## Removed features

- `SpanLogger`
  - Name pattern of Span Logger will not be applicable
- `Sampler`
  - TODO: describe the new sampling mechanism

## Sleuth's Tracer to brave.Tracing

Before

```
import org.springframework.cloud.sleuth.Tracer;

Tracer tracer;
```

After

```
import brave.Tracing;

Tracing tracing;
```

## Child span creation

Before

```
Span child = tracer.createSpan("name");
```

After

```
// tracing is brave.Tracing injected instead of Sleuth's Tracer
brave.Span span = tracing.tracer().nextSpan().name("name");
```

## Span closing

Before

```
Span child = tracer.createSpan("name");
try {
  // do sth
} finally {
  tracer.close(child);
}
```

After

```
// tracing is brave.Tracing injected instead of Sleuth's Tracer
brave.Span span = this.tracing.tracer().nextSpan().name("name");
try {
  // do sth
} finally {
  span.finish();
}
```

## Span tagging

Before

```
tracer.addTag("foo", "bar");
```

After

```
// tracing is brave.Tracing injected instead of Sleuth's Tracer
this.tracing.tracer().currentSpan().tag("foo", "bar");
```