[Play 2.5][JAVA] Moving files from temp folder in controller

[MJ]

I tried to implement files uploading. Which then have to be moved to different folder from temp folder in controller.

I managed to move them with java.nio , but this is blocking operation. How should I implement it in controller?

If I define controller like this, then everything is working,but it is blocking operation.

public Result processUpload(){ Http.MultipartFormData body = request().body().asMultipartFormData();
  if (body!=null) {
    Http.MultipartFormData.FilePart<File> picture = body.getFile("picture");
    Http.MultipartFormData.FilePart<File> pdf = body.getFile("pdf");
    try {
        filesService.copy(picture,pdf);
        return ok(Json.toJson(new TResult(true, messages.at("upload.sucess")))));
     } catch (ServiceExcpetion ex) {
        return internalServerError(Json.toJson(new TResult(false,ex.translate(messages)))));
     }
 }
 return internalServerError(Json.toJson(new TResult(false, messages.at("upload.fail"))));
}

Then I tried to define it like this, but my frontend fetch is always receiving 500 - Internal Server Error this way

public Result processUpload(){ Http.MultipartFormData body = request().body().asMultipartFormData();
  if (body!=null) {
    Http.MultipartFormData.FilePart<File> picture = body.getFile("picture");
    Http.MultipartFormData.FilePart<File> pdf = body.getFile("pdf");
    CompletableFuture.supplyAsync(() -> {
         try {
              if (filesService.copy(picture,pdf)) {
                 return true;
              } else {
                return false;
              }
          } catch (Exception e) {
              throw new CompletionException(e);
          }
     },ec.current()).thenApply(result -> {
          if (result) {
             return ok(Json.toJson(new TResult(true, messages.at("upload.sucess"))));
          } else {
             return internalServerError(Json.toJson(new TResult(false,messages.at("upload.fail"))));
          }
      }).exceptionally(throwable -> {
          if (throwable.getCause() instanceof ServiceExcpetion) {
              return badRequest(Json.toJson(new TResult(false,((ServiceExcpetion)throwable.getCause()).translate(messages))));
          } else {
              return internalServerError(Json.toJson(new TResult(false,messages.at("akcia.chybaKomunikacie"))));
          }
       }
   );
 }
 return CompletableFuture.completedFuture(internalServerError(Json.toJson(new TResult(false, messages.at("upload.fail")))));
}

Can someone provide me example how to implement blocking file copy?

[MJ]

I forgot to add , then my frontend is always receiving 500 - Internal Server Error , but when debugging controller never returns internal server error ,but clearly gets to "return ok()". Frontend recieve this error when I enter CompletableFuture.supplyAsync() block. 

[Will Sargent]

Have you looked at adding something to the Accumulator?

There's an example template in https://github.com/playframework/play-java-fileupload-example that may be helpful.

--

Will Sargent

Engineer, Lightbend, Inc.

will.s...@lightbend.com

On Sat, Mar 11, 2017 at 5:44 PM, MJ <mdon...@gmail.com> wrote:

I forgot to add , then my frontend is always receiving 500 - Internal Server Error , but when debugging controller never returns internal server error ,but clearly gets to "return ok()". Frontend recieve this error when I enter CompletableFuture.supplyAsync() block. 

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