Fix for Kafka Consumer is not safe error

Pre create a dummy topic and subscribe to it during first POST call for
posting a message to create __consumer_offsets topic

Issue-ID: DMAAP-896
Change-Id: I11f3f9b8764232bc7d4e9bb270d5d73fc280cb80
Signed-off-by: sunil unnava <sunil.unnava@att.com>

1 files changed, 25 insertions, 1 deletions

diff --git a/src/main/java/org/onap/dmaap/service/EventsRestService.java b/src/main/java/org/onap/dmaap/service/EventsRestService.java
index 2672261..b4aee10 100644
--- a/src/main/java/org/onap/dmaap/service/EventsRestService.java
+++ b/src/main/java/org/onap/dmaap/service/EventsRestService.java
@@ -96,6 +96,8 @@ public class EventsRestService {
 
 	@Autowired
 	private DMaaPErrorMessages errorMessages;
+	
+	private boolean isOffsetTopicCreated=false;
 
 	/**
 	 * This method is used to consume messages.Taking three parameter
@@ -254,7 +256,10 @@ public class EventsRestService {
 	public void pushEvents(@PathParam("topic") String topic, InputStream msg,
 			@QueryParam("partitionKey") String partitionKey) throws CambriaApiException {
 		log.info("Publishing message to topic " + topic);
-
+            
+	       if(!isOffsetTopicCreated){
+	    	   preCreateOffsetTopic(msg);   
+	       }
 		try {
 			eventsService.pushEvents(getDmaapContext(), topic, msg, partitionKey, null);
 		} 
@@ -313,8 +318,14 @@ public class EventsRestService {
 			@QueryParam("partitionKey") String partitionKey) throws CambriaApiException {
 		// log.info("Publishing message with transaction id for topic " + topic
 		// );
+		
 
 		try {
+			
+			if(!isOffsetTopicCreated){
+		    	preCreateOffsetTopic(request.getInputStream());   
+		      }
+			
 			eventsService.pushEvents(getDmaapContext(), topic, request.getInputStream(), 
 					partitionKey,
 					Utils.getFormattedDate(new Date()));
@@ -374,5 +385,18 @@ public class EventsRestService {
 
 		return dmaapContext;
 	}
+	
+	private void preCreateOffsetTopic(InputStream msg) {
+
+		try {
+			eventsService.pushEvents(getDmaapContext(), "DUMMY_TOPIC", msg, null, null);
+			eventsService.getEvents(getDmaapContext(), "DUMMY_TOPIC", "CG1", "C1");
+			isOffsetTopicCreated = true;
+		} catch (CambriaApiException | ConfigDbException | AccessDeniedException | TopicExistsException | IOException
+				| missingReqdSetting | UnavailableException e) {
+			log.error("Error while creating the dummy topic", e);
+		}
+
+	}
 
 }
\ No newline at end of file