Clearing a specific cache-block ?

Friday 26 May 2006 2:13:26 pm

Hi there,

Is there a way to clear a specific cache-block, knowing specified keys programmatically ?

Here's my problem.

I fetch content sorted by priority.

{cache-block keys=$some_stuff_here}
{def $my_objects=fetch( content , list , ... ) )}

{foreach $my_objects as $one_object}
{node_view_gui content_node=$one_object view=my_very_special_view}
{/foreach}
{/cache-block}

But when the administrator changes priority, the cache-block isnt removed (which is normal). How could this be achieved... without removing the main cache-block ?
Also, I didn't found any function in cachemanager that cleared a specific cache-block.

Thanks for reading me.

My blog : http://www.starnab.com/ezpublish / http://www.starnab.com/ / http://www.assiki-consulting.com
eZ Publish Freelance developper. Feel free to contact me +33 674 367 057
nabil at assiki d0t fr

Wednesday 07 June 2006 2:03:08 am

Hum... Hi there ?

My blog : http://www.starnab.com/ezpublish / http://www.starnab.com/ / http://www.assiki-consulting.com
eZ Publish Freelance developper. Feel free to contact me +33 674 367 057
nabil at assiki d0t fr

Wednesday 06 September 2006 7:53:00 am

I will also like to now if it is possible to remove a specific cache-block, with a template function. My problem is that if I smart cache a list of elements, is not possible to change the offset variable after. Therefore I need to remove the cache for this specific page, but not for the whole site.

Looking forward to hear if anyone has a solution to this problem!

---------------------------------------------------------------------

Thomas Stage Larsen
System Developer

e : tsl@ez.no | m: +45 26 12 47 61 | eZ systems A/S | w: www.ez.no

Friday 08 September 2006 4:32:41 am

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Thomas Stage Larsen
System Developer

e : tsl@ez.no | m: +45 26 12 47 61 | eZ systems A/S | w: www.ez.no

Monday 11 September 2006 6:14:03 am

Is not the pagelayout template I am working on in this case, so I can not use the $current_user.contentobject_id variable. Its also therefore I am using $node.path_string. Is there any other parameter I can use instead of $current_user?

---------------------------------------------------------------------

Thomas Stage Larsen
System Developer

e : tsl@ez.no | m: +45 26 12 47 61 | eZ systems A/S | w: www.ez.no

Tuesday 12 September 2006 9:27:09 am

Did you get it working?

You did not tell me which template you were actually editing ;-)

Kristian

http://ez.no/ez_publish/documenta...tricks/show_which_templates_are_used
http://ez.no/doc/ez_publish/techn...te_operators/miscellaneous/attribute

Monday 28 February 2011 1:19:50 pm

I found a function that is useful to clean cache when you know the keys :

eZContentCache::cleanup()

Seems to be an old stuff but has the Cluster support.

UPDATE

This function will work only if you know the path or correct keys of your cache.

With some tests, I've found what keys are expected by this function :

1. The key string : it's the crc32 of a serilazed version of your array of keys.
2. Subtree expiry : can be null
3. ttl : can be null.

As the generated key string was different from what I was computing in #1, I've looked under the eztemplatefunction.php and more precisely under the templateNodeTransformation function.

It appears that the keys array is composed of :

1. Array of keys
2. Placement : it's a string defined by the start (line / column) and the end (start / column) of the cache block inside the calling template. It looks like 83_42_122_37_extension/.../design/standard/templates/name_of_the_template.tpl.
3. Siteaccess.

Then this is processed to match the crc32(serialize keys array) :

<code>var/ezflow_site/cache/template-block/3/8/0/380123145654.cache</code>

You may notice that the folders (3/8/0) are the extract of the beginning of the filename.

So, the only way to find the cache generated is to know where it is (if not linked to a node_id).

I will follow the track to find the placement that is hardcoded inside the PHP cache, maybe with a small regexp we can reach the placement.

Maxime Thomas
maxime.thomas@wascou.org | www.wascou.org | http://twitter.com/wascou

Company Blog : http://www.wascou.org/eng/Company/Blog
Technical Blog : http://share.ez.no/blogs/maxime-thomas

Tuesday 01 March 2011 11:00:05 pm

Hi Gaetano,

Actually, it does not match what I want to do. I have the keys (user_id and other things) and I know the template. I just want to clear the cache for this combination.

The use context is a classic Ajax script that will do some back office actions in front and when the user refreshes the page, cache has to be refreshed.

If you have a good solution for this one, I'm taking it :-D

Max

Maxime Thomas
maxime.thomas@wascou.org | www.wascou.org | http://twitter.com/wascou

Company Blog : http://www.wascou.org/eng/Company/Blog
Technical Blog : http://share.ez.no/blogs/maxime-thomas