ActiveGo 1.8Package opentracing
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func FromGRPCRequest ¶
func FromGRPCRequest(tracer opentracing.Tracer, operationName string, logger log.Logger) func(ctx context.Context, md metadata.MD) context.Context
FromGRPCRequest returns a grpc RequestFunc that tries to join with an OpenTracing trace found in `req` and starts a new Span called `operationName` accordingly. If no trace could be found in `req`, the Span will be a trace root. The Span is incorporated in the returned Context and can be retrieved with opentracing.SpanFromContext(ctx).
func FromHTTPRequest ¶
func FromHTTPRequest(tracer opentracing.Tracer, operationName string, logger log.Logger) kithttp.RequestFunc
FromHTTPRequest returns an http RequestFunc that tries to join with an OpenTracing trace found in `req` and starts a new Span called `operationName` accordingly. If no trace could be found in `req`, the Span will be a trace root. The Span is incorporated in the returned Context and can be retrieved with opentracing.SpanFromContext(ctx).
func ToGRPCRequest ¶
func ToGRPCRequest(tracer opentracing.Tracer, logger log.Logger) func(ctx context.Context, md *metadata.MD) context.Context
ToGRPCRequest returns a grpc RequestFunc that injects an OpenTracing Span found in `ctx` into the grpc Metadata. If no such Span can be found, the RequestFunc is a noop.
func ToHTTPRequest ¶
func ToHTTPRequest(tracer opentracing.Tracer, logger log.Logger) kithttp.RequestFunc
ToHTTPRequest returns an http RequestFunc that injects an OpenTracing Span found in `ctx` into the http headers. If no such Span can be found, the RequestFunc is a noop.
func TraceClient ¶
func TraceClient(tracer opentracing.Tracer, operationName string) endpoint.Middleware
TraceClient returns a Middleware that wraps the `next` Endpoint in an OpenTracing Span called `operationName`.
func TraceServer ¶
func TraceServer(tracer opentracing.Tracer, operationName string) endpoint.Middleware
TraceServer returns a Middleware that wraps the `next` Endpoint in an OpenTracing Span called `operationName`.
If `ctx` already has a Span, it is re-used and the operation name is overwritten. If `ctx` does not yet have a Span, one is created here.