content: package com.service;
  
  import org.json.JSONObject;
  
  import java.io.IOException;
  import java.net.URI;
  import java.net.http.HttpClient;
  import java.net.http.HttpRequest;
  import java.net.http.HttpResponse;
  import java.time.Duration;
  import java.util.concurrent.TimeUnit;
  
  public class CheckoutServiceApplication {
  	private static final HttpClient httpClient = HttpClient.newBuilder()
  			.version(HttpClient.Version.HTTP_2)
  			.connectTimeout(Duration.ofSeconds(10))
  			.build();
  
  	private static final String DAPR_HTTP_PORT = System.getenv().getOrDefault("DAPR_HTTP_PORT", "3500");
  
  	public static void main(String[] args) throws InterruptedException, IOException {
  		String dapr_url = "http://localhost:"+DAPR_HTTP_PORT+"/orders";
  		for (int i=1; i<=10; i++) {
  			int orderId = i;
  			JSONObject obj = new JSONObject();
  			obj.put("orderId", orderId);
  
  			HttpRequest request = HttpRequest.newBuilder()
  					.POST(HttpRequest.BodyPublishers.ofString(obj.toString()))
  					.uri(URI.create(dapr_url))
  					.header("Content-Type", "application/json")
  					.header("dapr-app-id", "order-processor")
  					.build();
  
  			HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
  			System.out.println("Order passed: "+ orderId);
  			TimeUnit.MILLISECONDS.sleep(1000);
  		}
  	}
  }
  