The way I did it is this:
Client (most likely an applet) makes a programmatic request using
URLConnection. It then goes into reading loop and stays there until instructed
to get out by a SHUTDOWN message (I use simple messaging protocol not
serialization of class objects). It pieces together the messages received and
parses them.
The servlet takes the request and creates a wait/notify queue. That queue is
given to the 'processing engine' that puts messages onto the queue. The
'processing engine' is in a separate thread and it puts messages onto queues it
got from other requests (that are interested in the subject).
That queue acts as a link between the servlet writing the data to applet and
the 'processing engine' so it must be multithread safe.
There is a BIG overhead associated with this mechanism. It is the fact that
you have to keep an HTTP session open for as many clients as want data. It's
the concurrency of a large number of requests that stay around that's the
killer. If there is anyone here who might have done something like this and
has suggestions I would like to hear them.
d.
R�bert P�rhonyi wrote:
> Hi everybody,
>
> I'm looking for possibilities and strategies to send streaming data
> using a servlet.
> Any directions, urls, sample classes are welcome! Thanx.
>
> regards,
> Robert
>
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