Le mardi 1 août 2017 05:49:22 UTC+2, Larry Garfield a écrit :
>
> On 07/30/2017 09:34 AM, Georges L. wrote:
>
> Hello folks,
>
> today during a new test implementation (I am the Lead behind PhpFastCache) 
> I got a major question on a concept of the Psr6:
>
> 1) If you set a cache item with a TTL of 1sec, then your script duration 
> take more than 2secondes: What's the expected behavior of isHit() ? 
> Supposing that I'm using the *same instance* of my cacheItem during the 
> whole script execution (not by calling getItem() again).
>
>
> Ok ! 

 

> The cache lifetime applies as of the moment that the request is run, and 
> isHit() is guaranteed.  That is, if at the millisecond that getItem() or 
> isHit() runs (technically it could be either, I suppose, depending on the 
> implementation) the cache item is valid, then that CacheItem object remains 
> valid until it goes out of scope.
>
> 2) In the same spirit: What's the expected behavior of passing a "past" 
> value to expireAt/ExpirerAfter ? This is not mentioned at all in the Psr6 
> specs (Only if null is passed)
>
>
> Setting an expire time that's in the past is functionally equivalent to 
> not setting it.  Whether the implementation even bothers to try writing it 
> is, I suppose, up to it, but since a lookup for it will always return a 
> cache miss it doesn't much matter.
>
> If I understand well, passing an expired time is the same thing than 
deleting the CacheItem (by forcing it to expire) ?
 

> 3) Should getItem() stores instances inside a private property, or should 
> it MIUST get it from the cache storage directly ? This is not mentioned 
> either.
>
>
> I'm not sure I follow here.  Can you clarify?
>

As you can see here:
https://github.com/PHPSocialNetwork/phpfastcache/blob/final/src/phpFastCache/CacheManager.php#L183

I store the cache items objects to re-serve them statically later if needed 
(until the script end or detachAllItems() is called).

 

>
> --Larry Garfield
>

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