SamplerFunction (Brave 5.13.9 API)

Type Parameters:

T - type of the input, for example a request or method

All Known Implementing Classes:

DeclarativeSampler, ParameterizedSampler
```
public interface SamplerFunction<T>
```
Decides whether to start a new trace based on request properties such as an HTTP path.
Ex. Here's a sampler that only traces api requests
```
{@code
 serverSampler = new SamplerFunction() {
```
Since:

5.8

See Also:

SamplerFunctions, Request

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Boolean trySample(T arg)
  Returns an overriding sampling decision for a new trace.

- Method Detail
  - trySample
```
@Nullable
Boolean trySample(@Nullable
                  T arg)
```
    Returns an overriding sampling decision for a new trace. Returning null is typically used to defer to the trace ID sampler.
    
    Parameters:
    
    arg - parameter to evaluate for a sampling decision. null input results in a null result
    
    Returns:
    
    true to sample a new trace or false to deny. Null defers the decision.
    
    Since:
    
    5.8