Added ack messages once received in pubsub

pub_sub/csharp/CheckoutService/Controllers/CheckoutServiceController.cs

@@ -2,6 +2,8 @@ using System.Collections.Generic;
 using System.Threading.Tasks;
 using System;
 using Microsoft.AspNetCore.Mvc;
+using System.Net.Http;
+using System.Net;
 using Dapr;
 using Dapr.Client;
 
@@ -12,9 +14,10 @@ namespace CheckoutService.controller
     {
         [Topic("order_pub_sub", "orders")]
         [HttpPost("checkout")]
-        public void getCheckout([FromBody] int orderId)
+        public HttpResponseMessage getCheckout([FromBody] int orderId)
         {
             Console.WriteLine("Subscriber received : " + orderId);
+            return new HttpResponseMessage(HttpStatusCode.OK);
         }
     }
 }

pub_sub/go/CheckoutService/CheckoutService.go

@@ -1,9 +1,10 @@
 package main
 
 import (
+	"context"
+	"encoding/json"
 	"log"
 	"net/http"
-	"context"
 
 	"github.com/dapr/go-sdk/service/common"
 	daprd "github.com/dapr/go-sdk/service/http"
@@ -17,6 +18,7 @@ var sub = &common.Subscription{
 
 func main() {
 	s := daprd.NewService(":6002")
+	http.HandleFunc("/checkout", handleRequest)
 	if err := s.AddTopicEventHandler(sub, eventHandler); err != nil {
 		log.Fatalf("error adding topic subscription: %v", err)
 	}
@@ -28,4 +30,17 @@ func main() {
 func eventHandler(ctx context.Context, e *common.TopicEvent) (retry bool, err error) {
 	log.Printf("Subscriber received: %s", e.Data)
 	return false, nil
-}
+}
+
+func handleRequest(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(200)
+	w.Header().Set("Content-Type", "application/json")
+	resp := make(map[string]string)
+	resp["message"] = "Status Ok"
+	jsonResp, err := json.Marshal(resp)
+	if err != nil {
+		log.Fatalf("Error happened in JSON marshal. Err: %s", err)
+	}
+	w.Write(jsonResp)
+	return
+}

pub_sub/java/CheckoutService/src/main/java/com/service/CheckoutService/controller/CheckoutServiceController.java

@@ -3,6 +3,8 @@ package com.service.CheckoutService.controller;
 import io.dapr.Topic;
 import io.dapr.client.domain.CloudEvent;
 
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
@@ -18,10 +20,12 @@ public class CheckoutServiceController {
 
     @Topic(name = "orders", pubsubName = "order_pub_sub")
     @PostMapping(path = "/checkout")
-    public Mono<Void> getCheckout(@RequestBody(required = false) CloudEvent<String> cloudEvent) {
-        return Mono.fromRunnable(() -> {
+    public Mono<ResponseEntity> getCheckout(@RequestBody(required = false) CloudEvent<String> cloudEvent) {
+        return Mono.fromSupplier(() -> {
             try {
                 log.info("Subscriber received: " + cloudEvent.getData());
+                return new ResponseEntity<>("successful",
+                        HttpStatus.OK);
             } catch (Exception e) {
                 throw new RuntimeException(e);
             }

pub_sub/javascript/CheckoutService/server.js

@@ -9,7 +9,7 @@ start().catch((e) => {
     process.exit(1);
 });
 
-async function start(orderId) {
+async function start(orderId, response) {
     const PUBSUB_NAME = "order_pub_sub"
 	const TOPIC_NAME  = "orders"
     const server = new DaprServer(
@@ -19,8 +19,10 @@ async function start(orderId) {
         process.env.DAPR_HTTP_PORT, 
         CommunicationProtocolEnum.HTTP
      );
-    await server.pubsub.subscribe(PUBSUB_NAME, TOPIC_NAME, async (orderId) => {
+     await server.pubsub.subscribe(PUBSUB_NAME, TOPIC_NAME, async (orderId) => {
         console.log(`Subscriber received: ${JSON.stringify(orderId)}`)
+    }, (response) => {
+        response.sendStatus(200);
     });
     await server.startServer();
-}
+}

pub_sub/python/CheckoutService.py

@@ -12,5 +12,6 @@ logging.basicConfig(level = logging.INFO)
 def mytopic(event: v1.Event) -> None:
     data = json.loads(event.Data())
     logging.info('Subscriber received: ' + str(data))
+    return '', 200
 
 app.run(6002)