Use service discovery to call APIs

invoicing-service/src/main/java/org/example/resources/ExternalAPI.java

@@ -3,8 +3,6 @@ package org.example.resources;
 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;
 import org.example.models.Invoice;
-import org.springframework.web.bind.annotation.PathVariable;
-
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;

users-service/pom.xml

@@ -24,7 +24,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
@@ -64,8 +63,4 @@
             </snapshots>
         </repository>
     </repositories>
-
-
-
-
 </project>
\ No newline at end of file

users-service/src/main/java/org/example/UsersServiceApplication.java

@@ -2,6 +2,7 @@ package org.example;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 import org.springframework.context.annotation.Bean;
 import org.springframework.web.client.RestTemplate;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@@ -13,6 +14,7 @@ public class UsersServiceApplication {
         SpringApplication.run(UsersServiceApplication.class, args);
     }
     @Bean
+    @LoadBalanced
     public RestTemplate getRestTemplate(){
         return new RestTemplate();
     }

users-service/src/main/java/org/example/resources/UserResource.java

@@ -24,10 +24,10 @@ public class UserResource {
     @PostMapping("/payInvoice/{userId}/{invoiceId}")
     public boolean payInvoice(@PathVariable("userId") String userId,@PathVariable("invoiceId") String invoiceId){
         User user = new User(userId,"Ali",5000.0);
-        Invoice invoice = restTemplate.getForObject("http://localhost:8081/invoices/getInvoiceDetails/" + invoiceId, Invoice.class);
+        Invoice invoice = restTemplate.getForObject("http://invoicing-service/invoices/getInvoiceDetails/" + invoiceId, Invoice.class);
         if(user.getBalance() >= invoice.getValue()){
             user.setBalance(user.getBalance() - invoice.getValue());
-            String url = "http://localhost:8081/invoices/updateInvoiceStatus/" + invoiceId;
+            String url = "http://invoicing-service/invoices/updateInvoiceStatus/" + invoiceId;
             ResponseEntity<Boolean> response = restTemplate.exchange(url, HttpMethod.POST, null, Boolean.class);
             boolean status = response.getBody();
             return status;
@@ -39,7 +39,7 @@ public class UserResource {
     }
     @GetMapping("/getAllUsersHaveUnPaidInvoices")
     public HashMap<User,Invoice> getAllUsersHaveUnPaidInvoices(){
-        List<Invoice> invoices = Arrays.asList(restTemplate.getForObject("http://localhost:8081/invoices/getUnPaidInvoices", Invoice[].class));
+        List<Invoice> invoices = Arrays.asList(restTemplate.getForObject("http://invoicing-service/invoices/getUnPaidInvoices", Invoice[].class));
         HashMap<User,Invoice> userInvoiceHashMap = new HashMap<>();
         for (Invoice invoice: invoices)
         {
@@ -57,7 +57,7 @@ public class UserResource {
     public HashMap<User,Invoice> getAllUsersHavePaidInvoices(){
 
         HashMap<User,Invoice> userInvoiceHashMap = new HashMap<>();
-        List<Invoice> invoices = Arrays.asList(restTemplate.getForObject("http://localhost:8081/invoices/getPaidInvoices", Invoice[].class));
+        List<Invoice> invoices = Arrays.asList(restTemplate.getForObject("http://invoicing-service/invoices/getPaidInvoices", Invoice[].class));
 
         for (Invoice invoice: invoices)
         {