HttpClient for nodes, registration to Discovery

SymphonyDatabaseNode/src/main/java/io/github/lumijiez/Main.java

@@ -4,14 +4,33 @@ import jakarta.persistence.EntityManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.LogManager;
 
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+
 public class Main {
     public static Logger logger = LogManager.getLogger(Main.class);
 
-    public static void main(String[] args) {
+    public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException {
+        HttpClient client = HttpClient.newHttpClient();
+
         logger.info("Node up.");
         EntityManager em = Data.getEntityManager();
 
         logger.info("Connected to database: << symphony >>");
         em.close();
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(new URI("http://symphony-discovery:8083/check"))
+                .build();
+
+        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+
+        if (response.statusCode() == 200) {
+            logger.info("Node successfully registered to Discovery");
+        }
     }
 }