using spring 3.2.1,

I found that the default flushModeType = Auto causing me issues as im trying to work on the object before persist it.

I tried to set the flushMode to COMMIT, but whenever it happens outside of a @Transactional method, it goes back to AUTO.

I tried set the flushMode as env var, and directly on the entityManager but gets the same behavior. whenever set the flushMode outside of transaction, it has no meaning.

entityManager.setFlushMode(FlushModeType.COMMIT);
System.out.println(entityManager.getFlushMode());

prints ‘AUTO’

updated:
the code been affected out of the auto flushmode:

private void insertImageToDB(String imagePath, Map<String, ImageMetaData> imageNameToMetaData, int numOfImages,
      int currentImage) {
    try {
      ImageDB imageDB = new ImageDB();
      imageDB.setGcsFullPath(imagePath);
      imageDB.setStatus(PENDING);

      setImageMetaData(imagePath, imageNameToMetaData, imageDB); //calling more setters in this method

      imagesRepository.save(imageDB); //this clause causing extra persistence. i can solve it locally by removing this, but preffer to work with explicitly 'save()' action in order to under where and when im doing the commit. 
      logger.debug("processed {}/{} images", currentImage, numOfImages);
    } catch (Exception e) {
      logger.error("failed to save image {}", imagePath, e);
    }
  }