AsyncRequestCallback (Spring Framework 4.3.30.RELEASE API)

```
public interface AsyncRequestCallback
```
Callback interface for code that operates on an AsyncClientHttpRequest. Allows to manipulate the request headers, and write to the request body.
Used internally by the AsyncRestTemplate, but also useful for application code.
Since:
4.0
Author:
Arjen Poutsma
See Also:
AsyncRestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.AsyncRequestCallback, org.springframework.web.client.ResponseExtractor<T>, java.lang.Object...)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`doWithRequest(AsyncClientHttpRequest request)`	Gets called by `AsyncRestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.AsyncRequestCallback, org.springframework.web.client.ResponseExtractor<T>, java.lang.Object...)` with an opened `ClientHttpRequest`.

- Method Detail
  - doWithRequest
```
void doWithRequest(AsyncClientHttpRequest request)
            throws IOException
```
    Gets called by AsyncRestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.AsyncRequestCallback, org.springframework.web.client.ResponseExtractor<T>, java.lang.Object...) with an opened ClientHttpRequest. Does not need to care about closing the request or about handling errors: this will all be handled by the RestTemplate.
    Parameters:
    request - the active HTTP request
    Throws:
    IOException - in case of I/O errors