[TYPO3-project-4-3] changing the page cache to use the new caching framework

[Martin Kutschker]

Ingo Renner schrieb:
> Hi all,
> 
> now that t3lib_cache is in trunk I had the idea to change the existing
> page cache to use the new framework.
> 
> biggest con though:
> * it would break backwards compatibility
> 
> pros:
> * way more flexible
> * easier to use
> * (maybe / depending on the chosen cache backend) faster
> * we would have tags on the cache entries
> 
> especially the thing with the tags got me some nice ideas:
> 
> After moving to the new system it would dramatically easier for people
> to "tag" pages in their extensions. with whatever tags they want and
> clear those cache entries whenever their extension needs to. This would
> make the system way more flexible and more dynamic
> 
> Example:
> a page showing a list of tt_news records in a list view. tt_news could
> go and add tags in a way like this:
> 
>     // tt_news_X are the records shown on that page
> $TSFE->page->addTags('tt_news_list, tt_news_1, tt_news_2, tt_news_3');
> 
> Then there could be another plugin X on the same page that also tags the
> page:
> 
> $TSFE->page->addTags('tx_X_someTag, tx_X_someOtherTag');
> 
> And of course the core would tag the page with stuff we already have
> like the cHash:
> 
> $TSFE->page->addTags('core_cHash_######');
> 
> Looking up and clearing pages by tag is then quite easy using
> t3lib_cache...
> 
> 
> Any comments?

Interesting.

May an extension/plugin also modify the cache expiry time? Let's say the
page starts with the default of 24 but the news plugin for a some site
thinks 2 hours is enough then it could change the value on-the-fly (only
reduce, never extend).

Masi