logger.debug("Fess JSON import started: fileName={}", fileName);
        }

        try (final InputStream in = new FileInputStream(tempFile); final OutputStream out = Files.newOutputStream(getFessJsonPath())) {
            CopyUtil.copy(in, out);

            if (logger.isInfoEnabled()) {
                logger.info("Fess JSON import completed successfully: fileName={}", fileName);
            }

            return;
        }

        Path handleFile = stateDirectory.resolve(info.getCreateGuid().toString() + ".handle");
        try (ObjectOutputStream oos = new ObjectOutputStream(Files.newOutputStream(handleFile, StandardOpenOption.CREATE,
                StandardOpenOption.WRITE, StandardOpenOption.TRUNCATE_EXISTING))) {
            oos.writeObject(info);
            log.debug("Persisted handle: {}", info.getPath());

            final Path tempFile = ComponentUtil.getSystemHelper().createTempFile("fess-badword-", ".csv").toPath();
            try {
                try (Writer writer = new BufferedWriter(new OutputStreamWriter(Files.newOutputStream(tempFile), getCsvEncoding()))) {
                    badWordService.exportCsv(writer);
                } catch (final Exception e) {
                    logger.warn("Failed to process a request.", e);

            final Path tempFile = ComponentUtil.getSystemHelper().createTempFile("fess-elevate-", ".csv").toPath();
            try {
                try (Writer writer = new BufferedWriter(new OutputStreamWriter(Files.newOutputStream(tempFile), getCsvEncoding()))) {
                    elevateWordService.exportCsv(writer);
                } catch (final Exception e) {
                    logger.warn("Failed to process a request.", e);

            final Path tempFile = ComponentUtil.getSystemHelper().createTempFile("fess-badword-", ".csv").toPath();
            try {
                try (Writer writer = new BufferedWriter(new OutputStreamWriter(Files.newOutputStream(tempFile), getCsvEncoding()))) {
                    badWordService.exportCsv(writer);
                } catch (final Exception e) {
                    logger.warn("Failed to process a request.", e);

            final Path tempFile = ComponentUtil.getSystemHelper().createTempFile("fess-elevate-", ".csv").toPath();
            try {
                try (Writer writer = new BufferedWriter(new OutputStreamWriter(Files.newOutputStream(tempFile), getCsvEncoding()))) {
                    elevateWordService.exportCsv(writer);
                } catch (final Exception e) {
                    logger.warn("Failed to process a request.", e);

    private void persistHandle(HandleInfo info) {
        Path handleFile = stateDirectory.resolve(info.createGuid.toString() + ".handle");
        try (ObjectOutputStream oos = new ObjectOutputStream(
                Files.newOutputStream(handleFile))) {
            oos.writeObject(info);
        } catch (IOException e) {
            log.error("Failed to persist handle: " + info.path, e);
        }
    }