SpanContextSupplier (Prometheus Java Span Context Supplier - Common 0.15.0 API)

```
public interface SpanContextSupplier
```

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  String getSpanId()
  
  String getTraceId()

- Method Detail
  - getTraceId
```
String getTraceId()
```
    Returns:
    
    the current trace id, or null if this call is not happening within a span context.
  - getSpanId
```
String getSpanId()
```
    Returns:
    
    the current span id, or null if this call is not happening within a span context.