do not log "SpanContext not found in Extract carrier" as this is expected behavior if client is not instrumented
Bas van Beek
7 years ago
| 14 | 14 |
// ToGRPCRequest returns a grpc RequestFunc that injects an OpenTracing Span
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| 15 | 15 |
// found in `ctx` into the grpc Metadata. If no such Span can be found, the
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| 16 | 16 |
// RequestFunc is a noop.
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| 17 | |
//
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| 18 | |
// The logger is used to report errors and may be nil.
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| 19 | 17 |
func ToGRPCRequest(tracer opentracing.Tracer, logger log.Logger) func(ctx context.Context, md *metadata.MD) context.Context {
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| 20 | 18 |
return func(ctx context.Context, md *metadata.MD) context.Context {
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| 21 | 19 |
if span := opentracing.SpanFromContext(ctx); span != nil {
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| 33 | 31 |
// `operationName` accordingly. If no trace could be found in `req`, the Span
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| 34 | 32 |
// will be a trace root. The Span is incorporated in the returned Context and
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| 35 | 33 |
// can be retrieved with opentracing.SpanFromContext(ctx).
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| 36 | |
//
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| 37 | |
// The logger is used to report errors and may be nil.
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| 38 | 34 |
func FromGRPCRequest(tracer opentracing.Tracer, operationName string, logger log.Logger) func(ctx context.Context, md *metadata.MD) context.Context {
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| 39 | 35 |
return func(ctx context.Context, md *metadata.MD) context.Context {
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| 40 | 36 |
var span opentracing.Span
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| 41 | 37 |
wireContext, err := tracer.Extract(opentracing.TextMap, metadataReaderWriter{md})
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| 42 | |
if err != nil {
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|
38 |
if err != nil && err != opentracing.ErrSpanContextNotFound {
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| 43 | 39 |
logger.Log("err", err)
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| 44 | 40 |
}
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| 45 | 41 |
span = tracer.StartSpan(operationName, ext.RPCServerOption(wireContext))
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| 15 | 15 |
// ToHTTPRequest returns an http RequestFunc that injects an OpenTracing Span
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| 16 | 16 |
// found in `ctx` into the http headers. If no such Span can be found, the
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| 17 | 17 |
// RequestFunc is a noop.
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| 18 | |
//
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| 19 | |
// The logger is used to report errors and may be nil.
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| 20 | 18 |
func ToHTTPRequest(tracer opentracing.Tracer, logger log.Logger) kithttp.RequestFunc {
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| 21 | 19 |
return func(ctx context.Context, req *http.Request) context.Context {
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| 22 | 20 |
// Try to find a Span in the Context.
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| 51 | 49 |
// `operationName` accordingly. If no trace could be found in `req`, the Span
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| 52 | 50 |
// will be a trace root. The Span is incorporated in the returned Context and
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| 53 | 51 |
// can be retrieved with opentracing.SpanFromContext(ctx).
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| 54 | |
//
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| 55 | |
// The logger is used to report errors and may be nil.
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| 56 | 52 |
func FromHTTPRequest(tracer opentracing.Tracer, operationName string, logger log.Logger) kithttp.RequestFunc {
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| 57 | 53 |
return func(ctx context.Context, req *http.Request) context.Context {
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| 58 | 54 |
// Try to join to a trace propagated in `req`.
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| 61 | 57 |
opentracing.TextMap,
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| 62 | 58 |
opentracing.HTTPHeaderTextMapCarrier(req.Header),
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| 63 | 59 |
)
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| 64 | |
if err != nil {
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|
60 |
if err != nil && err != opentracing.ErrSpanContextNotFound {
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| 65 | 61 |
logger.Log("err", err)
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| 66 | 62 |
}
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| 67 | 63 |
span = tracer.StartSpan(operationName, ext.RPCServerOption(wireContext))
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