[TYPO3-core] RFC #15937: Bug: [Caching framework] Improve error message if no frontend was defined for core caches

[Christian Kuhn]

Hey,

On 10/11/2010 12:05 PM, Ernesto Baschny [cron IT] wrote:
> The t3lib_cache_Manager has the definitive list of all caches and all
> its setting, because every cache has to go through "factory::create()".
> So why shouldn't the garbage collector be able to go through all of
> them? It shouldn't rely on some external configuration, but it should be
> a method / functionality of the cache_manager itself.
>
> If you think it shouldn't, then the cache manager should implement some
> method to return an array of all caches so the GC can iterate over them.

Problem with the manager is: It knows the caches only if they where 
actually instantiated. Extbase for instance defines its cache in 
ext_localconf in typo3_conf_vars, but creates its cache object somewhere 
in its dispatcher, and the dispatcher is only called if some extbase 
functionality is called.
Thats the reason why I choosed typo3_conf_vars to find all cache 
definition for the garbage collection task: It won't find all additional 
caches if we implement some "give me all defined caches" method in the 
cache manager because the for instance the extbase cache isn't 
necessarily instantiated at this point.

Regards
Christian