class TraceabilityHandler implements MiddlewareHandler {
    static final Logger logger = LoggerFactory.getLogger(TraceabilityHandler.class);
    private static final String TID = "tId";

    public static TraceabilityConfig config;

    private volatile HttpHandler next;

    public TraceabilityHandler() {
        config = TraceabilityConfig.load();
    }

    @Override
    public void handleRequest(final HttpServerExchange exchange) throws Exception {
        if (logger.isDebugEnabled()) logger.trace("TraceabilityHandler.handleRequest starts.");
        String tid = exchange.getRequestHeaders().getFirst(HttpStringConstants.TRACEABILITY_ID);
        if(tid != null) {
            exchange.getResponseHeaders().put(HttpStringConstants.TRACEABILITY_ID, tid);
            this.addHandlerMDCContext(exchange, TID, tid);
            MDC.put(TID, tid);
        } else {
            MDC.remove(TID);
        }
        if (logger.isDebugEnabled()) logger.trace("TraceabilityHandler.handleRequest ends.");
        Handler.next(exchange, next);
    }

    @Override
    public HttpHandler getNext() {
        return next;
    }

    @Override
    public MiddlewareHandler setNext(final HttpHandler next) {
        Handlers.handlerNotNull(next);
        this.next = next;
        return this;
    }

    @Override
    public boolean isEnabled() {
        return config.isEnabled();
    }

    @Override
    public void register() {
        ModuleRegistry.registerModule(TraceabilityConfig.CONFIG_NAME, TraceabilityHandler.class.getName(), Config.getNoneDecryptedInstance().getJsonMapConfigNoCache(TraceabilityConfig.CONFIG_NAME), null);
    }

    @Override
    public void reload() {<FILL_FUNCTION_BODY>}
}

        config.reload();
        ModuleRegistry.registerModule(TraceabilityConfig.CONFIG_NAME, TraceabilityHandler.class.getName(), Config.getNoneDecryptedInstance().getJsonMapConfigNoCache(TraceabilityConfig.CONFIG_NAME), null);
        if(logger.isInfoEnabled()) logger.info("TraceabilityHandler is reloaded.");
    
<no_super_class>