BraveSpanContext (Zipkin OpenTracing Brave 0.37.4 API)

java.lang.Object
- brave.opentracing.BraveSpanContext

All Implemented Interfaces:

io.opentracing.SpanContext
```
public abstract class BraveSpanContext
extends Object
implements io.opentracing.SpanContext
```
Holds the TraceContext used by the underlying Tracer, or an {link TraceContextOrSamplingFlags extraction result if an incoming context}. An unsampled context results in a noop span.
This type also includes hooks to integrate with the underlying Tracer. Ex you can access the underlying trace context with unwrap()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract Iterable<Map.Entry<String,String>>`	`baggageItems()`	Returns empty unless `BaggagePropagation` is in use
`abstract brave.propagation.TraceContext`	`unwrap()`	Returns the underlying trace context for use in Brave apis, or null if this object does not represent a span.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.opentracing.SpanContext
toSpanId, toTraceId

- Method Detail
  - unwrap
```
public abstract brave.propagation.TraceContext unwrap()
```
    Returns the underlying trace context for use in Brave apis, or null if this object does not represent a span.
    When a span context is returned from BraveSpan.context(), there's no ambiguity. It represents the current span. However, a span context can be in an intermediate state when extracted from headers. In other words, unwrap might not have a TraceContext to return.
    Why? Extraction from headers can return partial info. For example, in Amazon Web Services, you may be suggested just a trace ID. In other cases, you might just inherit baggage or a sampling hint.
  - baggageItems
```
public abstract Iterable<Map.Entry<String,String>> baggageItems()
```
    Returns empty unless BaggagePropagation is in use
    
    Specified by:
    
    baggageItems in interface io.opentracing.SpanContext