*/
    public static final String ROLE = "admin-backup";

    private static final Logger logger = LogManager.getLogger(AdminBackupAction.class);

    /**
     * The ndjson extension.
     */
    public static final String NDJSON_EXTENTION = ".ndjson";

    private static final DateTimeFormatter ISO_8601_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS");

    @Resource

 - [Simple](https://github.com/codelibs/fess-theme-simple)
 - [Classic](https://github.com/codelibs/fess-theme-classic)

## Ingest

 - [Logger](https://github.com/codelibs/fess-ingest-logger)
 - [NDJSON](https://github.com/codelibs/fess-ingest-ndjson)

## Script

 - [Groovy](https://github.com/codelibs/fess-script-groovy)
 - [OGNL](https://github.com/codelibs/fess-script-ognl)

## Development Information

### Get Source Code

index.backup.targets=fess_basic_config.bulk,fess_config.bulk,fess_user.bulk,system.properties,fess.json,doc.json
# Target log files for index backup.
index.backup.log.targets=click_log.ndjson,favorite_log.ndjson,search_log.ndjson,user_info.ndjson
# Timeout for loading index backup logs.
index.backup.log.load.timeout=60000

# logging

# Application packages for logging.

        final JsonRequestParams params = new JsonRequestParams(request, fessConfig);
        try {
            response.setContentType("application/x-ndjson; charset=UTF-8");
            final long count = searchHelper.scrollSearch(params, doc -> {
                buf.setLength(0);
                buf.append('{');
                boolean first2 = true;

    String INDEX_BACKUP_TARGETS = "index.backup.targets";

    /** The key of the configuration. e.g. click_log.ndjson,favorite_log.ndjson,search_log.ndjson,user_info.ndjson */
    String INDEX_BACKUP_LOG_TARGETS = "index.backup.log.targets";

    /** The key of the configuration. e.g. 60000 */