Update new SDNR actor with v2.0 structures

SDNR v2.0 introduced an extra "input" and "output" layer within
the body of the messages.  Added POJOs to match that, and updated
the actor to use the new POJOs so that no extra steps are needed
during serialization or deserialization.
Also modified the SDNR and APPC-LCM simulators to discard request messages
when looking for the response, if the sink and source topics happen to
be the same.
Added the SDNR simulator.
Added more coverage to the SDNR actor.
Fixed a sonar issue in the SDNR junit code:
- use a constant instead of a literal (i.e., for "ModifyConfig")

Issue-ID: POLICY-2434
Signed-off-by: Jim Hahn <jrh3@att.com>
Change-Id: I70914a299dd5e9ee8eaccb5d42a2596cab814091

2 files changed, 60 insertions, 0 deletions

diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/AppcLcmTopicServer.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/AppcLcmTopicServer.java
index df4cbb31e..6b2eabe8d 100644
--- a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/AppcLcmTopicServer.java
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/AppcLcmTopicServer.java
@@ -36,6 +36,15 @@ public class AppcLcmTopicServer extends TopicServer<AppcLcmDmaapWrapper> {
 
     @Override
     protected String process(AppcLcmDmaapWrapper request) {
+        /*
+         * In case the request and response are on the same topic, this may be invoked
+         * with a request or with a response object. If the "output" is not null, then we
+         * know it's a response.
+         */
+        if (request.getBody().getOutput() != null) {
+            return null;
+        }
+
         String response = ResourceUtils.getResourceAsString("org/onap/policy/simulators/appclcm/appc.lcm.success.json");
         return response.replace("${replaceMe}", request.getBody().getInput().getCommonHeader().getSubRequestId());
     }
diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SdnrTopicServer.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SdnrTopicServer.java
new file mode 100644
index 000000000..043a2c523
--- /dev/null
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SdnrTopicServer.java
@@ -0,0 +1,51 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. 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.simulators;
+
+import org.onap.policy.common.endpoints.event.comm.TopicSink;
+import org.onap.policy.common.endpoints.event.comm.TopicSource;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.common.utils.resources.ResourceUtils;
+import org.onap.policy.sdnr.PciMessage;
+
+/**
+ * SDNR topic server.
+ */
+public class SdnrTopicServer extends TopicServer<PciMessage> {
+    public SdnrTopicServer(TopicSink sink, TopicSource source) {
+        super(sink, source, new StandardCoder(), PciMessage.class);
+    }
+
+    @Override
+    protected String process(PciMessage request) {
+        /*
+         * In case the request and response are on the same topic, this may be invoked
+         * with a request or with a response object. If the "output" is null, then we know
+         * it's a response.
+         */
+        if (request.getBody().getOutput() != null) {
+            return null;
+        }
+
+        String response = ResourceUtils.getResourceAsString("org/onap/policy/simulators/sdnr/vpci.sdnr.success.json");
+        return response.replace("${replaceMe}", request.getBody().getInput().getCommonHeader().getSubRequestId());
+    }
+}