feat: #8 SecretKeyManagerService - 기밀 데이터 조회 기능

src/main/java/com/t3t/authenticationapi/keymanager/service/SecretKeyManagerService.java

@@ -0,0 +1,59 @@
+package com.t3t.authenticationapi.keymanager.service;
+
+import com.t3t.authenticationapi.exception.SecretKeyManagerApiRequestFailedException;
+import com.t3t.authenticationapi.keymanager.model.response.SecretKeyManagerResponse;
+import com.t3t.authenticationapi.keymanager.properties.SecretKeyManagerProperties;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Profile;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpMethod;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * Secret Key Manager 에 등록된 Secret 값을 가져오기 위한 서비스 클래스
+ *
+ * @author woody35545(구건모)
+ */
+@Profile("!local")
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class SecretKeyManagerService {
+    private final RestTemplate sslRestTemplate;
+    private final SecretKeyManagerProperties secretKeyManagerProperties;
+
+    private static final ParameterizedTypeReference<SecretKeyManagerResponse> secretKeyManagerResponseTypeReference
+            = new ParameterizedTypeReference<SecretKeyManagerResponse>() {
+    };
+
+    /**
+     * Secret Key Manager 에서 Secret 값 조회
+     *
+     * @param keyId 조회할 Key ID(Secret Key Manager 에 등록된 기밀 데이터의 Key ID)
+     * @return Secret Key Manager 에서 조회한 Secret 값을 String 형태로 반환
+     * @author woody35545(구건모)
+     */
+    public String getSecretValue(String keyId) {
+
+        HttpEntity<SecretKeyManagerResponse> response =
+                sslRestTemplate.exchange("https://api-keymanager.nhncloudservice.com/keymanager/v1.0/appkey/{appKey}/secrets/{keyId}",
+                        HttpMethod.GET, null, SecretKeyManagerResponse.class,
+                        secretKeyManagerProperties.getAppKey(), keyId);
+
+        SecretKeyManagerResponse responseBody = response.getBody();
+
+        if (responseBody == null) {
+            throw new SecretKeyManagerApiRequestFailedException("Response body is null.");
+        }
+
+        if (responseBody.getHeader() == null || responseBody.getBody() == null || !responseBody.getHeader().getIsSuccessful().equals("true") || responseBody.getBody().getSecret() == null) {
+            log.error("Secret Key Manager API response: {}", responseBody);
+            throw new SecretKeyManagerApiRequestFailedException(new StringBuilder().append("Fail to request Secret Key Manager API (Key ID:").append(keyId).append(")").toString());
+        }
+
+        return responseBody.getBody().getSecret();
+    }
+}