### Helpers
- Cross-cutting utilities in `helper.*`
- Stateless, injected via DI
- Access via `ComponentUtil.getFooHelper()`

## Development Notes

- **Code Style**: Enforced by `mvn formatter:format`
- **License Headers**: Required (Apache 2.0) - use `mvn license:format`
- **Logging**: Log4j2 - `src/main/resources/log4j2.xml`
- **i18n**: All user-facing strings in `fess_label_*.properties`

    }

    /**
     * Delays before processing a URL, ensuring that requests to the same host are not made too frequently.
     * This method extracts the host from the URL and enforces a delay based on the configured
     * delayMillisBeforeProcessing parameter.
     *
     * @throws InterruptedRuntimeException if the thread is interrupted during the delay

        int len;
        try {
            while ((len = reader.read(buf, size, bufferSize - size)) != -1) {
                size += len;
                if (size == bufferSize) {
                    // Enforce MAX_BUF_SIZE to prevent unbounded memory growth
                    final int newBufferSize = bufferSize + initialCapacity;
                    if (newBufferSize > MAX_BUF_SIZE) {

				"application/vnd.seemail",
				"application/vnd.sema",
				"application/vnd.semd",
				"application/vnd.semf",
				"application/vnd.shana.informed.formdata",
				"application/vnd.shana.informed.formtemplate",
				"application/vnd.shana.informed.interchange",
				"application/vnd.shana.informed.package",
				"application/vnd.simtech-mindmapper",
				"application/vnd.smaf",
				"application/vnd.smart.teacher",

        return resultBuf.toString();

    }

    /**
     * Gets the count of currently running crawler jobs.
     * This method queries the scheduled jobs to count active crawler processes.
     * Used to enforce maximum concurrent crawler limits.
     *
     * @return the number of currently running crawler jobs
     */
    protected int getRunningJobCount() {
        final AtomicInteger counter = new AtomicInteger(0);

    }

    /**
     * Retrieves a list of documents that match the specified query.
     * This method handles large result sets by using scroll search when necessary
     * and enforces maximum document size limits.
     *
     * @param searchEngineClient the search engine client to use for retrieval
     * @param queryBuilder the query to match documents