String bucketName = System.getenv('G_GCS_BUCKET')
        def transport = new NetHttpTransport()
        def jsonFactory = new GsonFactory()
        Storage.Builder builder = new Storage.Builder(transport, jsonFactory, null)
        GoogleCredential googleCredential = GoogleCredential.getApplicationDefault(transport, jsonFactory)
        builder.setHttpRequestInitializer(new HttpRequestInitializer() {
            @Override

    def httpResponse = new MockLowLevelHttpResponse()
    def transport = new MockHttpTransport.Builder()
        .setLowLevelHttpResponse(httpResponse)
        .build()
    def jsonFactory = new GsonFactory()
    def credential = Mock(Credential)
    def credentialSupplier = new Supplier<Credential>() {
        @Override
        Credential get() {
            return credential
        }
    }

        HttpTransport transport = GoogleNetHttpTransport.newTrustedTransport();
        JsonFactory jsonFactory = new GsonFactory();
        Storage.Builder builder = new Storage.Builder(transport, jsonFactory, null);
        if (gcsConnectionProperties.requiresAuthentication()) {
            Supplier<Credential> credentialSupplier = getCredentialSupplier(transport, jsonFactory);

    protected static final String OIC_STATE = "OIC_STATE";

    protected final HttpTransport httpTransport = new NetHttpTransport();

    protected final JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();

    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }