build: example vertx standalone app

Author: jknack

tests/src/test/java/examples/vertx/VertxStandaloneApp.java

@@ -0,0 +1,42 @@
+/*
+ * Jooby https://jooby.io
+ * Apache License Version 2.0 https://jooby.io/LICENSE.txt
+ * Copyright 2014 Edgar Espina
+ */
+package examples.vertx;
+
+import io.vertx.core.Vertx;
+import io.vertx.core.http.HttpServer;
+
+public class VertxStandaloneApp {
+  public static void main(String[] args) {
+    // Create a Vert.x instance
+    Vertx vertx = Vertx.vertx();
+
+    // Create the HTTP server
+    HttpServer server = vertx.createHttpServer();
+
+    // Attach a single request handler for all incoming requests
+    server.requestHandler(
+        request -> {
+          var response = request.response();
+          response.putHeader("content-type", "text/plain");
+
+          // Check the request path to determine the response
+          if (request.path().equals("/hello")) {
+            response.end("Hello from Vert.x core!");
+          } else if (request.path().equals("/about")) {
+            response.end("This is a simple server using only vertx-core.");
+          } else {
+            response.setStatusCode(404);
+            response.end("Not Found");
+          }
+        });
+
+    // Start the server and listen on port 8080
+    server
+        .listen(8080)
+        .onSuccess(s -> System.out.println("HTTP server started on port " + s.actualPort()))
+        .onFailure(t -> t.printStackTrace());
+  }
+}