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Prometheus protocol support #54
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Metrics will get to the monitor component using the Promethesus protocol.
This has been extracted so that it can be used outside of the filter package.
These are going to be need from multiple places within influx-spout.
There's some newer assertion helpers which are quite useful (particularly ElementsMatch).
This data structure holds a collection of metrics, allowing for updates which override earlier versions of a metric.
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This pull request implements lightweight functionality for parsing, collecting and emitting Prometheus protocol metric lines. This is implemented inside influx-spout instead of using the official packages because the official APIs and data structures don't fit our monitor use case well and they pull in a significant amount of unnecessary code.
This functionality will be used in the upcoming
monitorcomponent (see #29) to receive and collect operational metrics from the various influx-spout components and make them available to Prometheus.Noteworthy:
filter.fastParseInthas been moved toconvert.ToIntas it was useful for the prometheus protocol codeElementsMatchin particular)