Fess is based on [OpenSearch](https://github.com/opensearch-project/OpenSearch), but knowledge/experience about OpenSearch is _not_ required. Fess provides an easy to use Administration GUI to configure the system via your browser.

    }

    /**
     * Extracts and normalizes language preferences from request parameters or browser locale.
     *
     * This method prioritizes explicit language parameters over browser locale settings
     * and handles special cases like "all languages" selection.
     *
     * @param request The HTTP servlet request

import jakarta.annotation.PreDestroy;

/**
 * Helper class for system-level operations and utilities.
 * This class provides methods for managing system properties, handling JSP files,
 * normalizing configurations, and other system-related tasks.
 */
public class SystemHelper {

    /**
     * Constructs a new system helper.
     */
    public SystemHelper() {
        // do nothing
    }