io.opentracing

Interface SpanContext

public interface SpanContext

SpanContext represents Span state that must propagate to descendant Spans and across process boundaries. SpanContext is logically divided into two pieces: (1) the user-level "Baggage" that propagates across Span boundaries and (2) any Tracer-implementation-specific fields that are needed to identify or otherwise contextualize the associated Span instance (e.g., a <trace_id, span_id, sampled> tuple).

See Also:

Span.setBaggageItem(String, String), Span.getBaggageItem(String)

Method Summary

Modifier and Type	Method and Description
Iterable<Map.Entry<String,String>>	baggageItems()
String	toSpanId() Return the ID of the associated Span.
String	toTraceId() Return the ID of the trace.

Method Detail

toTraceId

String toTraceId()

Return the ID of the trace. Should be globally unique. Every span in a trace shares this ID. An empty String will be returned if the tracer does not support this functionality (this is the case for no-op tracers, for example). null is an invalid return value.

Returns:

the trace ID for this context.

toSpanId

String toSpanId()

Return the ID of the associated Span. Should be unique within a trace. Each span within a trace contains a different ID. An empty String will be returned if the tracer does not support this functionality (this is the case for no-op tracers, for example). null is an invalid return value.

Returns:

the Span ID for this context.

baggageItems

Iterable<Map.Entry<String,String>> baggageItems()

Returns:

all zero or more baggage items propagating along with the associated Span

See Also:

Span.setBaggageItem(String, String), Span.getBaggageItem(String)