feign_client_impl | Update the requested changes in PR comments.

auth_token_generator/src/main/java/io/entgra/auth_token_getter/service/TokenService.java

@@ -60,8 +60,8 @@ public class TokenService {
     @Value("${refresh-token}")
     private String refreshToken;
 
-    @Value("${jwt-token}")
+//    @Value("${jwt-token}")
-    private String jwtToken;
+//    private String jwtToken;
 
     @Value("${saml2-assertion}")
     private String saml2Assertion;
@@ -100,11 +100,6 @@ public class TokenService {
 
         switch (grantType) {
 
-            case "implicit":
-                return createErrorResponse(501,
-                        "Not Implemented",
-                        "Implicit grant type not handled directly.");
-
             case "password":
                 authHeader = "Basic " + encodedAuth;
                 body = "grant_type=" + grantType + "&username=" + userName + "&password=" + password + "&scope=" + scope;
@@ -120,10 +115,10 @@ public class TokenService {
                 body = "grant_type=refresh_token&refresh_token=" + refreshToken;
                 break;
 
-            case "urn:ietf:params:oauth:grant-type:jwt-bearer":
+//            case "urn:ietf:params:oauth:grant-type:jwt-bearer":
-                authHeader = "Basic " + encodedAuth;
+//                authHeader = "Basic " + encodedAuth;
-                body = "grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion=" + jwtToken;
+//                body = "grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion=" + jwtToken;
-                break;
+//                break;
 
             case "urn:ietf:params:oauth:grant-type:saml2-bearer":
                 authHeader = "Basic " + encodedAuth;
@@ -151,9 +146,9 @@ public class TokenService {
             if (response != null) {
                 String accessToken = response.get("access_token");
                 if (accessToken != null) {
-                    tokenDataHolder.setAccess_token(accessToken);
+                    tokenDataHolder.setAccessToken(accessToken);
-                    tokenDataHolder.setToken_type(response.get("token_type"));
+                    tokenDataHolder.setTokenType(response.get("token_type"));
-                    tokenDataHolder.setExpires_in(Integer.parseInt(response.get("expires_in")));
+                    tokenDataHolder.setExpiresIn(Integer.parseInt(response.get("expires_in")));
                     tokenDataHolder.setScope(response.get("scope"));
                     log.info("Access token stored in the DataHolder");
                     return accessToken;
@@ -165,10 +160,24 @@ public class TokenService {
                 }
             }
         } catch (FeignException e) {
-            log.error("Error while fetching token:{}", e.getMessage());
+            String errorMessage = e.getMessage();
+
+            if (errorMessage != null && errorMessage.contains("[401]")) {
+                log.error("Client credentials or client secret is incorrect: {}", errorMessage);
+                return createErrorResponse(500,
+                        "Client Credentials Error",
+                        "Client credentials or client secret is incorrect.");
+            } else if (errorMessage.contains("Connection refused")) {
+                log.error("Resource server is not working: {}", errorMessage);
+                return createErrorResponse(500,
+                        "Resource Server Error",
+                        "Resource server is not working.");
+            } else {
+                log.error("Error while fetching token: {}", errorMessage);
                 return createErrorResponse(500,
                         "Feign Client Error",
-                    e.getMessage());
+                        errorMessage);  // Return the original Feign exception message if not matched
+            }
         } catch (Exception e) {
             log.error("An unexpected error occurred:{}", e.getMessage());
             return createErrorResponse(500,

auth_token_generator/src/main/java/io/entgra/auth_token_getter/util/TokenDataHolder.java

@@ -25,8 +25,8 @@ import org.springframework.stereotype.Component;
 @Component
 public class TokenDataHolder {
 
-    private String access_token;
+    private String accessToken;
     private String scope;
-    private int expires_in;
+    private int expiresIn;
-    private String token_type;
+    private String tokenType;
 }