Package org.springframework.web.client

Interface RequestCallback

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface RequestCallback

Callback interface for code that operates on a ClientHttpRequest. Allows manipulating the request headers, and write to the request body.

Used internally by the RestTemplate, but also useful for application code. There several available factory methods:

• RestTemplate.acceptHeaderRequestCallback(Class)
• RestTemplate.httpEntityCallback(Object)
• RestTemplate.httpEntityCallback(Object, Type)

Since:

3.0

Author:

Arjen Poutsma

See Also:

• RestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.RequestCallback, org.springframework.web.client.ResponseExtractor<T>, java.lang.Object...)

Method Summary

Modifier and Type	Method	Description
void	doWithRequest(ClientHttpRequest request)	Gets called by RestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.RequestCallback, org.springframework.web.client.ResponseExtractor<T>, java.lang.Object...) with an opened ClientHttpRequest.

Method Details

doWithRequest

void doWithRequest(ClientHttpRequest request)
            throws IOException

Gets called by RestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.RequestCallback, 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