import java.util.Map;
-import lombok.Getter;
-import lombok.Setter;
-import org.onap.policy.common.utils.coder.Coder;
-import org.onap.policy.common.utils.coder.CoderException;
-import org.onap.policy.common.utils.coder.StandardCoder;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-@Getter
-@Setter
-public class CdsActionRequest implements Serializable {
-    private static final long serialVersionUID = -4172157702597791493L;
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(CdsActionRequest.class);
-    private static final Coder CODER = new StandardCoder();
-
-    @SerializedName("policy-payload")
-    private Map<String, String> policyPayload;
-
-    @SerializedName("aai-properties")
-    private Map<String, String> aaiProperties;
-
-    @SerializedName("resolution-key")
-    private String resolutionKey;
-
-    private transient String actionName;
-
-    @Override
-    public String toString() {
-        try {
-            return "{" + "\"" + actionName + "-request\":" + CODER.encode(this) + '}';
-        } catch (CoderException e) {
-            LOGGER.error("Failure serializing CdsActionRequest object: ", e);
-            return "";
-        }
-    }
-}
diff --git a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/constants/CdsActorConstants.java b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/constants/CdsActorConstants.java
index 9adb69232..8f929c83e 100644
--- a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/constants/CdsActorConstants.java
+++ b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/constants/CdsActorConstants.java
@@ -32,6 +32,9 @@ public class CdsActorConstants {
     // CDS blueprint archive parameters
     public static final String KEY_CBA_NAME = "artifact_name";
     public static final String KEY_CBA_VERSION = "artifact_version";
+    public static final String KEY_RESOLUTION_KEY = "resolution-key";
+    public static final String CDS_REQUEST_SUFFIX = "-request";
+    public static final String CDS_REQUEST_PROPERTIES_SUFFIX = "-properties";
     public static final String ORIGINATOR_ID = "POLICY";
     // Temporarily set to synchronous mode to support current rules, since callbacks aren't supported yet
     public static final String CDS_MODE = "sync";
diff --git a/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/request/CdsActionRequest.java b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/request/CdsActionRequest.java
new file mode 100644
index 000000000..38ab2bdc7
--- /dev/null
+++ b/models-interactions/model-actors/actor.cds/src/main/java/org/onap/policy/controlloop/actor/cds/request/CdsActionRequest.java
@@ -0,0 +1,83 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2019 Bell Canada. 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.controlloop.actor.cds.request;
+
+import java.io.Serializable;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import lombok.Getter;
+import lombok.Setter;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.controlloop.actor.cds.constants.CdsActorConstants;
+
+@Getter
+@Setter
+public class CdsActionRequest implements Serializable {
+
+    private static final long serialVersionUID = -4172157702597791493L;
+    private static final StandardCoder CODER = new StandardCoder();
+
+    private String actionName;
+    private String resolutionKey;
+    private Map<String, String> aaiProperties;
+    private Map<String, String> policyPayload;
+
+    /**
+     * Generate the CDS gRPC request payload from the action-name (aka operational policy recipe).
+     * The CDS gRPC request payload generation follows the below pattern:
+     *  {
+     *    "{@link CdsActionRequest#getActionName()}-request": {
+     *      "resolution-key": "{@link CdsActionRequest#getResolutionKey()} ()}",
+     *      "{@link CdsActionRequest#getActionName()}-properties": {
+     *        "{@link CdsActionRequest#getAaiProperties()} ()}",
+     *        "{@link CdsActionRequest#getPolicyPayload()} ()}"
+     *      }
+     *    }
+     *  }
+     * @return JSON string equivalent of the CDS request object
+     * @throws CoderException if error occurs when serializing to JSON string
+     */
+    public String generateCdsPayload() throws CoderException {
+        // 1. Build the innermost object to include AAI properties and policy payload information
+        Map<String, String> cdsActionPropsMap = new LinkedHashMap<>();
+        cdsActionPropsMap.putAll(aaiProperties);
+        cdsActionPropsMap.putAll(policyPayload);
+
+        // 2. Build the enclosing CDS action request properties object to contain (1) and the resolution-key
+        Map<String, Object> cdsActionRequestMap = new LinkedHashMap<>();
+        cdsActionRequestMap.put(CdsActorConstants.KEY_RESOLUTION_KEY, resolutionKey);
+        cdsActionRequestMap.put(generateCdsActionPropertiesKey(), cdsActionPropsMap);
+
+        // 3. Finally build the CDS action request object
+        Map<String, Object> cdsActionRequestObj = new LinkedHashMap<>();
+        cdsActionRequestObj.put(generateCdsActionRequestKey(), cdsActionRequestMap);
+
+        // 4. Serialize the CDS action request object
+        return CODER.encode(cdsActionRequestObj);
+    }
+
+    private String generateCdsActionPropertiesKey() {
+        return actionName + CdsActorConstants.CDS_REQUEST_PROPERTIES_SUFFIX;
+    }
+
+    private String generateCdsActionRequestKey() {
+        return actionName + CdsActorConstants.CDS_REQUEST_SUFFIX;
+    }
+}