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traces.go
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traces.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package routingprocessor // import "github.com/open-telemetry/opentelemetry-collector-contrib/processor/routingprocessor"
import (
"context"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/exporter"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/ptrace"
"go.opentelemetry.io/collector/processor"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.uber.org/multierr"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/ottl"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/ottl/contexts/ottlspan"
"github.com/open-telemetry/opentelemetry-collector-contrib/processor/routingprocessor/internal/common"
"github.com/open-telemetry/opentelemetry-collector-contrib/processor/routingprocessor/internal/metadata"
)
var _ processor.Traces = (*tracesProcessor)(nil)
type tracesProcessor struct {
logger *zap.Logger
config *Config
extractor extractor
router router[exporter.Traces, ottlspan.TransformContext]
nonRoutedSpansCounter metric.Int64Counter
}
func newTracesProcessor(settings component.TelemetrySettings, config component.Config) (*tracesProcessor, error) {
cfg := rewriteRoutingEntriesToOTTL(config.(*Config))
spanParser, err := ottlspan.NewParser(common.Functions[ottlspan.TransformContext](), settings)
if err != nil {
return nil, err
}
meter := settings.MeterProvider.Meter(scopeName + nameSep + "traces")
nonRoutedSpansCounter, err := meter.Int64Counter(
metadata.Type.String()+metricSep+processorKey+metricSep+nonRoutedSpansKey,
metric.WithDescription("Number of spans that were not routed to some or all exporters."),
)
if err != nil {
return nil, err
}
return &tracesProcessor{
logger: settings.Logger,
config: cfg,
router: newRouter[exporter.Traces, ottlspan.TransformContext](
cfg.Table,
cfg.DefaultExporters,
settings,
spanParser,
),
extractor: newExtractor(cfg.FromAttribute, settings.Logger),
nonRoutedSpansCounter: nonRoutedSpansCounter,
}, nil
}
func (p *tracesProcessor) Start(_ context.Context, host component.Host) error {
err := p.router.registerExporters(host.GetExporters()[component.DataTypeTraces]) //nolint:staticcheck
if err != nil {
return err
}
return nil
}
func (p *tracesProcessor) ConsumeTraces(ctx context.Context, t ptrace.Traces) error {
// TODO: determine the proper action when errors happen
if p.config.FromAttribute == "" {
err := p.route(ctx, t)
if err != nil {
return err
}
return nil
}
err := p.routeForContext(ctx, t)
if err != nil {
return err
}
return nil
}
type spanGroup struct {
exporters []exporter.Traces
traces ptrace.Traces
}
func (p *tracesProcessor) route(ctx context.Context, t ptrace.Traces) error {
// groups is used to group ptrace.ResourceSpans that are routed to
// the same set of exporters. This way we're not ending up with all the
// logs split up which would cause higher CPU usage.
groups := map[string]spanGroup{}
var errs error
for i := 0; i < t.ResourceSpans().Len(); i++ {
rspans := t.ResourceSpans().At(i)
stx := ottlspan.NewTransformContext(
ptrace.NewSpan(),
pcommon.NewInstrumentationScope(),
rspans.Resource(),
)
matchCount := len(p.router.routes)
for key, route := range p.router.routes {
_, isMatch, err := route.statement.Execute(ctx, stx)
if err != nil {
if p.config.ErrorMode == ottl.PropagateError {
return err
}
p.group("", groups, p.router.defaultExporters, rspans)
p.recordNonRoutedResourceSpans(ctx, key, rspans)
continue
}
if !isMatch {
matchCount--
continue
}
p.group(key, groups, route.exporters, rspans)
}
if matchCount == 0 {
// no route conditions are matched, add resource spans to default exporters group
p.group("", groups, p.router.defaultExporters, rspans)
p.recordNonRoutedResourceSpans(ctx, "", rspans)
}
}
for _, g := range groups {
for _, e := range g.exporters {
errs = multierr.Append(errs, e.ConsumeTraces(ctx, g.traces))
}
}
return errs
}
func (p *tracesProcessor) group(key string, groups map[string]spanGroup, exporters []exporter.Traces, spans ptrace.ResourceSpans) {
group, ok := groups[key]
if !ok {
group.traces = ptrace.NewTraces()
group.exporters = exporters
}
spans.CopyTo(group.traces.ResourceSpans().AppendEmpty())
groups[key] = group
}
func (p *tracesProcessor) recordNonRoutedResourceSpans(ctx context.Context, routingKey string, rspans ptrace.ResourceSpans) {
spanCount := 0
ilss := rspans.ScopeSpans()
for j := 0; j < ilss.Len(); j++ {
spanCount += ilss.At(j).Spans().Len()
}
p.nonRoutedSpansCounter.Add(
ctx,
int64(spanCount),
metric.WithAttributes(
attribute.String("routing_key", routingKey),
),
)
}
func (p *tracesProcessor) routeForContext(ctx context.Context, t ptrace.Traces) error {
value := p.extractor.extractFromContext(ctx)
exporters := p.router.getExporters(value)
if value == "" { // "" is a key for default exporters
p.nonRoutedSpansCounter.Add(
ctx,
int64(t.SpanCount()),
metric.WithAttributes(
attribute.String("routing_key", p.extractor.fromAttr),
),
)
}
var errs error
for _, e := range exporters {
errs = multierr.Append(errs, e.ConsumeTraces(ctx, t))
}
return errs
}
func (p *tracesProcessor) Capabilities() consumer.Capabilities {
return consumer.Capabilities{MutatesData: false}
}
func (p *tracesProcessor) Shutdown(context.Context) error {
return nil
}