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otlp_transaction.go
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/
otlp_transaction.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 internal // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/prometheusreceiver/internal"
import (
"context"
"sync/atomic"
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/model/exemplar"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/storage"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/config"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/model/pdata"
"go.opentelemetry.io/collector/obsreport"
"go.uber.org/zap"
)
type transactionPdata struct {
id int64
isNew bool
ctx context.Context
useStartTimeMetric bool
startTimeMetricRegex string
sink consumer.Metrics
metadataService *metadataService
externalLabels labels.Labels
nodeResource *pdata.Resource
logger *zap.Logger
receiverID config.ComponentID
metricBuilder *metricBuilderPdata
job, instance string
jobsMap *JobsMapPdata
obsrecv *obsreport.Receiver
startTimeMs int64
}
type txConfig struct {
jobsMap *JobsMapPdata
useStartTimeMetric bool
startTimeMetricRegex string
receiverID config.ComponentID
ms *metadataService
sink consumer.Metrics
externalLabels labels.Labels
settings component.ReceiverCreateSettings
}
func newTransactionPdata(ctx context.Context, txc *txConfig) *transactionPdata {
return &transactionPdata{
id: atomic.AddInt64(&idSeq, 1),
ctx: ctx,
isNew: true,
sink: txc.sink,
jobsMap: txc.jobsMap,
useStartTimeMetric: txc.useStartTimeMetric,
startTimeMetricRegex: txc.startTimeMetricRegex,
receiverID: txc.receiverID,
metadataService: txc.ms,
externalLabels: txc.externalLabels,
logger: txc.settings.Logger,
obsrecv: obsreport.NewReceiver(obsreport.ReceiverSettings{ReceiverID: txc.receiverID, Transport: transport, ReceiverCreateSettings: txc.settings}),
}
}
// Append always returns 0 to disable label caching.
func (t *transactionPdata) Append(ref storage.SeriesRef, labels labels.Labels, atMs int64, value float64) (pointCount storage.SeriesRef, err error) {
select {
case <-t.ctx.Done():
return 0, errTransactionAborted
default:
}
if len(t.externalLabels) != 0 {
labels = append(labels, t.externalLabels...)
}
if t.isNew {
t.startTimeMs = atMs
if err := t.initTransaction(labels); err != nil {
return 0, err
}
}
return 0, t.metricBuilder.AddDataPoint(labels, atMs, value)
}
func (t *transactionPdata) AppendExemplar(ref storage.SeriesRef, l labels.Labels, e exemplar.Exemplar) (storage.SeriesRef, error) {
return 0, nil
}
func (t *transactionPdata) initTransaction(labels labels.Labels) error {
job, instance := labels.Get(model.JobLabel), labels.Get(model.InstanceLabel)
if job == "" || instance == "" {
return errNoJobInstance
}
metadataCache, err := t.metadataService.Get(job, instance)
if err != nil {
return err
}
if t.jobsMap != nil {
t.job = job
t.instance = instance
}
t.nodeResource = CreateNodeAndResourcePdata(job, instance, metadataCache.SharedLabels().Get(model.SchemeLabel))
t.metricBuilder = newMetricBuilderPdata(metadataCache, t.useStartTimeMetric, t.startTimeMetricRegex, t.logger, t.startTimeMs)
t.isNew = false
return nil
}
func (t *transactionPdata) Commit() error {
if t.isNew {
return nil
}
t.startTimeMs = -1
ctx := t.obsrecv.StartMetricsOp(t.ctx)
metricsL, numPoints, _, err := t.metricBuilder.Build()
if err != nil {
t.obsrecv.EndMetricsOp(ctx, dataformat, 0, err)
return err
}
if t.useStartTimeMetric {
if t.metricBuilder.startTime == 0.0 {
err = errNoStartTimeMetrics
t.obsrecv.EndMetricsOp(ctx, dataformat, 0, err)
return err
}
// Otherwise adjust the startTimestamp for all the metrics.
t.adjustStartTimestampPdata(metricsL)
} else {
// TODO: Derive numPoints in this case.
_ = NewMetricsAdjusterPdata(t.jobsMap.get(t.job, t.instance), t.logger).AdjustMetricSlice(metricsL)
}
if metricsL.Len() > 0 {
metrics := t.metricSliceToMetrics(metricsL)
t.sink.ConsumeMetrics(ctx, *metrics)
}
t.obsrecv.EndMetricsOp(ctx, dataformat, numPoints, nil)
return nil
}
func (t *transactionPdata) Rollback() error {
t.startTimeMs = -1
return nil
}
func pdataTimestampFromFloat64(ts float64) pdata.Timestamp {
secs := int64(ts)
nanos := int64((ts - float64(secs)) * 1e9)
return pdata.NewTimestampFromTime(time.Unix(secs, nanos))
}
func (t transactionPdata) adjustStartTimestampPdata(metricsL *pdata.MetricSlice) {
startTimeTs := pdataTimestampFromFloat64(t.metricBuilder.startTime)
for i := 0; i < metricsL.Len(); i++ {
metric := metricsL.At(i)
switch metric.DataType() {
case pdata.MetricDataTypeGauge:
continue
case pdata.MetricDataTypeSum:
dataPoints := metric.Sum().DataPoints()
for j := 0; j < dataPoints.Len(); j++ {
dp := dataPoints.At(j)
dp.SetStartTimestamp(startTimeTs)
}
case pdata.MetricDataTypeSummary:
dataPoints := metric.Summary().DataPoints()
for j := 0; j < dataPoints.Len(); j++ {
dp := dataPoints.At(j)
dp.SetStartTimestamp(startTimeTs)
}
case pdata.MetricDataTypeHistogram:
dataPoints := metric.Histogram().DataPoints()
for j := 0; j < dataPoints.Len(); j++ {
dp := dataPoints.At(j)
dp.SetStartTimestamp(startTimeTs)
}
default:
t.logger.Warn("Unknown metric type", zap.String("type", metric.DataType().String()))
}
}
}
func (t *transactionPdata) metricSliceToMetrics(metricsL *pdata.MetricSlice) *pdata.Metrics {
metrics := pdata.NewMetrics()
rms := metrics.ResourceMetrics().AppendEmpty()
ilm := rms.InstrumentationLibraryMetrics().AppendEmpty()
metricsL.CopyTo(ilm.Metrics())
t.nodeResource.CopyTo(rms.Resource())
return &metrics
}