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helper.go
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helper.go
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheusremotewrite
const (
nameStr = "__name__"
sumStr = "_sum"
countStr = "_count"
bucketStr = "_bucket"
leStr = "le"
quantileStr = "quantile"
pInfStr = "+Inf"
// maxExemplarRunes is the maximum number of UTF-8 exemplar characters
// according to the prometheus specification
// https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#exemplars
maxExemplarRunes = 128
// Trace and Span id keys are defined as part of the spec:
// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification%2Fmetrics%2Fdatamodel.md#exemplars-2
traceIDKey = "trace_id"
spanIDKey = "span_id"
infoType = "info"
targetMetricName = "target_info"
)
type bucketBoundsData struct {
sig string
bound float64
}
// byBucketBoundsData enables the usage of sort.Sort() with a slice of bucket bounds
type byBucketBoundsData []bucketBoundsData
func (m byBucketBoundsData) Len() int { return len(m) }
func (m byBucketBoundsData) Less(i, j int) bool { return m[i].bound < m[j].bound }
func (m byBucketBoundsData) Swap(i, j int) { m[i], m[j] = m[j], m[i] }