[TYPO3-ttnews] better cache management for tt_news

[Ernesto Baschny [cron IT]]

Hi Krystian,

that sounds pretty cool, I will check it out!

Will you be at the T3-Developer Days on this week? If yes, maybe we 
could discuss those things, because I also have some ideas to get 
features which would make stuff like this possible in the core (without 
having to embed tags in cached content and search with "like" in 
cache_pages!).

There is also the USER / USER_INT talk on sunday with Stucki, I am sure 
these kind of stuff will also pop up in the discussions. Would be cool 
if you could come.

Cheers,
Ernesto

Krystian Szymukowicz wrote: on 06.05.2008 16:31:
> 
> Hi
> 
> I hope someone will be interested.
> 
> A month ago on 'dev' I wrote a post about idea of better cache 
> management for extensions:
> http://support.typo3.org/index.php?id=17&tx_nntpreader_pi1[nid]=2&tx_nntpreader_pi1[mid]=333485&cHash=0174821ab9 
> 
> 
> Today I've just uploaded two extensions - ttnewscache and 
> ttnewscache_clearlike.
> 
> First extension (ttnewscache) builds an array with information which 
> part of tt_news cached views has become not up to date after latest 
> tt_news record update/create/delete operation.
> Then the array is used by other extension (ttnewscache_clearlike) to 
> clear proper cache records.
> 
> Hook mechanism allows to use the array information by many extensions. 
> So one extension can delete cache_pages, other can remove statically 
> generated files if extensions like for example nc_staticfilecache are used.
> 
> So how cache is cleared after installing ttnewscache with proper 
> clearing ext.?
> 
> In short:
> 
> 1. No more clearing cache for ALL single.
> 
> 2. No more clearing cache for views that can not hold the news. 
> Extension checks if views match the news categories. If not then cache 
> are not cleared.
> 
> 3. Extension checks for changes that have NO impact on cache. For 
> example: the hidden news was created, the hidden news was updated, the 
> hidden news was deleted.
> 
> 4. Extension checks what field have been modified. There are fields 
> which clear all cached pages of view but there are also fields that 
> clear only selected pages (see manual for better explanation). Each type 
> of view (LIST,LATEST) can have its own "clearing" fields and each view 
> can override this settings. Check TypoScript Examples in documentation.
> 
> 
> More information in manuals.
> 
> 
> -- 
> grtz
> Krystian
> 
>