Running FFMPEG and FFserver from Glassfish Java Servlet

I'm planning to design a web interface to control my FFserver remotely. The question is, is it possible to start/stop the FFserver running on my Linux server using a Servlet running on the same machine?

I'm using Glassfish server and Java EE 7 for my web application. Currently I managed to get my web app to obtain http streams (which are started manually in terminal with predefined config file) and play them on the web. However, now I want to find a way to stop the streams and start the streams on demand.

Is it possible for me to run a Bash script via the servlet? Or are there any better solutions which allows Servlets to run linux commands in the servlet?

Many thanks in advanced!