/**
* Reads an array of cache objects from storage.
*
* @param mixed array of Ids of the cache entry to read
* @return array of array includes key, data, expires
*/
protected function readCacheArray($keys, $writeLock = false)
{
if (empty($keys)) {
return array();
}
if (count($keys) == 1) {
//faster to just call the method for single key. Saves overhead
$key = array_pop($keys);
return array($key => $this->readCache($key));
}
//There's some bookkeeping here. We need to map keys from the app with
//prefixed keys to get data, and then map back.
$memKeys = array();
foreach ($keys as $key) {
$memKeys[] = $this->prefix . $key;
}
$cached = $this->memcached->get($memKeys);
//if we didn't get anything, we're done.
if (empty($cached)) {
return array();
}
//now map the result back to the original keys
$found = array();
foreach ($cached as $cacheRecord) {
$found[$cacheRecord['key']] = $cacheRecord;
}
$allEvents = array();
foreach ($found as $key => $record) {
try {
if (isset($record['data'])) {
//we need to check events. Let's get all the events so we can
//make one call.
if (!empty($record['events'])) {
foreach ((array) $record['events'] as $event) {
// We have to store the retrieved record's events in memory so that calling event() will work correctly even if
// we read from cache but did not write to cache within the same session. VBV-12944
if (!isset($this->events[$event])) {
$this->events[$event] = array();
}
$this->events[$event][$key] = $key;
// this key is the original, non-prefixed key. See "now map the result back to the original keys" above.
$allEvents[] = $event;
}
}
} else {
unset($found[$key]);
}
} catch (exception $e) {
//If we got here, something was improperly serialized
unset($found[$key]);
}
}
//Possible we've eliminated everything, or there are no events. If so we're done.
if (empty($found) or empty($allEvents)) {
return $found;
}
$eventTimes = $this->getEventTimes($allEvents);
foreach ($found as $key => $record) {
//now check the events.
if (!empty($record['events']) and is_array($record['events'])) {
foreach ($record['events'] as $event) {
if (!isset($eventTimes[$event]) or $eventTimes[$event] >= $record['created']) {
unset($found[$key]);
$this->purgeCache($key);
continue;
}
}
}
}
return $found;
}
