@Override
	public BlobResource persist(BlobResource entity) throws Exception {
		BlobResource result = null;
		if (entity != null){
			logger.info("Bytes to write: " + entity.getBytes().length);
			logger.info("Mime type:  " + entity.getMimeType());
			if (entity.getBytes() != null){
				try {
			        FileService fileService = FileServiceFactory.getFileService();
			        AppEngineFile file = fileService.createNewBlobFile(entity.getMimeType());
					String path = file.getFullPath();
					file = new AppEngineFile(path);
					boolean lock = true;
					FileWriteChannel writeChannel = fileService.openWriteChannel(file, lock);
					// This time we write to the channel directly
					writeChannel.write(ByteBuffer.wrap(entity.getBytes()));
					writeChannel.closeFinally();
					BlobKey blobKey = fileService.getBlobKey(file);
					if (blobKey != null){ // Blob is assumed to be written already
						entity.setBlobKey(blobKey.getKeyString());
						Key<BlobResource> key = put(entity);
						try {
							result = get(key);
						} catch (Exception e) {
							throw new BlobResourceException("Error persisting entity");
						}
					}
					logger.info("Blob Key: " + blobKey.getKeyString());
				} catch (Exception e) {
					e.printStackTrace();
					throw new BlobResourceException();
				}
			} else {
				throw new NullValueException();
			}
		} else {
			throw new BlobResourceException();
		}
		return result;
	}