Catch empty response from DmaaP

Change-Id: Ibd8739c3f9718eec15ff20e0b88d0bfcd4f6d84d
Issue-ID: DCAEGEN2-540
Signed-off-by: wasala <przemyslaw.wasala@nokia.com>

2 files changed, 9 insertions, 6 deletions

diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/service/DmaapConsumerJsonParser.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/service/DmaapConsumerJsonParser.java
index 3bac7c36..ab4ec633 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/service/DmaapConsumerJsonParser.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/service/DmaapConsumerJsonParser.java
@@ -40,14 +40,15 @@ public class DmaapConsumerJsonParser {
     private static final String PNF_VENDOR_NAME = "pnfVendorName";
     private static final String PNF_SERIAL_NUMBER = "pnfSerialNumber";
 
-    public ConsumerDmaapModel getJsonObject(String message) throws DmaapNotFoundException {
+    public Optional<ConsumerDmaapModel> getJsonObject(String message) throws DmaapNotFoundException {
         JsonElement jsonElement = new JsonParser().parse(message);
         if (jsonElement.isJsonObject()) {
-            return create(jsonElement.getAsJsonObject());
+            return Optional.of(create(jsonElement.getAsJsonObject()));
         } else {
-            return create(StreamSupport.stream(jsonElement.getAsJsonArray().spliterator(), false).findFirst()
-                .flatMap(this::getJsonObjectFromAnArray)
-                .orElseThrow(() -> new DmaapNotFoundException("Json object not found in json array")));
+            return Optional
+                .of(create(StreamSupport.stream(jsonElement.getAsJsonArray().spliterator(), false).findFirst()
+                    .flatMap(this::getJsonObjectFromAnArray)
+                    .orElse(null)));
         }
     }
 
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java
index 01b85a9d..9d818366 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java
@@ -60,7 +60,9 @@ public class DmaapConsumerTaskImpl extends
     @Override
     ConsumerDmaapModel consume(String message) throws DmaapNotFoundException {
         logger.trace("Method called with arg {}", message);
-        return dmaapConsumerJsonParser.getJsonObject(message);
+        return dmaapConsumerJsonParser.getJsonObject(message)
+            .orElseThrow(() -> new DmaapNotFoundException(String.format("Nothing to consume from DmaaP %s topic.",
+                resolveConfiguration().dmaapTopicName())));
     }
 
     @Override