B 3\x@s.dZddlmZedddddgZdd Zd S) z Prometheus metrics exported by Jupyter Notebook Server Read https://prometheus.io/docs/practices/naming/ for naming conventions for metrics & labels. ) HistogramZhttp_request_duration_secondsz)duration in seconds for all HTTP requestsmethodhandler status_codecCs:tj|jjd|jjt|j| d |j dS)a Tornado log handler for recording RED metrics. We record the following metrics: Rate - the number of requests, per second, your services are serving. Errors - the number of failed requests per second. Duration - The amount of time each request takes expressed as a time interval. We use a fully qualified name of the handler as a label, rather than every url path to reduce cardinality. This function should be either the value of or called from a function that is the 'log_function' tornado setting. This makes it get called at the end of every request, allowing us to record the metrics we need. z{}.{})rrrN) HTTP_REQUEST_DURATION_SECONDSlabelsZrequestrformat __class__ __module__type__name__Z get_statusZobserveZ request_time)rr /lib/python3.7/site-packages/notebook/metrics.pyprometheus_log_methods  rN)__doc__Zprometheus_clientrrrr r r rs