Module io.helidon.tracing.jersey.client

Package io.helidon.tracing.jersey.client.internal

Class TracingContext

java.lang.Object

io.helidon.tracing.jersey.client.internal.TracingContext

public final class TracingContext
extends Object

Context for outbound tracing. This is an internal API used from jersey integration with Tracing (currently MP tracing), to share a ThreadLocal instance.

This class is mutable, to support chains of tracing filters that create additional spans and that need to update the parent span of this context.

Method Summary

Modifier and Type	Method	Description
static TracingContext	create(Tracer tracer, Map<String,List<String>> inboundHeaders)	Create a new tracing context with client tracing enabled.
static TracingContext	create(Tracer tracer, Map<String,List<String>> inboundHeaders, boolean clientEnabled)	Create a new tracing context.
Map<String,List<String>>	inboundHeaders()	Map of headers that were received by server for an inbound call, may be used to propagate additional headers fro outbound request.
SpanContext	parentSpan()	Parent span to use for new spans created.
void	parentSpan(SpanContext context)	Update the parent span - this may be used by filters that inject a new span between to original parent and the outbound call.
boolean	traceClient()	Whether client (outbound) calls should be traced.
Tracer	tracer()	Tracer to be used when creating new spans.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

create

public static TracingContext create(Tracer tracer,
 Map<String,List<String>> inboundHeaders)

Create a new tracing context with client tracing enabled.

Parameters:

tracer - tracer to use

inboundHeaders - inbound header to be used for context propagation

Returns:

a new tracing context (not associated with current thread)

See Also:

• parentSpan(io.helidon.tracing.SpanContext)

create

public static TracingContext create(Tracer tracer,
 Map<String,List<String>> inboundHeaders,
 boolean clientEnabled)

Create a new tracing context.

Parameters:

tracer - tracer to use

inboundHeaders - inbound header to be used for context propagation

clientEnabled - whether client tracing should be enabled or not

Returns:

a new tracing context (not associated with current thread)

See Also:

• parentSpan(SpanContext)

traceClient

public boolean traceClient()

Whether client (outbound) calls should be traced.

Returns:

true if tracing is enabled for client calls

parentSpan

public SpanContext parentSpan()

Parent span to use for new spans created.

Returns:

span context to act as a parent for newly created spans

tracer

public Tracer tracer()

Tracer to be used when creating new spans.

Returns:

tracer to use

inboundHeaders

public Map<String,List<String>> inboundHeaders()

Map of headers that were received by server for an inbound call, may be used to propagate additional headers fro outbound request.

Returns:

map of inbound headers

parentSpan

public void parentSpan(SpanContext context)

Update the parent span - this may be used by filters that inject a new span between to original parent and the outbound call.

Parameters:

context - new parent span context