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logger.go
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logger.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package log // import "go.opentelemetry.io/otel/sdk/log"
import (
"context"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/log"
"go.opentelemetry.io/otel/log/embedded"
"go.opentelemetry.io/otel/sdk/instrumentation"
"go.opentelemetry.io/otel/trace"
)
var now = time.Now
// Compile-time check logger implements log.Logger.
var _ log.Logger = (*logger)(nil)
type logger struct {
embedded.Logger
provider *LoggerProvider
instrumentationScope instrumentation.Scope
}
func newLogger(p *LoggerProvider, scope instrumentation.Scope) *logger {
return &logger{
provider: p,
instrumentationScope: scope,
}
}
func (l *logger) Emit(ctx context.Context, r log.Record) {
newRecord := l.newRecord(ctx, r)
for _, p := range l.provider.processors {
if err := p.OnEmit(ctx, newRecord); err != nil {
otel.Handle(err)
}
}
}
func (l *logger) Enabled(ctx context.Context, r log.Record) bool {
newRecord := l.newRecord(ctx, r)
for _, p := range l.provider.processors {
if enabled := p.Enabled(ctx, newRecord); enabled {
return true
}
}
return false
}
func (l *logger) newRecord(ctx context.Context, r log.Record) Record {
sc := trace.SpanContextFromContext(ctx)
newRecord := Record{
timestamp: r.Timestamp(),
observedTimestamp: r.ObservedTimestamp(),
severity: r.Severity(),
severityText: r.SeverityText(),
body: r.Body(),
traceID: sc.TraceID(),
spanID: sc.SpanID(),
traceFlags: sc.TraceFlags(),
resource: l.provider.resource,
scope: &l.instrumentationScope,
attributeValueLengthLimit: l.provider.attributeValueLengthLimit,
attributeCountLimit: l.provider.attributeCountLimit,
}
// This field SHOULD be set once the event is observed by OpenTelemetry.
if newRecord.observedTimestamp.IsZero() {
newRecord.observedTimestamp = now()
}
r.WalkAttributes(func(kv log.KeyValue) bool {
newRecord.AddAttributes(kv)
return true
})
return newRecord
}