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tracer.go
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tracer.go
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package tracer
import (
"context"
"fmt"
"os"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/trace"
)
type Driver string
const (
DriverLocal Driver = "local"
DriverOpenTelemetryProtocol Driver = "otlp"
)
func Open(driver Driver, endpoint string, insecure bool) (trace.SpanExporter, error) {
switch driver {
case DriverOpenTelemetryProtocol:
return openOpenTelemetryProtocolExporter(endpoint, insecure)
case DriverLocal:
fallthrough
default:
return openLocalExporter(endpoint, insecure)
}
}
func openOpenTelemetryProtocolExporter(endpoint string, insecure bool) (exporter trace.SpanExporter, err error) {
options := []otlptracehttp.Option{
otlptracehttp.WithEndpoint(endpoint),
}
if insecure {
options = append(options, otlptracehttp.WithInsecure())
}
return otlptrace.New(context.Background(), otlptracehttp.NewClient(options...))
}
func openLocalExporter(path string, _ bool) (exporter trace.SpanExporter, err error) {
file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, os.ModePerm)
if err != nil {
return nil, fmt.Errorf("open local exporter file: %w", err)
}
return stdouttrace.New(
stdouttrace.WithWriter(file),
stdouttrace.WithPrettyPrint(),
stdouttrace.WithoutTimestamps(),
)
}