trace

Documentation

Index

• Constants
• Variables

Constants

const (
	OriginalTraceParentHeader string = "original-traceparent"
	TraceParentHeader         string = "traceparent"
)

Variables

var (
	// PreserveTraceParentHandler is a client stats.Handler that preserves the original
	// traceparent header in the outgoing context, with a different header name.
	//
	// This is useful when the next hop in the request chain (like Cloud Run) may lose span
	// information, and become an unreliable span. In those cases, we just use the original
	// traceparent header to associate child spans directly with the outgoing span here.
	PreserveTraceParentHandler stats.Handler = &preserveTraceParentHandler{}
)

var (
	// RestoreTraceParentHandler is a server stats.Handler that restores the traceparent
	// stored by the PreserveTraceParentHandler.
	RestoreTraceParentHandler stats.Handler = &restoreTraceParentHandler{}
)