@Override
    public synchronized boolean writeQueueFull() {
        return isBufferFull;
    }
Implementation of vertx {@link io.vertx.core.streams.WriteStream} that handles data chunks (from {@link io.vertx.core.streams.ReadStream}) and writes them to the blob storage.
If file content is bigger than 5MB - multipart upload will be used.
Chunk size can be configured via {@link #setWriteQueueMaxSize(int)} method, but should be no less than 5 MB according to the s3 specification.
If any exception is caught in between - multipart upload will be aborted.
server/src/main/java/com/epam/aidial/core/server/vertx/stream/BlobWriteStream.java