prepare egvp rest client

src/main/java/de/bund/digitalservice/a2j/config/EgvpClientConfig.java

@@ -0,0 +1,24 @@
+package de.bund.digitalservice.a2j.config;
+
+import de.bund.digitalservice.a2j.service.egvp.EgvpClient;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.DefaultResponseErrorHandler;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class EgvpClientConfig {
+
+  @Bean
+  public EgvpClient egvpClient(@Value("egvp.client.baseUri") String baseUri) {
+    RestTemplate restClient =
+        new RestTemplateBuilder()
+            .errorHandler(new DefaultResponseErrorHandler())
+            .rootUri(baseUri)
+            .build();
+
+    return new EgvpClient(restClient);
+  }
+}

src/main/java/de/bund/digitalservice/a2j/service/egvp/DTO/GetVersionResponse.java

@@ -0,0 +1,3 @@
+package de.bund.digitalservice.a2j.service.egvp.DTO;
+
+public record GetVersionResponse(String version) {}

src/main/java/de/bund/digitalservice/a2j/service/egvp/DTO/ResponseError.java

@@ -0,0 +1,3 @@
+package de.bund.digitalservice.a2j.service.egvp.DTO;
+
+public record ResponseError(String responseCode, String errorDetail, String errorDescription) {}

src/main/java/de/bund/digitalservice/a2j/service/egvp/EgvpClient.java

@@ -0,0 +1,29 @@
+package de.bund.digitalservice.a2j.service.egvp;
+
+import de.bund.digitalservice.a2j.service.egvp.DTO.GetVersionResponse;
+import de.bund.digitalservice.a2j.service.egvp.DTO.ResponseError;
+import java.util.Objects;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.RestTemplate;
+
+public class EgvpClient {
+  private final RestTemplate client;
+
+  public EgvpClient(RestTemplate client) {
+    this.client = client;
+  }
+
+  public GetVersionResponse getVersion() throws EgvpClientException, HttpClientErrorException {
+    try {
+      return this.client.getForEntity("/getVersion", GetVersionResponse.class).getBody();
+    } catch (HttpClientErrorException e) {
+      ResponseError error = e.getResponseBodyAs(ResponseError.class);
+
+      if (Objects.isNull(error)) {
+        throw e;
+      } else {
+        throw new EgvpClientException(error.responseCode());
+      }
+    }
+  }
+}

src/main/java/de/bund/digitalservice/a2j/service/egvp/EgvpClientException.java

@@ -0,0 +1,7 @@
+package de.bund.digitalservice.a2j.service.egvp;
+
+public class EgvpClientException extends RuntimeException {
+  public EgvpClientException(String message) {
+    super(message);
+  }
+}

src/main/resources/application-local.yaml.example

@@ -15,3 +15,6 @@ fitConnect:
       name: Simple Dummy Service
     jsonUri: https://schema.fitko.de/fim/s17000717_1.0.schema.json
   callbackSecret: s3cr3t
+egvp:
+  client:
+    baseUri: "localhost:8088"

src/test/java/de/bund/digitalservice/a2j/integration/EgvpClientIntegrationTest.java

@@ -0,0 +1,56 @@
+package de.bund.digitalservice.a2j.integration;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.springframework.test.web.client.match.MockRestRequestMatchers.requestTo;
+import static org.springframework.test.web.client.response.MockRestResponseCreators.withSuccess;
+
+import de.bund.digitalservice.a2j.service.egvp.DTO.GetVersionResponse;
+import de.bund.digitalservice.a2j.service.egvp.EgvpClient;
+import de.bund.digitalservice.a2j.service.egvp.EgvpClientException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.client.MockRestServiceServer;
+import org.springframework.web.client.RestTemplate;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@Tag("integration")
+public class EgvpClientIntegrationTest {
+
+  private EgvpClient client;
+
+  private MockRestServiceServer mockServer;
+
+  @BeforeEach
+  void setup() {
+    RestTemplate restTemplate = new RestTemplateBuilder().rootUri("http://localhost:8088").build();
+    this.client = new EgvpClient(restTemplate);
+    this.mockServer = MockRestServiceServer.createServer(restTemplate);
+  }
+
+  @Test
+  void getVersion() {
+    mockServer
+        .expect(requestTo("http://localhost:8088/getVersion"))
+        .andRespond(
+            withSuccess(
+                """
+                        {
+                            "version":"6.0.1"
+                        }
+                        """,
+                MediaType.APPLICATION_JSON));
+    GetVersionResponse res = null;
+
+    try {
+      res = client.getVersion();
+    } catch (EgvpClientException e) {
+      throw new RuntimeException(e);
+    }
+
+    assertEquals(new GetVersionResponse("6.0.1"), res);
+  }
+}