/
jaeger.go
65 lines (60 loc) · 1.76 KB
/
jaeger.go
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package main
import (
"context"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go"
jaegercfg "github.com/uber/jaeger-client-go/config"
jaegerlog "github.com/uber/jaeger-client-go/log"
"github.com/uber/jaeger-lib/metrics"
"gopkg.in/cfchou/go-gentle.v3/gentle"
"log"
"time"
)
func main() {
jLogger := jaegerlog.StdLogger
jMetricsFactory := metrics.NullFactory
// Sample configuration for testing. Use constant sampling to sample every trace
// and enable LogSpan to log every span via configured Logger.
jConf := jaegercfg.Configuration{
Sampler: &jaegercfg.SamplerConfig{
Type: jaeger.SamplerTypeConst,
Param: 1,
},
Reporter: &jaegercfg.ReporterConfig{
LogSpans: true,
},
}
// Initialize tracer with a logger and a metrics factory
closer, err := jConf.InitGlobalTracer(
"extra",
jaegercfg.Logger(jLogger),
jaegercfg.Metrics(jMetricsFactory),
)
if err != nil {
log.Printf("Could not initialize jaeger tracer: %s", err.Error())
return
}
defer closer.Close()
var upstream gentle.SimpleStream = func(ctx context.Context) (gentle.Message, error) {
prevSpan := opentracing.SpanFromContext(ctx)
if prevSpan == nil {
log.Println("No span in Context")
return gentle.SimpleMessage(""), nil
}
span, ctx := opentracing.StartSpanFromContext(ctx, "Get")
defer span.Finish()
time.Sleep(200 * time.Millisecond)
return gentle.SimpleMessage(""), nil
}
opts := gentle.NewRateLimitedStreamOpts("", "test1",
gentle.NewTokenBucketRateLimit(time.Second, 1))
stream := gentle.NewRateLimitedStream(opts, upstream)
log.Println("Start")
for i := 0; i < 10; i++ {
ctx := context.Background()
span, ctxTraced := opentracing.StartSpanFromContext(ctx, "Get")
stream.Get(ctxTraced)
span.Finish()
}
log.Println("End")
}