apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
  name: checkout
spec:
  type: bindings.kafka
  version: v1
  metadata:
  # Kafka broker 连接设置
  - name: brokers
    value: localhost:9092
  # consumer 配置：topic 和 consumer group
  - name: topics
    value: sample
  - name: consumerGroup
    value: group1
  # publisher 配置：topic
  - name: publishTopic
    value: sample
  - name: authRequired
    value: false
  - name: direction
    value: input

//dependencies
import org.springframework.web.bind.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Mono;

//code
@RestController
@RequestMapping("/")
public class CheckoutServiceController {
    private static final Logger log = LoggerFactory.getLogger(CheckoutServiceController.class);
        @PostMapping(path = "/checkout")
        public Mono<String> getCheckout(@RequestBody(required = false) byte[] body) {
            return Mono.fromRunnable(() ->
                    log.info("Received Message: " + new String(body)));
        }
}

#dependencies
import logging
from dapr.ext.grpc import App, BindingRequest

#code
app = App()

@app.binding('checkout')
def getCheckout(request: BindingRequest):
    logging.basicConfig(level = logging.INFO)
    logging.info('Received Message : ' + request.text())

app.run(6002)

//dependencies
import (
	"encoding/json"
	"log"
	"net/http"
	"github.com/gorilla/mux"
)

//code
func getCheckout(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	var orderId int
	err := json.NewDecoder(r.Body).Decode(&orderId)
	log.Println("Received Message: ", orderId)
	if err != nil {
		log.Printf("error parsing checkout input binding payload: %s", err)
		w.WriteHeader(http.StatusOK)
		return
	}
}

func main() {
	r := mux.NewRouter()
	r.HandleFunc("/checkout", getCheckout).Methods("POST", "OPTIONS")
	http.ListenAndServe(":6002", r)
}

//dependencies 
import { DaprServer, CommunicationProtocolEnum } from '@dapr/dapr'; 

//code
const daprHost = "127.0.0.1"; 
const serverHost = "127.0.0.1";
const serverPort = "6002"; 
const daprPort = "3602"; 

start().catch((e) => {
    console.error(e);
    process.exit(1);
});

async function start() {
    const server = new DaprServer({
        serverHost,
        serverPort,
        communicationProtocol: CommunicationProtocolEnum.HTTP,
        clientOptions: {
            daprHost,
            daprPort, 
        }
    });
    await server.binding.receive('checkout', async (orderId) => console.log(`Received Message: ${JSON.stringify(orderId)}`));
    await server.start();
}

apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
  name: checkout
spec:
  type: bindings.kafka
  version: v1
  metadata:
  # Kafka broker 连接设置
  - name: brokers
    value: localhost:9092
  # 消费者配置：主题和消费者组
  - name: topics
    value: sample
  - name: consumerGroup
    value: group1
  # 发布者配置：主题
  - name: publishTopic
    value: sample
  - name: authRequired
    value: false
  - name: direction
    value: output

//dependencies
import io.dapr.client.DaprClient;
import io.dapr.client.DaprClientBuilder;
import io.dapr.client.domain.HttpExtension;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Random;
import java.util.concurrent.TimeUnit;

//code
@SpringBootApplication
public class OrderProcessingServiceApplication {

	private static final Logger log = LoggerFactory.getLogger(OrderProcessingServiceApplication.class);

	public static void main(String[] args) throws InterruptedException{
		String BINDING_NAME = "checkout";
		String BINDING_OPERATION = "create";
		while(true) {
			TimeUnit.MILLISECONDS.sleep(5000);
			Random random = new Random();
			int orderId = random.nextInt(1000-1) + 1;
			DaprClient client = new DaprClientBuilder().build();
          //使用 Dapr SDK 调用输出绑定
			client.invokeBinding(BINDING_NAME, BINDING_OPERATION, orderId).block();
			log.info("Sending message: " + orderId);
		}
	}
}

#dependencies
import random
from time import sleep    
import requests
import logging
import json
from dapr.clients import DaprClient

#code
logging.basicConfig(level = logging.INFO)
BINDING_NAME = 'checkout'
BINDING_OPERATION = 'create' 
while True:
    sleep(random.randrange(50, 5000) / 1000)
    orderId = random.randint(1, 1000)
    with DaprClient() as client:
        #使用 Dapr SDK 调用输出绑定
        resp = client.invoke_binding(BINDING_NAME, BINDING_OPERATION, json.dumps(orderId))
    logging.basicConfig(level = logging.INFO)
    logging.info('Sending message: ' + str(orderId))
    

//dependencies
import (
	"context"
	"log"
	"math/rand"
	"time"
	"strconv"
	dapr "github.com/dapr/go-sdk/client"

)

//code
func main() {
	BINDING_NAME := "checkout";
	BINDING_OPERATION := "create";
	for i := 0; i < 10; i++ {
		time.Sleep(5000)
		orderId := rand.Intn(1000-1) + 1
		client, err := dapr.NewClient()
		if err != nil {
			panic(err)
		}
		defer client.Close()
		ctx := context.Background()
        //使用 Dapr SDK 调用输出绑定
		in := &dapr.InvokeBindingRequest{ Name: BINDING_NAME, Operation: BINDING_OPERATION , Data: []byte(strconv.Itoa(orderId))}
		err = client.InvokeOutputBinding(ctx, in)
		log.Println("Sending message: " + strconv.Itoa(orderId))
	}
}
    

//dependencies
import { DaprClient, CommunicationProtocolEnum } from "@dapr/dapr";

//code
const daprHost = "127.0.0.1";

(async function () {
    for (var i = 0; i < 10; i++) {
        await sleep(2000);
        const orderId = Math.floor(Math.random() * (1000 - 1) + 1);
        try {
            await sendOrder(orderId)
        } catch (err) {
            console.error(e);
            process.exit(1);
        }
    }
})();

async function sendOrder(orderId) {
    const BINDING_NAME = "checkout";
    const BINDING_OPERATION = "create";
    const client = new DaprClient({
        daprHost,
        daprPort: process.env.DAPR_HTTP_PORT,
        communicationProtocol: CommunicationProtocolEnum.HTTP,
    });
    //使用 Dapr SDK 调用输出绑定
    const result = await client.binding.send(BINDING_NAME, BINDING_OPERATION, orderId);
    console.log("Sending message: " + orderId);
}

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}