RateByServiceSampler

All Implemented Interfaces:

com.datadog.trace.common.sampling.PrioritySampler , com.datadog.trace.common.sampling.Sampler
```
public class RateByServiceSampler
 implements Sampler, PrioritySampler
                    
```
A rate sampler which maintains different sample rates per service+env name.
The configuration of (serviceName,env)->rate is configured by the core agent.

Field Summary

Fields
Modifier and Type	Field	Description
`public final static String`	`SAMPLING_AGENT_RATE`

Constructor Summary

Constructors
Constructor	Description
`RateByServiceSampler()`
`RateByServiceSampler(Double defaultSampleRate)`

Method Summary

Modifier and Type	Method	Description
`boolean`	`sample(DDSpan span)`	Sample a collection of traces based on the parent span
`void`	`setSamplingPriority(DDSpan span)`	If span is a root span, set the span context samplingPriority to keep or drop

Methods inherited from class com.datadog.trace.common.sampling.Sampler
sample
Methods inherited from class com.datadog.trace.common.sampling.PrioritySampler
setSamplingPriority
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RateByServiceSampler
```
RateByServiceSampler()
```
  - RateByServiceSampler
```
RateByServiceSampler(Double defaultSampleRate)
```
- Method Detail
  - sample
```
 boolean sample(DDSpan span)
```
    Sample a collection of traces based on the parent span
    
    Parameters:
    
    span - the parent span with its context
  - setSamplingPriority
```
 void setSamplingPriority(DDSpan span)
```
    If span is a root span, set the span context samplingPriority to keep or drop