Internal fetch cache/reuse per request?

Sunday 03 February 2008 3:51:56 am

Are API fetches (especially all the ones wrapped around persistent layer) cached and reused somehow within a single request? When carrying out some PHP tasks that require fetching data, I always wonder if I should implement my own caching mechanisms.

<b>Example:</b> Let's say, we have an array of 100 objects with user ID references (7 different users). I want to fetch user object for each of the 100 objects. I could simply walk the array and fetch user object each time, which would make 100 times, but in fact, only 7 user fetches are actually necessary. Now, does eZ take care of such recurring fetches? Should I implement my own cache (which is quite easy) or would that be unnecessary work?

<b>Code example:</b>

$userObjectArray = array();
foreach( $objectList as $object )
{
  $userID = $object->ID;
  if( !isset( $userObjectArray[$userID] ) )
  {
    $userObjectArray[$userID] = eZContentObject::fetch( $userID );
  }
  ...
}

--
Company: mediaSELF Sp. z o.o., http://www.mediaself.pl
eZ references: http://ez.no/partners/worldwide_partners/mediaself
eZ certified developer: http://ez.no/certification/verify/272585
eZ blog: http://ez.ryba.eu

Sunday 03 February 2008 4:45:06 am

Thanks a lot, André!
Now I know where to look and in which cases. Naturally, number of SQL queries can be of much help.
Greets,
Piotrek

--
Company: mediaSELF Sp. z o.o., http://www.mediaself.pl
eZ references: http://ez.no/partners/worldwide_partners/mediaself
eZ certified developer: http://ez.no/certification/verify/272585
eZ blog: http://ez.ryba.eu