FileUploadResource.java

@Path("upload")
public class FileUploadResource {

    @Inject
    Event<FileEvent> fileEvent;

    @Consumes("application/pdf")
    @POST
    public Response uploadPdf(File file) {

        FileEvent fileEvent = new FileEvent(file, "pdf");
        Event<FileEvent> pdfEvent = this.fileEvent.select(new AnnotationLiteral<Pdf>() {
        });

        pdfEvent.fireAsync(fileEvent)
                .whenCompleteAsync((event, err) -> {

                    if (Objects.isNull(err)) {
                        System.out.println("PDF saved");
                    } else {
                        err.printStackTrace();
                    }
                    
                });
        return Response.ok().build();
    }

    @Consumes("image/jpeg")
    @POST
    public Response uploadJpg(File file) {

        FileEvent fileEvent = new FileEvent(file, "jpg");
        Event<FileEvent> jpgEvent = this.fileEvent.select(new AnnotationLiteral<Jpg>() {
        });

        jpgEvent.fireAsync(fileEvent)
                .whenCompleteAsync((event, err) -> {

                    if (Objects.isNull(err)) {
                        System.out.println("JPG saved");
                    } else {
                        err.printStackTrace();
                    }

                });
        return Response.ok().build();
    }

    @Consumes("application/zip")
    @POST
    public Response uploadZip(File file) {

        FileEvent fileEvent = new FileEvent(file, "zip");
        Event<FileEvent> zipEvent = this.fileEvent.select(new AnnotationLiteral<Zip>() {
        });

        zipEvent.fireAsync(fileEvent)
                .whenCompleteAsync((event, err) -> {

                    if (Objects.isNull(err)) {
                        System.out.println("PDF saved");
                    } else {
                        err.printStackTrace();
                    }

                });
        return Response.ok().build();
    }
}