diff options
Diffstat (limited to 'vendor/github.com/prometheus/client_golang/prometheus/metric.go')
-rw-r--r-- | vendor/github.com/prometheus/client_golang/prometheus/metric.go | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/metric.go index 76035bc..06897f2 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/metric.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/metric.go @@ -15,6 +15,9 @@ package prometheus import ( "strings" + "time" + + "github.com/gogo/protobuf/proto" dto "github.com/prometheus/client_model/go" ) @@ -142,3 +145,31 @@ func NewInvalidMetric(desc *Desc, err error) Metric { func (m *invalidMetric) Desc() *Desc { return m.desc } func (m *invalidMetric) Write(*dto.Metric) error { return m.err } + +type timestampedMetric struct { + Metric + t time.Time +} + +func (m timestampedMetric) Write(pb *dto.Metric) error { + e := m.Metric.Write(pb) + pb.TimestampMs = proto.Int64(m.t.Unix()*1000 + int64(m.t.Nanosecond()/1000000)) + return e +} + +// NewMetricWithTimestamp returns a new Metric wrapping the provided Metric in a +// way that it has an explicit timestamp set to the provided Time. This is only +// useful in rare cases as the timestamp of a Prometheus metric should usually +// be set by the Prometheus server during scraping. Exceptions include mirroring +// metrics with given timestamps from other metric +// sources. +// +// NewMetricWithTimestamp works best with MustNewConstMetric, +// MustNewConstHistogram, and MustNewConstSummary, see example. +// +// Currently, the exposition formats used by Prometheus are limited to +// millisecond resolution. Thus, the provided time will be rounded down to the +// next full millisecond value. +func NewMetricWithTimestamp(t time.Time, m Metric) Metric { + return timestampedMetric{Metric: m, t: t} +} |