/
hoge.go
71 lines (60 loc) · 1.71 KB
/
hoge.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"
tracelog "github.com/opentracing/opentracing-go/log"
)
type Hoge struct {
}
func (h *Hoge) Serve() error {
// tracer の初期化
tracer, closer, err := lib.CreateTracer("hoge-service")
if err != nil {
return err
}
defer closer.Close()
cli := &ServiceClient{
tracer: tracer,
}
log.Println("start hoge")
// :18081でServe
return http.ListenAndServe(fmt.Sprintf(":%d", portMapping["hoge"]), http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Println("hoge")
// 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_hoge", ext.RPCServerOption(spanCtx))
defer span.Finish()
// タグ付け
ext.HTTPMethod.Set(span, r.Method)
ext.HTTPUrl.Set(span, r.URL.String())
span.SetTag("hoge_tag", "hoge_tag_value")
// Key-Value形式で簡易指定
span.LogKV(
"hoge.log.key1", "hoge-log",
"hoge.log.key2", "hoge-log2",
)
// 型情報ありの指定
span.LogFields(
tracelog.String("hoge.logfields.string", "hoge-log"),
tracelog.Bool("hoge.logfields.bool", true),
)
// ctxにセット
ctx := r.Context()
ctx = opentracing.ContextWithSpan(ctx, span)
// APIコール
_, _ = cli.Call(ctx, "foo")
_, _ = cli.Call(ctx, "fuga")
// ダミー処理
<-time.After(time.Second)
w.WriteHeader(http.StatusOK)
w.Write([]byte(`{ "name": "hoge!" }`))
// タグ付け
ext.HTTPStatusCode.Set(span, http.StatusOK)
}))
}