/
main.go
122 lines (91 loc) · 2.48 KB
/
main.go
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package main
import (
"context"
"errors"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"go.uber.org/zap"
"golang.org/x/sync/errgroup"
"github.com/loghole/tracing"
"github.com/loghole/tracing/tracehttp"
"github.com/loghole/tracing/tracelog"
)
const (
jaegerURL = "udp://127.0.0.1:6831"
serverAddr = "127.0.0.1:38572"
)
func main() {
dev, err := zap.NewProduction(zap.AddStacktrace(zap.FatalLevel))
if err != nil {
panic(err)
}
logger := tracelog.NewTraceLogger(dev.Sugar())
serverExample := NewServerExample(logger)
exit := make(chan os.Signal, 1)
signal.Notify(exit, syscall.SIGINT, syscall.SIGTERM)
errGroup, ctx := errgroup.WithContext(context.Background())
errGroup.Go(func() error {
logger.Info(ctx, "start server")
return serverExample.ListenAndServe()
})
// Exit from app.
select {
case <-exit:
logger.Info(ctx, "stopping application")
case <-ctx.Done():
logger.Error(ctx, "stopping application with error")
}
serverExample.Stop()
if err := errGroup.Wait(); err != nil {
logger.Error(ctx, err)
}
}
type ServerExample struct {
server *http.Server
tracer *tracing.Tracer
logger tracelog.Logger
}
func NewServerExample(logger tracelog.Logger) *ServerExample {
tracer, err := tracing.NewTracer(tracing.DefaultConfiguration("example_server", jaegerURL))
if err != nil {
panic(err)
}
return &ServerExample{
tracer: tracer,
logger: logger,
}
}
func (e *ServerExample) ListenAndServe() error {
routes := http.NewServeMux()
routes.HandleFunc("/success", e.HandlerSuccess)
routes.HandleFunc("/error", e.HandlerError)
middleware := tracehttp.NewMiddleware(e.tracer)
e.server = &http.Server{Addr: serverAddr, Handler: middleware.Middleware(routes)}
return e.server.ListenAndServe()
}
func (e *ServerExample) Stop() {
if err := e.tracer.Close(); err != nil {
e.logger.Error(context.TODO(), "close tracer: ", err)
}
if err := e.server.Shutdown(context.Background()); err != nil {
if !errors.Is(err, http.ErrServerClosed) {
e.logger.Error(context.TODO(), "close server: ", err)
}
}
}
func (e *ServerExample) HandlerSuccess(w http.ResponseWriter, r *http.Request) {
var ctx = r.Context()
defer tracing.ChildSpan(&ctx).Finish()
time.Sleep(time.Millisecond * 500)
w.Write([]byte("OK"))
}
func (e *ServerExample) HandlerError(w http.ResponseWriter, r *http.Request) {
var ctx = r.Context()
defer tracing.ChildSpan(&ctx).Finish()
time.Sleep(time.Millisecond * 500)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Error"))
}