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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Basic runtime library
package rtlib // import "go.opentelemetry.io/contrib/instrgen/rtlib"
import (
"context"
"io"
"log"
"os"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/resource"
trace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
)
// TracingState type.
type TracingState struct {
Logger *log.Logger
File *os.File
Tp *trace.TracerProvider
}
// NewTracingState.
func NewTracingState() TracingState {
var tracingState TracingState
tracingState.Logger = log.New(os.Stdout, "", 0)
// Write telemetry data to a file.
var err error
tracingState.File, err = os.Create("traces.txt")
if err != nil {
tracingState.Logger.Fatal(err)
}
var exp trace.SpanExporter
exp, err = NewExporter(tracingState.File)
if err != nil {
tracingState.Logger.Fatal(err)
}
tracingState.Tp = trace.NewTracerProvider(
trace.WithBatcher(exp),
trace.WithResource(NewResource()),
)
return tracingState
}
// NewExporter returns a console exporter.
func NewExporter(w io.Writer) (trace.SpanExporter, error) {
return stdouttrace.New(
stdouttrace.WithWriter(w),
// Use human readable output.
stdouttrace.WithPrettyPrint(),
// Do not print timestamps for the demo.
stdouttrace.WithoutTimestamps(),
)
}
// NewResource returns a resource describing this application.
func NewResource() *resource.Resource {
r, _ := resource.Merge(
resource.Default(),
resource.NewWithAttributes(
semconv.SchemaURL,
),
)
return r
}
// Shutdown.
func Shutdown(ts TracingState) {
if err := ts.Tp.Shutdown(context.Background()); err != nil {
ts.Logger.Fatal(err)
}
}
// AutoEntryPoint.
func AutotelEntryPoint() {
}
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