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Posted to users@wicket.apache.org by Hendy Irawan <he...@soluvas.com> on 2014/06/13 10:18:49 UTC
How to get PageClass from BufferedResponseRequestHandler ? And how
to "link" related requests?
Hi,
How to get PageClass from BufferedResponseRequestHandler ?
At little background: I'm sending processing metrics to Google Analytics,
mentioning the PageClass (if available), used memory, and processing time.
I'm using RequestCycleListener to do the crux of this.
When Wicket's using IPageClassRequestHandler, things are fine.
However, on the "second request" (after redirect to ?pageVersion), Wicket's
using BufferedResponseRequestHandler, and I can't get the PageClass.
A related question is how do I "link" related requests? Logically, I want
this to happen:
1. User navigates to /contact
2. [http-thread-1] Begin RequestGroup -> sets starting mem usage, page
class, etc.
3. [http-thread-1] page processing
4. Wicket redirects to /contact?0
5. [http-thread-2] page rendered
6. [http-thread-2] End RequestGroup -> calculates mem usage, etc. between
#2..#6
I tried to use ThreadLocal but since thread is different, the information
stored in step #2 is lost.
Thank you.
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Hendy Irawan <he...@soluvas.com>.
Thank you Martin.
Currently I went with this solution:
https://github.com/soluvas/soluvas-web/blob/3c3cb8a923e06522ccee156725196a8ab15fba0b/site/src/main/java/org/soluvas/web/site/metrics/ThreadMetricsRequestCycleListener.java
I'll follow your advice and just ignored it, then :)
Hendy
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Hendy Irawan <he...@soluvas.com>.
Thank you Martin!
Filed https://issues.apache.org/jira/browse/WICKET-5621
Hendy
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Martin Grigorov <mg...@apache.org>.
Hi,
You are correct!
It seems org.apache.wicket.response.filter.ServerAndClientTimeFilter and
the other similar filters lie because they use the current request cycle's
begin time. And as I said the processing time when there is a buffered
response should be quite small.
I agree that the reported time at the moment is not very useful.
It seems we need to store more information to/with BufferedWebResponse to
be able to cover the requirements in this mail thread and
https://issues.apache.org/jira/browse/WICKET-5129.
Please file a ticket.
Martin Grigorov
Wicket Training and Consulting
On Tue, Jun 17, 2014 at 2:04 AM, Hendy Irawan <he...@soluvas.com> wrote:
> It seems ignoring BufferedResponseRequestHandler is harder than I thought
> because IResponseFilter is only called during
> BufferedResponseRequestHandler, not during the preceding
> IPageRequestHandler.
>
> What is the best way to achieve my goal? i.e. during the begin and end of
> IPageRequestHandler I need to perform tasks
> (i.e. noting the start values, calculating the delta of values during
> request processing, and then manipulate the response).
>
> for begin and end we have RequestCycleListener.onRequestHandlerResolved and
> onEndRequest, but I don't know how to manipulate the response there (in
> onEndRequest)??
>
> The response manipulation is quite simple (adding dynamic JavaScripts
> before
> </body>) but I'd like to do it in CPU-efficient way if possible.
>
> Hendy
>
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> http://apache-wicket.1842946.n4.nabble.com/How-to-get-PageClass-from-BufferedResponseRequestHandler-And-how-to-link-related-requests-tp4666247p4666282.html
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Hendy Irawan <he...@soluvas.com>.
It seems ignoring BufferedResponseRequestHandler is harder than I thought
because IResponseFilter is only called during
BufferedResponseRequestHandler, not during the preceding
IPageRequestHandler.
What is the best way to achieve my goal? i.e. during the begin and end of
IPageRequestHandler I need to perform tasks
(i.e. noting the start values, calculating the delta of values during
request processing, and then manipulate the response).
for begin and end we have RequestCycleListener.onRequestHandlerResolved and
onEndRequest, but I don't know how to manipulate the response there (in
onEndRequest)??
The response manipulation is quite simple (adding dynamic JavaScripts before
</body>) but I'd like to do it in CPU-efficient way if possible.
Hendy
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Martin Grigorov <mg...@apache.org>.
Hi,
Yes, ThreadLocal, request attribute and request cycle's metadata won't do
it.
You can store this data in the Session but you must be careful because you
may have several requests (e.g. Ajax) in the same session simultaneously.
Using the request parameters is also possible but then this data will be
visible to your end users ...
Yet another way (a bit more hidden) is to use a cookie but again you should
be careful to not mix the data for two separate requests.
You can also use the url from the second request (after the redirect) to
extract which page would be responsible for it but this will add both CPU
and memory to your end data.
I think you can just ignore the requests that are handled by
BufferedResponseRequestHandler. They are fast because they just write the
buffered response (some markup in memory) to the http response. There is
almost no processing here.
Martin Grigorov
Wicket Training and Consulting
On Fri, Jun 13, 2014 at 10:51 AM, Hendy Irawan <he...@soluvas.com> wrote:
> I also tried requestCycle.setMetaData() but the metadata is also gone for
> the
> next related request. :(
>
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Hendy Irawan <he...@soluvas.com>.
I also tried requestCycle.setMetaData() but the metadata is also gone for the
next related request. :(
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Re: How to get PageClass from BufferedResponseRequestHandler ? And
how to "link" related requests?
Posted by Sven Meier <sv...@meiers.net>.
Hi,
BufferedResponseRequestHandler just serves BufferedWebResponse
instances, it doesn't know which page has generated for the buffered
response.
We already had another case, where this information would be valuable,
see my last comment on https://issues.apache.org/jira/browse/WICKET-5129
Regards
Sven
On 06/13/2014 10:18 AM, Hendy Irawan wrote:
> Hi,
>
> How to get PageClass from BufferedResponseRequestHandler ?
>
> At little background: I'm sending processing metrics to Google Analytics,
> mentioning the PageClass (if available), used memory, and processing time.
> I'm using RequestCycleListener to do the crux of this.
>
> When Wicket's using IPageClassRequestHandler, things are fine.
>
> However, on the "second request" (after redirect to ?pageVersion), Wicket's
> using BufferedResponseRequestHandler, and I can't get the PageClass.
>
> A related question is how do I "link" related requests? Logically, I want
> this to happen:
>
> 1. User navigates to /contact
> 2. [http-thread-1] Begin RequestGroup -> sets starting mem usage, page
> class, etc.
> 3. [http-thread-1] page processing
> 4. Wicket redirects to /contact?0
> 5. [http-thread-2] page rendered
> 6. [http-thread-2] End RequestGroup -> calculates mem usage, etc. between
> #2..#6
>
> I tried to use ThreadLocal but since thread is different, the information
> stored in step #2 is lost.
>
> Thank you.
>
>
> --
> View this message in context: http://apache-wicket.1842946.n4.nabble.com/How-to-get-PageClass-from-BufferedResponseRequestHandler-And-how-to-link-related-requests-tp4666247.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
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