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opentracing.go
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opentracing.go
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package opentracing
import (
"context"
"fmt"
"strings"
"github.com/alexfalkowski/go-service/trace/opentracing/datadog"
"github.com/alexfalkowski/go-service/trace/opentracing/jaeger"
"github.com/alexfalkowski/go-service/version"
otr "github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"go.uber.org/fx"
)
// StartSpanFromContext for opentracing.
func StartSpanFromContext(ctx context.Context, tracer otr.Tracer, kind, operation, method string, opts ...otr.StartSpanOption) (context.Context, otr.Span) {
fullMethod := fmt.Sprintf("%s %s", strings.ToLower(operation), strings.ToLower(method))
clientSpan, ctx := otr.StartSpanFromContextWithTracer(ctx, tracer, fullMethod, opts...)
ext.SpanKind.Set(clientSpan, ext.SpanKindEnum(kind))
return otr.ContextWithSpan(ctx, clientSpan), clientSpan
}
// TracerParams for opentracing.
type TracerParams struct {
Lifecycle fx.Lifecycle
Name string
Version version.Version
Config *Config
}
// NewTracer for opentracing.
func NewTracer(params TracerParams) (otr.Tracer, error) {
if params.Config.IsJaeger() {
return jaeger.NewTracer(jaeger.TracerParams{Lifecycle: params.Lifecycle, Name: params.Name, Version: params.Version, Host: params.Config.Host})
}
if params.Config.IsDataDog() {
return datadog.NewTracer(datadog.TracerParams{Lifecycle: params.Lifecycle, Name: params.Name, Version: params.Version, Host: params.Config.Host}), nil
}
return otr.NoopTracer{}, nil
}