Is there any trick for how to create an empty Rout...

# http4k

[leonhardt]

Is there any trick for how to create an empty RoutingHttpHandler? When I try to anything like routes(emptyList()) I get:

Exception in thread "main" java.lang.IllegalArgumentException: No routes added!

at org.http4k.routing.RoutingHandler.<init>(RoutingHandler.kt:19)

at org.http4k.routing.RoutingHttpHandler.<init>(http.kt:23)

[leonhardt]

My use case is assembling routes from different "route providers" that may or not produce any routes. For example, I have a "ClockProvider" that, when configured for test, exposes an endpoint to set a controlled clock and otherwise exposes no such endpoint.

routes(
  "/api" bind routes(
    "/login" bind Method.POST to authenticationEndpoints.login,
  ),
  clockProvider.routes, // trying to sometimes return no routes here
  uiEndpoints.routes,
)

[James Richardson]

One possible downside of that approach is that you cannot run multiple parallel tests, as there is only one time in the system. A different approach might be to have a per-request clock, which could be set in a filter. Various mechanisms could be used to ensure that this filter wasn't available in non-test environments.

[James Richardson]

That's not really answering your question, I realise.

[dave]

you can use an orElse bind { Response(NOT_FOUND} } as a default