testing inter service communication

Signed-off-by: Peter Siegmund <developer@mars3142.org>

src/main/java/dev/mars3142/fhq/config/RestClientConfig.java

@@ -0,0 +1,38 @@
+package dev.mars3142.fhq.config;
+
+import dev.mars3142.fhq.client.TimeZoneClient;
+import org.springframework.boot.web.client.ClientHttpRequestFactories;
+import org.springframework.boot.web.client.ClientHttpRequestFactorySettings;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.support.RestClientAdapter;
+import org.springframework.web.service.invoker.HttpServiceProxyFactory;
+
+@Configuration
+public class RestClientConfig {
+
+  @LoadBalanced
+  @Bean
+  RestClient.Builder restClientBuilder() {
+    return RestClient.builder();
+  }
+
+  @Bean
+  public TimeZoneClient timeZoneClient(RestClient.Builder restClientBuilder) {
+    RestClient restClient = restClientBuilder
+        .baseUrl("http://timezone-service")
+        .requestFactory(getClientRequestFactory())
+        .build();
+    var restClientAdapter = RestClientAdapter.create(restClient);
+    var httpServiceProxyFactory = HttpServiceProxyFactory.builderFor(restClientAdapter).build();
+    return httpServiceProxyFactory.createClient(TimeZoneClient.class);
+  }
+
+  private ClientHttpRequestFactory getClientRequestFactory() {
+    ClientHttpRequestFactorySettings clientHttpRequestFactorySettings = ClientHttpRequestFactorySettings.DEFAULTS;
+    return ClientHttpRequestFactories.get(clientHttpRequestFactorySettings);
+  }
+}