php - 使用 Symfony2 更详细地记录错误

Question

我的生产日志记录使用了以下配置:

monolog:
    handlers:
        mail:
            type:         fingers_crossed
            action_level: error
            handler:      grouped
        grouped:
            type:    group
            members: [streamed, buffered]
        streamed:
            type:  stream
            path:  %kernel.logs_dir%/%kernel.environment%.log
            level: debug
        # buffered is used to accumulate errors and send them as batch to the email address
        buffered: 
            type:    buffer
            handler: swift
        swift:
            type:       swift_mailer
            from_email: info@....com
            to_email:   info@....com
            subject:    Error Occurred!
            level:      debug

这会发送这样的电子邮件:

[2012-03-21 21:24:09] security.DEBUG: Read SecurityContext from the session [] []

[2012-03-21 21:24:09] security.DEBUG: Reloading user from user provider. [] []

[2012-03-21 21:24:09] security.DEBUG: Username "jakob.asdf" was reloaded from user provider. [] [] [2012-03-21 21:24:09] request.INFO: Matched route "_user_settings" (parameters: "_controller": "...Bundle\Controller\UserController::settingsAction", "username": "Jakob.asdf", "_route": "_user_settings") [] []

[2012-03-21 21:24:09] request.ERROR: Symfony\Component\HttpKernel\Exception\NotFoundHttpException: ...Bundle\Entity\User object not found. (uncaught exception) at /var/www/.../vendor/bundles/Sensio/Bundle/FrameworkExtraBundle/Request/ParamConverter/DoctrineParamConverter.php line 50 [] []

[2012-03-21 21:24:09] security.DEBUG: Write SecurityContext in the session [] []

我真的很想在这里有一个堆栈跟踪，或者至少是我的 Controller 中触发错误的行号。否则真的是很多人猜测可能出了什么问题。

现在，问题是:有什么方法可以实现这样更详细的日志记录？

Answer 1

是的，这是可以实现的。

创建一个 ExceptionListener 类。

//namespace declarations

class ExceptionListener{
  /**
   * @var \Symfony\Component\HttpKernel\Log\LoggerInterface
   */
  private $logger =null;

  /**
   * @param null|\Symfony\Component\HttpKernel\Log\LoggerInterface $logger
   */
  public function __construct(LoggerInterface $logger = null)
  {
    $this->logger = $logger;
  }

  /**
   * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
   */
  public function onKernelException(GetResponseForExceptionEvent $event)
  {
    if($this->logger === null)
      return;
    $exception = $event->getException();
    $flattenException = FlattenException::create($exception);
    $this->logger->err('Stack trace');
    foreach ($flattenException->getTrace() as $trace) {
      $traceMessage = sprintf('  at %s line %s', $trace['file'], $trace['line']);
      $this->logger->err($traceMessage);
    }  
  }
}

然后注册监听器。

 kernel.listener.your_listener_name:
  class: FQCN\Of\ExceptionListener
  tags:
      - { name: kernel.event_listener, event: kernel.exception, method: onKernelException , priority: -1}
      - { name: monolog.logger, channel: mychannel }
  arguments: 
      - "@logger"

您可以根据需要对其进行调整。