On Tuesday, 1 August 2017 20:01:15 UTC+1, Georges L. wrote:
>
>
>
> 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).
>

Are you asking if the interface can be used as just a single-request cache, 
with items only lasting as long as the current page request? It would 
certainly be nice at times to be able to switch a cache library to this 
mode for development.

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