SO poll should not require request ID

When SO is polled for the result of a previous request, it
does not necessarily include the originally returned request
ID in the response.  This causes the SO actor to generate a
"missing request ID in response" exception.
Modified the actor to only extract the request ID from the
first response and cache it for subsequeent responses.
Testing this required the SO simulator to be modified so that
it would return an INCOMPLETE on the initial request, forcing
the actor to poll until it returns a COMPLETE.  Made this a
settable flag so that it could be enabled just to test the
SO actor without impacting other components (e.g., drools-apps,
CSITs).
Also fixed a couple of checkstyle issues in the simulators.

Issue-ID: POLICY-2568
Change-Id: Ifad8b3c0c2c0b03cb82da693c2cf5ced44ede105
Signed-off-by: Jim Hahn <jrh3@att.com>

3 files changed, 78 insertions, 18 deletions

diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/GuardSimulatorJaxRs.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/GuardSimulatorJaxRs.java
index 271247542..f915f86d8 100644
--- a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/GuardSimulatorJaxRs.java
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/GuardSimulatorJaxRs.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * simulators
  * ================================================================================
- * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
  * Modifications Copyright (C) 2019 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -23,13 +23,11 @@ package org.onap.policy.simulators;
 
 import java.util.Collections;
 import java.util.Map;
-
 import javax.ws.rs.Consumes;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
-
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
 
diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SoSimulatorJaxRs.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SoSimulatorJaxRs.java
index ed6bce9e0..8e787f8d7 100644
--- a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SoSimulatorJaxRs.java
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SoSimulatorJaxRs.java
@@ -21,16 +21,21 @@
 
 package org.onap.policy.simulators;
 
-import com.google.gson.Gson;
-
+import java.util.Set;
 import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
+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.onap.policy.so.SoRequest;
 import org.onap.policy.so.SoRequestReferences;
 import org.onap.policy.so.SoRequestStatus;
@@ -39,6 +44,25 @@ import org.onap.policy.so.SoResponse;
 
 @Path("/")
 public class SoSimulatorJaxRs {
+    private final Coder coder = new StandardCoder();
+
+    /**
+     * Set of incomplete request IDs. When a POST or DELETE is performed, the new request
+     * ID is added to the set. When the request is polled, the ID is removed and an empty
+     * response is returned. When the request is polled again, it sees that there is no
+     * entry and returns a completion indication.
+     *
+     * <p/>
+     * This is static so request IDs are retained across servlets.
+     */
+    private static final Set<String> incomplete = ConcurrentHashMap.newKeySet();
+
+    /**
+     * {@code True} if the initial request should yield an incomplete, {@code false}
+     * otherwise.  This is used when junit testing the SO actor.
+     */
+    @Setter
+    private static boolean yieldIncomplete = false;
 
     /**
      * SO post query.
@@ -52,8 +76,9 @@ public class SoSimulatorJaxRs {
     @Consumes(MediaType.APPLICATION_JSON)
     @Produces("application/json")
     public String soPostQuery(@PathParam("serviceInstanceId") final String serviceInstanceId,
-                    @PathParam("vnfInstanceId") final String vnfInstanceId) {
-        return makeCompleteSuccess();
+                    @PathParam("vnfInstanceId") final String vnfInstanceId) throws CoderException {
+
+        return coder.encode(yieldIncomplete ? makeIncomplete() : makeComplete(UUID.randomUUID().toString()));
     }
 
     /**
@@ -69,14 +94,52 @@ public class SoSimulatorJaxRs {
     @Produces("application/json")
     public String soDelete(@PathParam("serviceInstanceId") final String serviceInstanceId,
                     @PathParam("vnfInstanceId") final String vnfInstanceId,
-                    @PathParam("vfModuleInstanceId") final String vfModuleInstanceId) {
-        return makeCompleteSuccess();
+                    @PathParam("vfModuleInstanceId") final String vfModuleInstanceId) throws CoderException {
+
+        return coder.encode(yieldIncomplete ? makeIncomplete() : makeComplete(UUID.randomUUID().toString()));
+    }
+
+    /**
+     * Poll SO result.
+     *
+     * @param requestId the ID of the request whose status is to be queried
+     * @return the response
+     */
+    @GET
+    @Path("/orchestrationRequests/v5/{requestId}")
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces("application/json")
+    public String soGetQuery(@PathParam("requestId") final String requestId) throws CoderException {
+        if (incomplete.remove(requestId)) {
+            // first poll - return empty response
+            return coder.encode(new SoResponse());
+
+        } else {
+            return coder.encode(makeComplete(requestId));
+        }
+    }
+
+    private SoResponse makeIncomplete() {
+        final SoResponse response = makeResponse();
+        response.getRequest().getRequestStatus().setRequestState("INCOMPLETE");
+
+        incomplete.add(response.getRequestReferences().getRequestId());
+
+        return response;
+    }
+
+    private SoResponse makeComplete(String requestId) {
+        final SoResponse response = makeResponse();
+
+        response.getRequest().getRequestStatus().setRequestState("COMPLETE");
+        response.getRequest().setRequestId(UUID.fromString(requestId));
+
+        return response;
     }
 
-    private String makeCompleteSuccess() {
+    private SoResponse makeResponse() {
         final SoRequest request = new SoRequest();
         final SoRequestStatus requestStatus = new SoRequestStatus();
-        requestStatus.setRequestState("COMPLETE");
         request.setRequestStatus(requestStatus);
         request.setRequestId(UUID.randomUUID());
 
@@ -89,6 +152,6 @@ public class SoSimulatorJaxRs {
 
         response.setRequest(request);
 
-        return new Gson().toJson(response);
+        return response;
     }
 }
diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/VfcSimulatorJaxRs.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/VfcSimulatorJaxRs.java
index 836db86cc..cf21c7bab 100644
--- a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/VfcSimulatorJaxRs.java
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/VfcSimulatorJaxRs.java
@@ -2,15 +2,15 @@
  * ============LICENSE_START=======================================================
  * simulators
  * ================================================================================
- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
  * Modifications Copyright (C) 2019 Nordix Foundation.
  * ================================================================================
  * 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.
@@ -30,7 +30,6 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.MediaType;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -39,7 +38,7 @@ public class VfcSimulatorJaxRs {
 
     /**
      * VFC post query.
-     * 
+     *
      * @param nsInstanceId the NS instance
      * @param response the response
      * @return the response
@@ -64,7 +63,7 @@ public class VfcSimulatorJaxRs {
 
     /**
      * VFC get query.
-     * 
+     *
      * @param jobId tthe job id
      * @return the response
      */