How to add custom collector?

[FixRM]

Hello, I'm trying to export existing monitoring statistics in Prometheus format using this library. I tried to create custom ICollector implementation and add it on startup like this: Metrics.DefaultCollectorRegistry.Add(new MyCollector());. The problem is that I got internal errors while writing to IMetricsWriter as it is not clear what methods should I call and in what order. Can you please point me to documentation or existing sample? I tried to figure that out from the Gauge sources, but It seems to be too complicated for me)

p.s. May be there is a better option?

[phnx47]

@FixRM Hi, did you look standard collectors, example GCCollectionCountCollector?

[FixRM]

Hi @phnx47! Thank you, it works! Can you please explain me the purpose of each entity in hierarchy Metric -> Sample -> Label. For instance, it is not clear what is string value parameter of WriteLabel.

[phnx47]

@FixRM WriteLabel - label name and label value. Maybe this https://prometheus.io/docs/concepts/data_model/#notation can help?