chore: address NPE while producing messages

address NPE while producing messages

Signed-off-by: neeraj-laad <[email protected]>

Author: neeraj-laad

src/main/java/kafka/vertx/demo/WebSocketServer.java

@@ -11,6 +11,7 @@
 import io.vertx.core.eventbus.EventBus;
 import io.vertx.core.eventbus.MessageConsumer;
 import io.vertx.core.http.HttpServer;
+import io.vertx.core.http.HttpServerOptions;
 import io.vertx.core.http.ServerWebSocket;
 import io.vertx.core.json.JsonObject;
 import io.vertx.ext.web.Router;
@@ -90,7 +91,7 @@ private Future<HttpServer> createRouterAndStartServer(JsonObject config) {
   }
 
   private Future<HttpServer> startWebSocket(Router router) {
-    return vertx.createHttpServer()
+    return vertx.createHttpServer(new HttpServerOptions().setRegisterWebSocketWriteHandlers(true))
       .requestHandler(router)
       .webSocketHandler(this::handleWebSocket)
       .listen(8080)