vendor = $vendor; $this->purchase_order = $purchase_order; } public function run() { if ($this->purchase_order->number != '') { return $this->purchase_order; } $this->trySaving(); return $this->purchase_order; } private function trySaving() { $x=1; do{ try{ $this->purchase_order->number = $this->getNextPurchaseOrderNumber($this->purchase_order); $this->purchase_order->saveQuietly(); $this->completed = false; } catch(QueryException $e){ $x++; if($x>10) $this->completed = false; } } while($this->completed); } }