master- Sync Repo

src/main/java/de/kreuzwerker/cdc/messagingapp/UserServiceClient.java

@@ -0,0 +1,24 @@
+package de.kreuzwerker.cdc.messagingapp;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.stereotype.Component;
+import org.springframework.util.Assert;
+import org.springframework.web.client.RestTemplate;
+
+@Component
+public class UserServiceClient {
+
+    private final RestTemplate restTemplate;
+
+    public UserServiceClient(@Value("${user-service.base-url}") String baseUrl) {
+        this.restTemplate = new RestTemplateBuilder().rootUri(baseUrl).build();
+    }
+
+    public User getUser(String id) {
+        final User user = restTemplate.getForObject("/users/" + id, User.class);
+        Assert.hasText(user.getName(), "Name is blank.");
+        return user;
+    }
+
+}