rename

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/JwtClientAssertionDecoderFactory.java

@@ -88,12 +88,12 @@ public final class JwtClientAssertionDecoderFactory implements JwtDecoderFactory
 		mappings.put(MacAlgorithm.HS512, "HmacSHA512");
 		JCA_ALGORITHM_MAPPINGS = Collections.unmodifiableMap(mappings);
 	}
-	private static final RestTemplate DEFAULT_REST_TEMPLATE = new RestTemplate();
+	private static final RestTemplate rest = new RestTemplate();
 	static {
 		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
 		requestFactory.setConnectTimeout(15_000);
 		requestFactory.setReadTimeout(15_000);
-		DEFAULT_REST_TEMPLATE.setRequestFactory(requestFactory);
+		rest.setRequestFactory(requestFactory);
 	}
 	private final Map<String, JwtDecoder> jwtDecoders = new ConcurrentHashMap<>();
 	private Function<RegisteredClient, OAuth2TokenValidator<Jwt>> jwtValidatorFactory = DEFAULT_JWT_VALIDATOR_FACTORY;
@@ -132,7 +132,7 @@ private static NimbusJwtDecoder buildDecoder(RegisteredClient registeredClient)
 						JWT_CLIENT_AUTHENTICATION_ERROR_URI);
 				throw new OAuth2AuthenticationException(oauth2Error);
 			}
-			return NimbusJwtDecoder.withJwkSetUri(jwkSetUrl).jwsAlgorithm((SignatureAlgorithm) jwsAlgorithm).restOperations(DEFAULT_REST_TEMPLATE).build();
+			return NimbusJwtDecoder.withJwkSetUri(jwkSetUrl).jwsAlgorithm((SignatureAlgorithm) jwsAlgorithm).restOperations(rest).build();
 		}
 		if (jwsAlgorithm instanceof MacAlgorithm) {
 			String clientSecret = registeredClient.getClientSecret();