Module io.helidon.tracing

Package io.helidon.tracing.spi

Interface TracerProvider

All Known Implementing Classes:

JaegerTracerProvider, TracerResolverProvider, ZipkinTracerProvider

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface TracerProvider

Java service to integrate various distributed tracers. The first tracer configured will be used.

Method Summary

Modifier and Type	Method	Description
TracerBuilder<?>	createBuilder()	Create a new builder for this tracer.
default Map<String,List<String>>	updateOutboundHeaders(Span currentSpan, Tracer tracer, SpanContext parentSpan, Map<String,List<String>> outboundHeaders, Map<String,List<String>> inboundHeaders)	Update headers for outbound requests.

Method Details

createBuilder

TracerBuilder<?> createBuilder()

Create a new builder for this tracer.

Returns:

a tracer builder

updateOutboundHeaders

default Map<String,List<String>> updateOutboundHeaders(Span currentSpan,
 Tracer tracer,
 SpanContext parentSpan,
 Map<String,List<String>> outboundHeaders,
 Map<String,List<String>> inboundHeaders)

Update headers for outbound requests. The outboundHeaders already contain injected from tracer via Tracer.inject(SpanContext, Format, Object). This is to enable fine grained tuning of propagated headers for each implementation.

Parameters:

currentSpan - Current span covering the outbound call

tracer - Tracer used

parentSpan - Parent span context (may be null)

outboundHeaders - Tracing headers map as configured by the tracer

inboundHeaders - Existing inbound headers (may be empty if not within a scope of a request)

Returns:

new map of outbound headers, defaults to tracing headers