diff --git a/modules/swagger-codegen/src/main/resources/JavaVertXServer/MainApiVerticle.mustache b/modules/swagger-codegen/src/main/resources/JavaVertXServer/MainApiVerticle.mustache
index 9f834d4e6441..050cb6d57ebe 100644
--- a/modules/swagger-codegen/src/main/resources/JavaVertXServer/MainApiVerticle.mustache
+++ b/modules/swagger-codegen/src/main/resources/JavaVertXServer/MainApiVerticle.mustache
@@ -19,10 +19,19 @@ import io.vertx.core.Vertx;
 import io.vertx.ext.web.Router;
 
 public class MainApiVerticle extends AbstractVerticle {
-    final static Logger LOGGER = LoggerFactory.getLogger(MainApiVerticle.class); 
-    
+    final static Logger LOGGER = LoggerFactory.getLogger(MainApiVerticle.class);
+
+    private int serverPort = {{serverPort}};
     protected Router router;
 
+    public int getServerPort() {
+        return serverPort;
+    }
+
+    public void setServerPort(int serverPort) {
+        this.serverPort = serverPort;
+    }
+
     @Override
     public void init(Vertx vertx, Context context) {
         super.init(vertx, context);
@@ -37,13 +46,18 @@ public class MainApiVerticle extends AbstractVerticle {
             if (readFile.succeeded()) {
                 Swagger swagger = new SwaggerParser().parse(readFile.result().toString(Charset.forName("utf-8")));
                 Router swaggerRouter = SwaggerRouter.swaggerRouter(router, swagger, vertx.eventBus(), new OperationIdServiceIdResolver());
-            
+
                 deployVerticles(startFuture);
-                
-                vertx.createHttpServer() 
+
+                vertx.createHttpServer()
                     .requestHandler(swaggerRouter::accept) 
-                    .listen({{serverPort}});
-                startFuture.complete();
+                    .listen(serverPort, h -> {
+                        if (h.succeeded()) {
+                            startFuture.complete();
+                        } else {
+                            startFuture.fail(h.cause());
+                        }
+                    });
             } else {
             	startFuture.fail(readFile.cause());
             }