Bug fixes in models simulators

Fixed these issues:
- topics weren't started
- appc topics were reversed
- prevent appc simulator from responding to a response (i.e., infinite
  loop)

Issue-ID: POLICY-2434
Signed-off-by: Jim Hahn <jrh3@att.com>
Change-Id: I1f43be72d35f874fec98f48f1a112c055c00eee5

1 files changed, 36 insertions, 29 deletions

diff --git a/models-sim/policy-models-simulators/src/main/java/org/onap/policy/models/simulators/Main.java b/models-sim/policy-models-simulators/src/main/java/org/onap/policy/models/simulators/Main.java
index 8333800f3..a0b165564 100644
--- a/models-sim/policy-models-simulators/src/main/java/org/onap/policy/models/simulators/Main.java
+++ b/models-sim/policy-models-simulators/src/main/java/org/onap/policy/models/simulators/Main.java
@@ -22,7 +22,9 @@ package org.onap.policy.models.simulators;
 
 import java.io.FileNotFoundException;
 import java.lang.reflect.InvocationTargetException;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.atomic.AtomicReference;
 import lombok.AccessLevel;
@@ -85,9 +87,8 @@ public class Main extends ServiceManagerContainer {
         AtomicReference<DmaapSimProvider> provRef = new AtomicReference<>();
         addAction(provName, () -> provRef.set(buildDmaapProvider(dmaapProv)), () -> provRef.get().shutdown());
 
-        // @formatter:off
-
         // REST server simulators
+        // @formatter:off
         for (ClassRestServerParameters restsim : params.getRestServers()) {
             AtomicReference<HttpServletServer> ref = new AtomicReference<>();
             addAction(restsim.getName(),
@@ -98,23 +99,30 @@ public class Main extends ServiceManagerContainer {
         // NOTE: topics must be started AFTER the (dmaap) rest servers
 
         // topic sinks
-        AtomicReference<List<TopicSink>> sinkRef = new AtomicReference<>();
-        addAction("topic sinks", () -> sinkRef.set(buildSinks(params.getTopicSinks())),
-            () -> shutdownSinks(sinkRef.get()));
+        Map<String, TopicSink> sinks = new HashMap<>();
+        for (TopicParameters topicParams : params.getTopicSinks()) {
+            String topic = topicParams.getTopic();
+            addAction("Sink " + topic,
+                () -> sinks.put(topic, startSink(topicParams)),
+                () -> sinks.get(topic).shutdown());
+        }
 
         // topic sources
-        AtomicReference<List<TopicSource>> sourceRef = new AtomicReference<>();
-        addAction("topic sources", () -> sourceRef.set(buildSources(params.getTopicSources())),
-            () -> shutdownSources(sourceRef.get()));
+        Map<String, TopicSource> sources = new HashMap<>();
+        for (TopicParameters topicParams : params.getTopicSources()) {
+            String topic = topicParams.getTopic();
+            addAction("Source " + topic,
+                () -> sources.put(topic, startSource(topicParams)),
+                () -> sources.get(topic).shutdown());
+        }
 
         // topic server simulators
         for (TopicServerParameters topicsim : params.getTopicServers()) {
             AtomicReference<TopicServer<?>> ref = new AtomicReference<>();
             addAction(topicsim.getName(),
-                () -> ref.set(buildTopicServer(topicsim, sinkRef.get(), sourceRef.get())),
+                () -> ref.set(buildTopicServer(topicsim, sinks, sources)),
                 () -> ref.get().shutdown());
         }
-
         // @formatter:on
     }
 
@@ -164,20 +172,16 @@ public class Main extends ServiceManagerContainer {
         return prov;
     }
 
-    protected List<TopicSink> buildSinks(List<TopicParameters> params) {
-        return TopicEndpointManager.getManager().addTopicSinks(params);
+    private TopicSink startSink(TopicParameters params) {
+        TopicSink sink = TopicEndpointManager.getManager().addTopicSinks(List.of(params)).get(0);
+        sink.start();
+        return sink;
     }
 
-    private void shutdownSinks(List<TopicSink> sinks) {
-        sinks.forEach(TopicSink::shutdown);
-    }
-
-    protected List<TopicSource> buildSources(List<TopicParameters> params) {
-        return TopicEndpointManager.getManager().addTopicSources(params);
-    }
-
-    private void shutdownSources(List<TopicSource> sources) {
-        sources.forEach(TopicSource::shutdown);
+    private TopicSource startSource(TopicParameters params) {
+        TopicSource source = TopicEndpointManager.getManager().addTopicSources(List.of(params)).get(0);
+        source.start();
+        return source;
     }
 
     private HttpServletServer buildRestServer(String dmaapName, ClassRestServerParameters params) {
@@ -201,17 +205,20 @@ public class Main extends ServiceManagerContainer {
         }
     }
 
-    private TopicServer<?> buildTopicServer(TopicServerParameters params, List<TopicSink> sinks,
-                    List<TopicSource> sources) {
+    private TopicServer<?> buildTopicServer(TopicServerParameters params, Map<String, TopicSink> sinks,
+                    Map<String, TopicSource> sources) {
         try {
             // find the desired sink
-            TopicSink sink = sinks.stream().filter(sink2 -> sink2.getTopic().equals(params.getSink())).findAny()
-                            .orElseThrow(() -> new IllegalArgumentException("invalid sink topic " + params.getSink()));
+            TopicSink sink = sinks.get(params.getSink());
+            if (sink == null) {
+                throw new IllegalArgumentException("invalid sink topic " + params.getSink());
+            }
 
             // find the desired source
-            TopicSource source = sources.stream().filter(source2 -> source2.getTopic().equals(params.getSource()))
-                            .findAny().orElseThrow(() -> new IllegalArgumentException(
-                                            "invalid source topic " + params.getSource()));
+            TopicSource source = sources.get(params.getSource());
+            if (source == null) {
+                throw new IllegalArgumentException("invalid source topic " + params.getSource());
+            }
 
             // create the topic server
             return (TopicServer<?>) Class.forName(params.getProviderClass())