Throw OAuthException when refresh token no longer valid

src/main/java/org/genesys2/client/oauth/api/GenesysApi.java

@@ -24,6 +24,7 @@ import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 import org.genesys2.client.oauth.GenesysApiException;
 import org.scribe.builder.api.DefaultApi20;
+import org.scribe.exceptions.OAuthException;
 import org.scribe.extractors.AccessTokenExtractor;
 import org.scribe.extractors.JsonTokenExtractor;
 import org.scribe.model.OAuthConfig;
@@ -37,20 +38,20 @@ import org.scribe.utils.OAuthEncoder;
  * Genesys API v1.
  */
 public class GenesysApi extends DefaultApi20 {
-	
+
 	/** The Constant _log. */
 	private static final Logger _log = LogManager.getLogger(GenesysApi.class);
 
-	/**  OAuth2 authorization endpoint that is appended to {@link #baseUrl}. */
+	/** OAuth2 authorization endpoint that is appended to {@link #baseUrl}. */
 	public static final String AUTHORIZE_URL = "/oauth/authorize?client_id=%s&client_secret=%s&response_type=code&redirect_uri=%s";
 
-	/**  OAuth2 access token endpoint that is appended to {@link #baseUrl}. */
+	/** OAuth2 access token endpoint that is appended to {@link #baseUrl}. */
 	private static final String TOKEN_ENDPOINT = "/oauth/token";
 
 	/** The base URL of the Genesys server (e.g. https://www.genesys-pgr.org) */
 	private String baseUrl;
 
-	/**  The complete authorization url. */
+	/** The complete authorization url. */
 	private String authorizeUrl;
 
 	/** The scoped authorize url. */
@@ -162,6 +163,8 @@ public class GenesysApi extends DefaultApi20 {
 		_log.debug("Redirect: " + response.getHeader(HttpHeaders.LOCATION));
 		if (response.getCode() >= 200 && response.getCode() < 300) {
 			return getAccessTokenExtractor().extract(response.getBody());
+		} else if (response.getCode() == 400) {
+			throw new OAuthException("Refresh token no longer valid.");
 		} else {
 			throw new GenesysApiException("Server responded with unexpected HTTP response code " + response.getCode());
 		}