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6f04903876
* draft using stop aggregating on prometheus client (counters) * remove prometheus client aggregations Measures are being exported as summaries since histograms doesn't exist on OpenTelemetry yet. Better error handling must be done. * make pre commit * add simple error callback * remove options from collector * refactor exporter to smaller methods * wording * change to snapshot * lock collection and checkpointset read * remove histogram options and unexported fields from the Exporter * documenting why prometheus uses a stateful batcher * add todo for histograms * change summaries objects to summary quantiles * remove histogram buckets from tests * wording * rename 'lockedCheckpoint' to 'syncCheckpointSet' * default summary quantiles should be defaulted to no buckets. * add quantiles options * refactor test.CheckpointSet and add docs * flip aggregators merge Co-authored-by: Joshua MacDonald <jmacd@users.noreply.github.com>
90 lines
2.7 KiB
Go
90 lines
2.7 KiB
Go
package test
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import (
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"context"
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"go.opentelemetry.io/otel/api/core"
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export "go.opentelemetry.io/otel/sdk/export/metric"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/array"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/counter"
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"go.opentelemetry.io/otel/sdk/metric/aggregator/gauge"
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)
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type CheckpointSet struct {
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encoder export.LabelEncoder
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records map[string]export.Record
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updates []export.Record
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}
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// NewCheckpointSet returns a test CheckpointSet that new records could be added.
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// Records are grouped by their LabelSet.
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func NewCheckpointSet(encoder export.LabelEncoder) *CheckpointSet {
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return &CheckpointSet{
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encoder: encoder,
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records: make(map[string]export.Record),
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}
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}
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func (p *CheckpointSet) Reset() {
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p.records = make(map[string]export.Record)
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p.updates = nil
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}
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// Add a new descriptor to a Checkpoint.
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//
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// If there is an existing record with the same descriptor and LabelSet
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// the stored aggregator will be returned and should be merged.
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func (p *CheckpointSet) Add(desc *export.Descriptor, newAgg export.Aggregator, labels ...core.KeyValue) (agg export.Aggregator, added bool) {
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encoded := p.encoder.Encode(labels)
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elabels := export.NewLabels(labels, encoded, p.encoder)
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key := desc.Name() + "_" + elabels.Encoded()
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if record, ok := p.records[key]; ok {
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return record.Aggregator(), false
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}
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rec := export.NewRecord(desc, elabels, newAgg)
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p.updates = append(p.updates, rec)
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p.records[key] = rec
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return newAgg, true
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}
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func createNumber(desc *export.Descriptor, v float64) core.Number {
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if desc.NumberKind() == core.Float64NumberKind {
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return core.NewFloat64Number(v)
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}
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return core.NewInt64Number(int64(v))
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}
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func (p *CheckpointSet) AddGauge(desc *export.Descriptor, v float64, labels ...core.KeyValue) {
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p.updateAggregator(desc, gauge.New(), v, labels...)
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}
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func (p *CheckpointSet) AddCounter(desc *export.Descriptor, v float64, labels ...core.KeyValue) {
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p.updateAggregator(desc, counter.New(), v, labels...)
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}
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func (p *CheckpointSet) AddMeasure(desc *export.Descriptor, v float64, labels ...core.KeyValue) {
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p.updateAggregator(desc, array.New(), v, labels...)
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}
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func (p *CheckpointSet) updateAggregator(desc *export.Descriptor, newAgg export.Aggregator, v float64, labels ...core.KeyValue) {
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ctx := context.Background()
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// Updates and checkpoint the new aggregator
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_ = newAgg.Update(ctx, createNumber(desc, v), desc)
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newAgg.Checkpoint(ctx, desc)
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// Try to add this aggregator to the CheckpointSet
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agg, added := p.Add(desc, newAgg, labels...)
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if !added {
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// An aggregator already exist for this descriptor and label set, we should merge them.
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_ = agg.Merge(newAgg, desc)
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}
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}
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func (p *CheckpointSet) ForEach(f func(export.Record)) {
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for _, r := range p.updates {
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f(r)
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}
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}
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