RequestListener (instrumentation-api 1.4.1 API)

All Known Implementing Classes:

HttpClientMetrics, HttpServerMetrics
```
public interface RequestListener
```
A listener of the start and end of a request. Instrumented libraries will call start(Context, Attributes) as early as possible in the processing of a request and end(Context, Attributes) as late as possible when finishing the request. These correspond to the start and end of a span when tracing.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`end(io.opentelemetry.context.Context context, io.opentelemetry.api.common.Attributes responseAttributes)`	Listener method that is called at the end of a request.
`io.opentelemetry.context.Context`	`start(io.opentelemetry.context.Context context, io.opentelemetry.api.common.Attributes requestAttributes)`	Listener method that is called at the start of a request.

Method Detail

start
```
io.opentelemetry.context.Context start(io.opentelemetry.context.Context context,
                                       io.opentelemetry.api.common.Attributes requestAttributes)
```
Listener method that is called at the start of a request. If any state needs to be kept between the start and end of the request, e.g., an in-progress span, it should be added to the passed in Context and returned.

end

void end(io.opentelemetry.context.Context context,
         io.opentelemetry.api.common.Attributes responseAttributes)

Listener method that is called at the end of a request.