yii\log\Target::collect PHP Method

    public function collect($messages, $final)
    {
        $this->messages = array_merge($this->messages, static::filterMessages($messages, $this->getLevels(), $this->categories, $this->except));
        $count = count($this->messages);
        if ($count > 0 && ($final || $this->exportInterval > 0 && $count >= $this->exportInterval)) {
            if (($context = $this->getContextMessage()) !== '') {
                $this->messages[] = [$context, Logger::LEVEL_INFO, 'application', YII_BEGIN_TIME];
            }
            // set exportInterval to 0 to avoid triggering export again while exporting
            $oldExportInterval = $this->exportInterval;
            $this->exportInterval = 0;
            $this->export();
            $this->exportInterval = $oldExportInterval;
            $this->messages = [];
        }
    }

 /**
  * {@inheritdoc}
  */
 public function collect($messages, $final)
 {
     if (!isset($this->client)) {
         $this->client = new \Raven_Client($this->dsn, $this->clientOptions);
     }
     parent::collect($messages, $final);
 }