HttpRuleSampler (Brave Instrumentation: Http Adapters 5.6.3 API)

java.lang.Object
- brave.http.HttpSampler
- - brave.http.HttpRuleSampler

```
public final class HttpRuleSampler
extends HttpSampler
```
Assigns sample rates to http routes.
Ex. Here's a sampler that traces 80% requests to /foo and 10% of POST requests to /bar. Other requests will use a global rate provided by the tracing component.
```
 httpTracingBuilder.serverSampler(HttpRuleSampler.newBuilder()
   .addRule(null, "/foo", 0.8f)
   .addRule("POST", "/bar", 0.1f)
   .build());
 
```
Note that the path is a prefix, so "/foo" will match "/foo/abcd".

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class HttpRuleSampler.Builder

Field Summary
- Fields inherited from class brave.http.HttpSampler
  NEVER_SAMPLE, TRACE_ID

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static HttpRuleSampler.Builder`	`newBuilder()`
`<Req> java.lang.Boolean`	`trySample(HttpAdapter<Req,?> adapter, Req request)`	Returns an overriding sampling decision for a new trace.

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

- Method Detail
  - newBuilder
```
public static HttpRuleSampler.Builder newBuilder()
```
  - trySample
```
public <Req> java.lang.Boolean trySample(HttpAdapter<Req,?> adapter,
                                         Req request)
```
    Description copied from class: HttpSampler
    
    Returns an overriding sampling decision for a new trace. Return null ignore the request and use the trace ID sampler.
    
    Specified by:
    
    trySample in class HttpSampler