I sincerely doubt that each chunk would result in a call to doPost().

More likely, you would do something like

InputStream is = request.getInputStream();
byte[] buff = new byte[BUFFSIZE];
int got;
while ((got = is.read(buff) > -1) {
  // do something with the data
}

Your InputStream.read(buff) will just block until the next chunk
arrives. Tomcat will take care of unchunking the data as it arrives, so
you would simply see a transparent stream of bytes, with some pauses in
between chunks, perhaps.

Note that you might have to deal with timeouts if the delay between
chunks is too long, and I'm not entirely sure whether streaming a
response at the same time as reading the input is allowed.

Rogan

I'm not sure, but I don't think it would work. I think the server waits
until the request is complete to give it to your application, and as far
as I know a streaming type for request doesn't exist.
What I would try is probably just to call the servlet every time. That
makes it probably a bit slower, but more stable.