public static final String FILE_CLEANING_TRACKER_ATTRIBUTE = JakartaFileCleaner.class.getName() + ".FileCleaningTracker";

    /**
     * Gets the instance of {@link FileCleaningTracker}, which is associated with the given {@link ServletContext}.
     *
     * @param servletContext The servlet context to query
     * @return The contexts tracker
     */
    public static FileCleaningTracker getFileCleaningTracker(final ServletContext servletContext) {
        return (FileCleaningTracker) servletContext.getAttribute(FILE_CLEANING_TRACKER_ATTRIBUTE);
    }

    /**
     * Sets the instance of {@link FileCleaningTracker}, which is associated with the given {@link ServletContext}.
     *
     * @param servletContext The servlet context to modify
     * @param tracker        The tracker to set
     */
    public static void setFileCleaningTracker(final ServletContext servletContext, final FileCleaningTracker tracker) {
        servletContext.setAttribute(FILE_CLEANING_TRACKER_ATTRIBUTE, tracker);
    }

    /**
     * Called when the web application is being destroyed. Calls {@link FileCleaningTracker#exitWhenFinished()}.
     *
     * @param sce The servlet context, used for calling {@link #getFileCleaningTracker(ServletContext)}.
     */
    @Override
    public void contextDestroyed(final ServletContextEvent sce) {
        getFileCleaningTracker(sce.getServletContext()).exitWhenFinished();
    }

    /**
     * Called when the web application is initialized. Does nothing.
     *
     * @param sce The servlet context, used for calling {@link #setFileCleaningTracker(ServletContext, FileCleaningTracker)}.
     */
    @Override
    public void contextInitialized(final ServletContextEvent sce) {
        setFileCleaningTracker(sce.getServletContext(), new FileCleaningTracker());
    }
}