Akka-http directive for running code after response is sent?

[Daniel Armak]

Is there a way to be notified when a response has been sent to the client?

I’d like to cleanup some resources used to produce the response after I know it has been sent and that the non-strict HttpEntity I created will not be accessed again. After the cleanup runs, trying to materialize the entity data stream again would fail.
The closest approximation I’ve found so far is to use mapRouteResult to call response.entity.transformDataBytes and use Flow.concat to run the code when the stream has been consumed (or fails). This seems imperfect, because it’s possible that the entity will be consumed more than once (in other word, the entity stream might be materialized more than once), e.g. by a badly coded outer directive. I’m not really worried that this will happen (without my tests catching it), but if there’s a better way I’d like to know about it.

Thanks,

​

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Daniel Armak

[Martynas Mickevičius]

Hi,

if you complete a request with a `Source` you can attach cleanup actions using watchTermination.

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