/
trace.go
53 lines (45 loc) · 1.29 KB
/
trace.go
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package trace
import (
"context"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"github.com/dapr/kit/logger"
)
// NewStringExporter returns a new string exporter instance.
//
// It is very useful in testing scenario where we want to validate trace propagation.
func NewStringExporter(buffer *string, logger logger.Logger) *Exporter {
return &Exporter{
Buffer: buffer,
logger: logger,
}
}
// Exporter is an OpenTelemetry string exporter.
type Exporter struct {
Buffer *string
logger logger.Logger
}
// ExportSpan exports span content to the buffer.
func (se *Exporter) ExportSpans(ctx context.Context, spans []sdktrace.ReadOnlySpan) error {
*se.Buffer = spans[0].Status().Code.String()
return nil
}
// ExportSpan exports span content to the buffer.
func (se *Exporter) Shutdown(ctx context.Context) error {
return nil
}
// Register creates a new string exporter endpoint and reporter.
func (se *Exporter) Register(daprID string) {
// Register a resource
r := resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceNameKey.String(daprID),
)
tp := sdktrace.NewTracerProvider(
sdktrace.WithBatcher(se),
sdktrace.WithResource(r),
)
otel.SetTracerProvider(tp)
}