public void doGet(HttpServletRequest request,
	HttpServletResponse response) throws ServletException, IOException
{

	// blocking file I/O
	InputStream fileIs = new FileInputStream("/path/to/file");

	// blocking network I/O
	URLConnection urlConnection = (new URL("http://example.com/example-microservice")).openConnection();
	InputStream netIs = urlConnection.getInputStream();

	// some more blocking network I/O
out.println("...");
}