[2.2.2 Java] How to set HTTP status code asynchronously e.g. in Chunks class

[Donghwan Kim]

Hello,

How can I do that? Should I set that in return statement? Technically speaking, response headers including status code is able to be set before the first call `out.write`. For the purpose and longer context, see http://flowersinthesand.github.io/wes/

```java

@BodyParser.Of(BodyParser.TolerantText.class)

public static Result http() {

  final Request request = request();

  final Response response = response();

  // How can I defer this?

  return ok(new Chunks<String>(JavaResults.writeString(Codec.utf_8())) {

    @Override

    public void onReady(Chunks.Out<String> out) {

      // The user should be able to set response status code here. e.g. http.setStatus(HttpStatus.NOT_IMPLEMENTED);

      new PlayServerHttpExchange(request, response, out);

    }

  });

}

```

Thanks in advance,

-- Donghwan

[Alberto Souza]

I don't know how to you :( but, just for curiosity, is this possible? I mean, you started to write the response already. Why don't you use some custom header to indicate a possible problem? Is it a possible solution?

Alberto Souza

www.caelum.com.br
www.leanpub.com/playframeworknapratica
www.alots.wordpress.com/

[Donghwan Kim]

Once the response header is written, it's not possible but it can be deferred till the first chunk, out.write(chunk), and be flushed together. You can see more discussion at https://github.com/playframework/playframework/issues/2711

Because the purpose of this is to make an abstraction layer for I/O in Java frameworks that is explained in the wes site. Using custom header is not meaningful. I will check if Promise class can solve this problem. Thanks for your answer.

-- Donghwan

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