org.forgerock.http

Interface Handler

All Known Subinterfaces:

DescribableHandler

All Known Implementing Classes:

HttpClientHandler, Router

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 Handler

Asynchronously handles an HTTP Request by producing an associated Response.

Method Summary

Modifier and Type	Method and Description
Promise<Response,NeverThrowsException>	handle(Context context, Request request) Returns a Promise representing the asynchronous Response of the given request.

Method Detail

handle

Promise<Response,NeverThrowsException> handle(Context context,
                                              Request request)

Returns a Promise representing the asynchronous Response of the given request. If any (asynchronous) processing goes wrong, the promise still contains a Response (probably from the 4xx or 5xx status code family).

A handler that doesn't hand-off the processing to another downstream handler is responsible for creating the response.

The returned Promise contains the response returned from the server as-is. This is responsibility of the handler to produce the appropriate error response (404, 500, ...) in case of processing error.

Note: As of Promise 2.0 implementation, it is not permitted to throw any runtime exception here. Doing so produce unexpected behaviour (most likely a server-side hang of the processing thread).

Parameters:

context - The request context.

request - The request.

Returns:

A Promise representing the response to be returned to the caller.