Filip Hanik - Dev Lists wrote:
oh crap, we are thinking way different :), I was thinking the other way
around
Here is one event chain
1. CometProcessor.event(CometEvent.BEGIN/null)
2. Servlet calls CometEvent.setBlocking(false);
3. Servlet calls CometEvent.notify(READ) - the servlet wants to be
notified when data is available
4. Data arrives on the socket
5. CometProcessor.event(CometEvent.NOTIFY/READ)
6. Servlet calls a CometEvent.getHttpServletRequest().read()
7. Servlet calls CometEvent.notify(READ|WRITE); - this servlet wants to
be notified when it can write or read data
8. CometProcessor.event(CometEvent.NOTIFY/WRITE);
9. Servlet calls a CometEvent.getHttpServletResponse().write(bbuf)
10. Under the hood, write is being done when it can write until the
buffer is empty
11. CometProcessor.event(CometEvent.NOTIFY/WRITE_COMPLETE)
12. Servlet calls CometEvent.notify(WRITE); - notify me when I can write
again
13. Data arrives on the socket again
14. CometProcessor.event(CometEvent.NOTIFY/READ);
so this whole time I thought the notify() method is a call from the
servlet to the container.
The Comet servlet "register" actions it wants to be notified of.
And basically, this way, we disallow any writes or reads from a "user"
thread when the Poller is in use.
Ok, I am running away screaming in horror (and begging for mercy).
It's not acceptable to generate one event, along with plenty of API
interactions, for every write operation. The benefit I wanted to provide
is easy asynchronous writes. For example, let's say you want to send
something on all your connections (which is IMO quite common), and let's
say you have 10000. Having to generate 10000 events and process each of
them using one thread is extremely bad. To summarize, I don't want to
hear about sending write events until one write is incomplete, and async
writes should be allowed.
At this point, I think I will veto any change beyond tweaks to my
earlier proposal (which did not do non blocking IO). It would avoid a
lot of complexity, at least.
Is this too convuluted?
do you feel like we are spinning circles, starting over or simply making
it too complex?
Yes, I think it got a little bit out of hand, thanks for noticing it ;)
Rémy
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