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utils.go
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utils.go
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package tracing
import (
"context"
"encoding/json"
"github.com/ashkan-maleki/go-es-cqrs/pkg/es"
"github.com/opentracing/opentracing-go/ext"
"google.golang.org/grpc/metadata"
)
func StartHttpServerTracerSpan(c echo.Context, operationName string) (context.Context, opentracing.Span) {
spanCtx, err := opentracing.GlobalTracer().Extract(opentracing.HTTPHeaders, opentracing.HTTPHeadersCarrier(c.Request().Header))
if err != nil {
serverSpan := opentracing.GlobalTracer().StartSpan(operationName)
ctx := opentracing.ContextWithSpan(c.Request().Context(), serverSpan)
return ctx, serverSpan
}
serverSpan := opentracing.GlobalTracer().StartSpan(operationName, ext.RPCServerOption(spanCtx))
ctx := opentracing.ContextWithSpan(c.Request().Context(), serverSpan)
return ctx, serverSpan
}
func GetTextMapCarrierFromEvent(event es.Event) opentracing.TextMapCarrier {
metadataMap := make(opentracing.TextMapCarrier)
err := json.Unmarshal(event.GetMetadata(), &metadataMap)
if err != nil {
return metadataMap
}
return metadataMap
}
func StartProjectionTracerSpan(ctx context.Context, operationName string, event es.Event) (context.Context, opentracing.Span) {
textMapCarrierFromMetaData := GetTextMapCarrierFromEvent(event)
span, err := opentracing.GlobalTracer().Extract(opentracing.TextMap, textMapCarrierFromMetaData)
if err != nil {
serverSpan := opentracing.GlobalTracer().StartSpan(operationName)
ctx = opentracing.ContextWithSpan(ctx, serverSpan)
return ctx, serverSpan
}
serverSpan := opentracing.GlobalTracer().StartSpan(operationName, ext.RPCServerOption(span))
ctx = opentracing.ContextWithSpan(ctx, serverSpan)
return ctx, serverSpan
}
func GetTextMapCarrierFromMetaData(ctx context.Context) opentracing.TextMapCarrier {
metadataMap := make(opentracing.TextMapCarrier)
if md, ok := metadata.FromIncomingContext(ctx); ok {
for key := range md.Copy() {
metadataMap.Set(key, md.Get(key)[0])
}
}
return metadataMap
}
func StartGrpcServerTracerSpan(ctx context.Context, operationName string) (context.Context, opentracing.Span) {
textMapCarrierFromMetaData := GetTextMapCarrierFromMetaData(ctx)
span, err := opentracing.GlobalTracer().Extract(opentracing.TextMap, textMapCarrierFromMetaData)
if err != nil {
serverSpan := opentracing.GlobalTracer().StartSpan(operationName)
ctx = opentracing.ContextWithSpan(ctx, serverSpan)
return ctx, serverSpan
}
serverSpan := opentracing.GlobalTracer().StartSpan(operationName, ext.RPCServerOption(span))
ctx = opentracing.ContextWithSpan(ctx, serverSpan)
return ctx, serverSpan
}
func InjectTextMapCarrier(spanCtx opentracing.SpanContext) (opentracing.TextMapCarrier, error) {
m := make(opentracing.TextMapCarrier)
if err := opentracing.GlobalTracer().Inject(spanCtx, opentracing.TextMap, m); err != nil {
return nil, err
}
return m, nil
}
func ExtractTextMapCarrier(spanCtx opentracing.SpanContext) opentracing.TextMapCarrier {
textMapCarrier, err := InjectTextMapCarrier(spanCtx)
if err != nil {
return make(opentracing.TextMapCarrier)
}
return textMapCarrier
}
func ExtractTextMapCarrierBytes(spanCtx opentracing.SpanContext) []byte {
textMapCarrier, err := InjectTextMapCarrier(spanCtx)
if err != nil {
return []byte("")
}
dataBytes, err := json.Marshal(&textMapCarrier)
if err != nil {
return []byte("")
}
return dataBytes
}
func InjectTextMapCarrierToGrpcMetaData(ctx context.Context, spanCtx opentracing.SpanContext) context.Context {
if textMapCarrier, err := InjectTextMapCarrier(spanCtx); err == nil {
md := metadata.New(textMapCarrier)
ctx = metadata.NewOutgoingContext(ctx, md)
}
return ctx
}
func TraceErr(span opentracing.Span, err error) {
span.SetTag("error", true)
span.LogKV("error_code", err.Error())
}