How to insert response size and time into the page itself, at least partially?

user_102381 0
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I realize it's a chicken and egg problem and that it's not possible to accurately resolve the time it took to render a page (or the size of response) and insert that number into the page itself without affecting either measure. Nevertheless, I'm looking for a way to insert either number partially in a page of a JSF/Facelets/Seam application.

E.g., at the bottom of a .jsf page somewhere:

<!-- page size: 10.3Kb -->
<!-- render time: 0.2s -->

I've come across JSFUnit's JSFTimer, which is really handy. However, the phase listener approach doesn't allow the results of RENDER_RESPONSE phase to be inserted into the page. Not sure how to access the size of the response encoded so far either.

Is there a quick and dirty way to hook up to some sort of post-processing event at or after the end of RENDER_RESPONSE and to inject both numbers into the page about to be rendered? One way of approaching this is perhaps through servlet filters, but I'm looking for something simpler; perhaps a trick with Seam or Facelets...

Thanks,
-A

jsf httpresponse servlets
3 Answers

I wrote a blog post explaining how you could create an Interceptor that would measure each method call your seam compontents where using.

You can find the blog post here. You need to scroll down to the second part.

Basically, all you need to do is annotate the method you want to measure with @MeasureCalls and it will automatically be picked up by the interceptor

@Name("fooBean")
@MeasureCalls
public class FooBean

An output would be something like this, showing the time it took in milliseconds and how many times each method was called:

284.94 ms   1   FooBean.getRandomDroplets()
284.56 ms   1   GahBean.getRandomDroplets()
201.60 ms   2   SohBean.searchRatedDoodlesWithinHead()
185.94 ms   1   FroBean.doSearchPopular()
157.63 ms   1   FroBean.doSearchRecent()
 42.34 ms   1   FooBean.fetchMostRecentYodel()
 41.94 ms   1   GahBean.getMostRecentYodel()
 15.89 ms   1   FooBean.getNoOfYodels()
 15.00 ms   1   GahBean.getNoOfYodels()
  9.14 ms   1   SohBean.mainYodels()
  1.11 ms   2   SohBean.trackHoorayEvent()
  0.32 ms   1   FroBean.reset()
  0.22 ms  43   NohBean.thumbPicture()
  0.03 ms  18   FooBean.getMostRecentYodels()
  0.01 ms   1   NohBean.profilePicture()
  0.01 ms   1   FroBean.setToDefault()
  0.01 ms   1   FroBean.getRecentMarker()
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