/**
* @param SystemEvent $evt
* @throws Exception
*
* @return int The number of equal-hashed events
*/
public function store(SystemEvent $evt)
{
if (empty($evt->hash)) {
throw new Exception("Hash is not expected to be empty!");
}
// work on a defensive copy, so we won't influence the given arg
$evt2Store = clone $evt;
if ($evt2Store->origin instanceof RequestExceptionEvent) {
// wrap exception to prevent endless-recursion caused by args in stacktraces
$evt2Store->origin->exception = SerializableException::fromException($evt2Store->origin->exception);
}
$events = $this->findByHash($evt2Store->hash);
// make sure we only hold at most X event-occurences, but keep the oldest
$maxOccurences = 5;
if (count($events) > $maxOccurences) {
$oldest = $events[0];
$events = array_slice($events, -($maxOccurences - 1));
$events[0] = $oldest;
}
$events[] = $evt2Store;
// events which don't happen at least once per X hours, will be dropped
$this->dataStore->set(self::CACHE_NAMESPACE . $evt2Store->hash, $events, strtotime("+2 hours"));
if ($this->dataStatistics->supported()) {
// we remember how often an error occured a bit longer than the actual even-data
// because this info might help us later on to decide which events are more important than others.
return $this->dataStatistics->increment(self::CACHE_NAMESPACE . $evt2Store->hash, 1, strtotime("+3 hours"));
}
// when APC is not supported, return approx. value
return count($events);
}
