/
foo.go
44 lines (37 loc) · 1.09 KB
/
foo.go
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package main
import (
"fmt"
"log"
"net/http"
"time"
"github.com/aptpod/opentracing-go-sandbox/lib"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
)
type Foo struct {
}
func (h *Foo) Serve() error {
// tracer の初期化
tracer, closer, err := lib.CreateTracer("foo-service")
if err != nil {
return err
}
defer closer.Close()
log.Println("start foo")
return http.ListenAndServe(fmt.Sprintf(":%d", portMapping["foo"]), http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Println("foo")
// SpanのExtract
spanCtx, _ := tracer.Extract(opentracing.HTTPHeaders, opentracing.HTTPHeadersCarrier(r.Header))
// リクエストからのSpanContextを引き継いで新しいSpanの開始
span := tracer.StartSpan("get_foo", ext.RPCServerOption(spanCtx))
defer span.Finish()
// タグ付け
ext.HTTPMethod.Set(span, r.Method)
ext.HTTPUrl.Set(span, r.URL.String())
<-time.After(time.Second)
w.WriteHeader(http.StatusOK)
w.Write([]byte(`{ "name" : "foo!" }`))
// タグ付け
ext.HTTPStatusCode.Set(span, http.StatusOK)
}))
}