/
main.go
76 lines (69 loc) · 1.66 KB
/
main.go
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package main
import (
"context"
"fmt"
"io"
"log"
"net/http"
"os"
"time"
httptrace "gopkg.in/DataDog/dd-trace-go.v1/contrib/net/http"
"gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
)
func getContent(ctx context.Context) error {
req, err := http.NewRequestWithContext(ctx, "GET", "https://httpbin.org/get", nil)
if err != nil {
return fmt.Errorf("failed to request: %w", err)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return fmt.Errorf("failed to get: %w", err)
}
defer resp.Body.Close()
b, err := io.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("failed to read: %w", err)
}
log.Printf("got: %s", b)
return nil
}
func do(ctx context.Context) error {
if err := getContent(ctx); err != nil {
return fmt.Errorf("failed to get content: %w", err)
}
time.Sleep(10 * time.Second)
if err := getContent(ctx); err != nil {
return fmt.Errorf("failed to get content: %w", err)
}
time.Sleep(10 * time.Second)
if err := getContent(ctx); err != nil {
return fmt.Errorf("failed to get content: %w", err)
}
time.Sleep(10 * time.Second)
if err := getContent(ctx); err != nil {
return fmt.Errorf("failed to get content: %w", err)
}
return nil
}
func run() int {
tracer.Start(tracer.WithService("hello-datadog-apm"))
defer func() {
tracer.Stop()
}()
httptrace.WrapClient(http.DefaultClient)
ctx := context.Background()
span, ctx := tracer.StartSpanFromContext(ctx, "run")
err := do(ctx)
span.Finish(tracer.WithError(err))
if err != nil {
log.Printf("error: %s", err)
return 1
}
return 0
}
func main() {
log.SetFlags(log.Lmicroseconds | log.Lshortfile)
code := run()
log.Printf("Exiting with code %d", code)
os.Exit(code)
}