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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: AccessLogValve pattern (timestamp, bytes sent and time taken)
Date Mon, 28 Feb 2011 15:57:05 GMT
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Antonios,

On 2/24/2011 11:28 AM, Antonios Kogias wrote:
> And I would like some clarification on "Depending on exactly where the
> Valve falls within the Valve chain and how the RequestDispatcher works
> with Valves, it may or may not include time to render the response at all."

If your servlet redirects to a dynamic response, then the time for the
first request necessarily does not include the time to render a response
(unless you consider issuing a 30x status to be "rendering the
response"). That seems clear to me.

On the other hand, your servlet can issue a "forward" which is
essentially a server-side redirect that allows a second (or third, or
fourth, ...) servlet to generate a response after the first servlet does
it's work. I'm not sure where the Valve chain fits into that (does the
AccessLogValve time the calls to each individual forward, or does it
time the entire request/response as the client sees it?), but the answer
to that question can significantly change the timings that you observe.

- -chris
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