go/opentelemetry-go
go/opentelemetry-go
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This commit is contained in:
jmacd 2020-06-10 00:05:17 -07:00
parent 6f0c6b4683
commit bb2eb8ee26
1 changed files with 19 additions and 3 deletions
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22
sdk/export/metric/aggregation/aggregation.go
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@ -25,9 +25,12 @@ import (
// Aggregation.
type (
// Aggregation is one of the interfaces below.
// Aggregation is an interface returned by the Aggregator
// containing an interval of metric data.
Aggregation interface {
// Kind returns the kind of aggregation used.
// Kind returns a short identifying string to identify
// the Aggregator that was used to produce the
// Aggregation (e.g., "sum").
Kind() Kind
}
@ -105,6 +108,19 @@ type (
)
type (
// Kind is a short name for the Aggregator that produces an
// Aggregation, used for descriptive purpose only. Kind is a
// string to allow user-defined Aggregators.
//
// When deciding how to handle an Aggregation, Exporters are
// encouraged to decide based on conversion to the above
// interfaces based on strength, not on Kind value, when
// deciding how to expose metric data. This enables
// user-supplied Aggregators to replace builtin Aggregators.
//
// For example, test for a Distribution before testing for a
// MinMaxSumCount, test for a Histogram before testing for a
// Sum, and so on.
Kind string
)
@ -130,7 +146,7 @@ var (
ErrNoData = fmt.Errorf("no data collected by this aggregator")
)
// String returns a string representation of the aggregation kind.
// String returns the string value of Kind.
func (k Kind) String() string {
return string(k)
}