package opentracing import ( "context" ) // TracerContextWithSpanExtension is an extension interface that the // implementation of the Tracer interface may want to implement. It // allows to have some control over the go context when the // ContextWithSpan is invoked. // // The primary purpose of this extension are adapters from opentracing // API to some other tracing API. type TracerContextWithSpanExtension interface { // ContextWithSpanHook gets called by the ContextWithSpan // function, when the Tracer implementation also implements // this interface. It allows to put extra information into the // context and make it available to the callers of the // ContextWithSpan. // // This hook is invoked before the ContextWithSpan function // actually puts the span into the context. ContextWithSpanHook(ctx context.Context, span Span) context.Context }