Java EE 8 Design Patterns and Best Practices

The FIleUploadResource class

In the following code block, we have the JFileUploadResource class, which uses JAX-RS and is a REST service:

import javax.enterprise.event.Event;import javax.enterprise.util.AnnotationLiteral;import javax.inject.Inject;import javax.ws.rs.Consumes;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.core.Response;import java.io.File;import java.util.Objects;@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 ...