jaegertracing / jaeger-lib / 149

100%

push

travis-ci

Support Prometheus metrics directly (#29)

Prometheus requires pre-declaring all metrics and their labels, and for a given metric name only one set of labels is allowed, otherwise panic occurs.

The approach here is to cache metric vectors registered with Prometheus using metric's name and a sorted list of labels as the cache key. This allows creating Jaeger metrics objects multiple times even with the same name and a set of tags.

151 of 151 new or added lines in 2 files covered. (100.0%)

719 of 719 relevant lines covered (100.0%)

76.74 hits per line