Is it possible to use Spark Java for live streaming?

I want to stream the captured audio of a microphone connected with my raspberry pi over the web browser to a client. Therefore I was thinking of using Spark as Java web server. I have already noticed that it would be possible to stream an already captured audio file over Spark.

My problem is that I don't know how to stream the audio of the microphone directly to the connected client. I would have to split the audio so that there is a buffer. But how can I realize this?

I would be happy for help.