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Add controller and action name to the fragment caching instrumentation payload #14137



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@dasch dasch commented Feb 21, 2014

This allows tracking the cache activity and performance separately for each controller action. For instance, it would be possible to calculate the cache hit rate for a specific action on a specific controller.

I'd like to add the virtual path of the template to the payload, but it doesn't appear to be accessible from within the module – and I'd rather not pass it explicitly from Action View. If you have any ideas, it would be much appreciated.

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dasch commented Feb 22, 2014

@josevalim I've added some more instrumentation here – would you mind taking a look at it?

@robin850 robin850 modified the milestone: 4.2.0 Feb 22, 2014
@robin850 robin850 added this to the 4.2.0 milestone Mar 2, 2014
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dasch commented May 3, 2014

@rafaelfranca @josevalim would you guys care to take a look at this? It's been sitting here for a while now, and I think it would be useful for people :-)

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I don't see why we should not. Could you add a CHANGELOG entry?

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dasch commented May 10, 2014

@rafaelfranca sure! I've pushed an updated commit.

@@ -90,7 +90,13 @@ def expire_fragment(key, options = nil)

def instrument_fragment_cache(name, key) # :nodoc:
ActiveSupport::Notifications.instrument("#{name}.action_controller", :key => key){ yield }
payload = {
:controller => controller_name,
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Could you please use 1.9 hash syntax here ?

@rafaelfranca rafaelfranca merged commit 92fbbf6 into rails:master May 14, 2014
rafaelfranca added a commit that referenced this pull request May 14, 2014

Add controller and action name to the fragment caching instrumentation payload

@dasch dasch deleted the better-fragment-cache-instrumentation branch Oct 16, 2014
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3 participants