this.condition = lock.newCondition();
        this.timeoutMs = timeoutMs;
        this.counter = counter;
        this.last = first;
    }

    public <T extends TrackingHttpHandler> T addHandler(HandlerFactory<T> factory) {
        lock.lock();
        try {
            T handler = factory.create(last);
            handlers.add(handler);
            last = handler.getWaitPrecondition();
            return handler;