public function DbLog::log in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/dblog/src/Logger/DbLog.php \Drupal\dblog\Logger\DbLog::log()

Overrides RfcLoggerTrait::log

File

core/modules/dblog/src/Logger/DbLog.php, line 55

Class

DbLog

Logs events in the watchdog database table.

Namespace

Drupal\dblog\Logger

Code

public function log($level, $message, array $context = []) {

  // Remove any backtraces since they may contain an unserializable variable.
  unset($context['backtrace']);

  // Convert PSR3-style messages to \Drupal\Component\Render\FormattableMarkup
  // style, so they can be translated too in runtime.
  $message_placeholders = $this->parser
    ->parseMessagePlaceholders($message, $context);
  try {
    $this->connection
      ->insert('watchdog')
      ->fields([
      'uid' => $context['uid'],
      'type' => mb_substr($context['channel'], 0, 64),
      'message' => $message,
      'variables' => serialize($message_placeholders),
      'severity' => $level,
      'link' => $context['link'],
      'location' => $context['request_uri'],
      'referer' => $context['referer'],
      'hostname' => mb_substr($context['ip'], 0, 128),
      'timestamp' => $context['timestamp'],
    ])
      ->execute();
  } catch (\Exception $e) {

    // When running Drupal on MySQL or MariaDB you can run into several errors
    // that corrupt the database connection. Some examples for these kind of
    // errors on the database layer are "1100 - Table 'xyz' was not locked
    // with LOCK TABLES" and "1153 - Got a packet bigger than
    // 'max_allowed_packet' bytes". If such an error happens, the MySQL server
    // invalidates the connection and answers all further requests in this
    // connection with "2006 - MySQL server had gone away". In that case the
    // insert statement above results in a database exception. To ensure that
    // the causal error is written to the log we try once to open a dedicated
    // connection and write again.
    if (($e instanceof DatabaseException || $e instanceof \PDOException) && $this->connection
      ->getTarget() != self::DEDICATED_DBLOG_CONNECTION_TARGET) {

      // Open a dedicated connection for logging.
      $key = $this->connection
        ->getKey();
      $info = Database::getConnectionInfo($key);
      Database::addConnectionInfo($key, self::DEDICATED_DBLOG_CONNECTION_TARGET, $info['default']);
      $this->connection = Database::getConnection(self::DEDICATED_DBLOG_CONNECTION_TARGET, $key);

      // Now try once to log the error again.
      $this
        ->log($level, $message, $context);
    }
    else {
      throw $e;
    }
  }
}