code: private UploadResult uploadInOneChunk() {
          PutObjectResult putObjectResult = s3.putObject(origReq);
  
          UploadResult uploadResult = new UploadResult();
          uploadResult.setBucketName(origReq.getBucketName());
          uploadResult.setKey(origReq.getKey());
          uploadResult.setETag(putObjectResult.getETag());
          uploadResult.setVersionId(putObjectResult.getVersionId());
          return uploadResult;
      }
docs: Uploads the given request in a single chunk and returns the result.