Symfony 3.4 Logger 服务

2 回答

• 10

  $this->container->get('logger') 失败，因为logger现在（截至3.2）标记为私有服务，默认情况下所有服务都是私有的，这意味着这些服务不能从容器返回，而必须依赖注入（类构造函数必须采用logger作为参数并成为可访问类的属性，或在服务配置中标记为public，并且由于logger是symfony组件，服务配置在symfony项目中，您必须复制 Logger 从symfony配置到项目服务配置并添加 public: true ，以从容器访问 Logger 实例 .

  回复于 2024-04-26T16:24:41+08:00
• 2

  如Symfony 3.4中所述， MonologBundle 和所有其他服务提供的 logger 服务默认设置为私有 . [sic]

  要解决此问题，建议的方法是使用依赖注入 . http://symfony.com/doc/3.4/logging.html

  namespace AppBundle/Controller;
  
  use Psr\Log\LoggerInterface;
  use Symfony\Bundle\FrameworkBundle\Controller\Controller;
  
  class DefaultController extends Controller
  {
       public function indexAction(LoggerInterface $logger)
       {
          $logger->info('Your Message');
       }
  }
  

  源代码参考：https://github.com/symfony/monolog-bundle/blob/v3.1.0/Resources/config/monolog.xml#L17

  对于服务定义，启用 autowire 时可以使用依赖注入 . [sic]

  #app/config/services.yml
  
  services:
      # default configuration for services in *this* file
      _defaults:
          # automatically injects dependencies in your services
          autowire: true
          # automatically registers your services as commands, event subscribers, etc.
          autoconfigure: true
          # this means you cannot fetch services directly from the container via $container->get()
          # if you need to do this, you can override this setting on individual services
          public: false
  
      # makes classes in src/AppBundle available to be used as services
      # this creates a service per class whose id is the fully-qualified class name
      AppBundle\:
          resource: '../../src/AppBundle/*'
          # you can exclude directories or files
          # but if a service is unused, it's removed anyway
          exclude: '../../src/AppBundle/{Entity,Repository,Tests}'
  
      #enables dependency injection in controller actions
      AppBundle\Controller\:
          resource: '../../src/AppBundle/Controller'
          public: true
          tags: ['controller.service_arguments']
  
     #all of your custom services should be below this line
     #which will override the above configurations
  
      #optionally declare an individual service as public
      #AppBundle\Service\MyService: 
      #    public: true
  
      #alternatively declare the namespace explicitly as public
      #AppBundle\Service\:
      #    resource: '../../src/AppBundle/Service/*'
      #    public: true
  

  然后，要将Dependency注入服务，请将参数的类型提示添加到构造函数中 .

  namespace AppBundle\Service;
  
  use Psr\Log\LoggerInterface;
  
  class MyService
  {
  
      private $logger;
  
      public function __construct(LoggerInterface $logger)
      {
           $this->logger = $logger;
      }
  
  }
  

  如果禁用 autowire ，则可以手动定义服务以注入 Logger 别名 .

  #app/config/services.yml
  
  services:
  
      AppBundle\Service\MyService:
          arguments: ['@logger']
          public: true
  

  ---

  或者，要强制从容器中公开访问 Logger 别名，您可以在应用程序服务配置中重新声明服务别名 .

  #app/config/services.yml
  
  services:
  
      #...
  
      logger:
          alias: 'monolog.logger'
          public: true
  

  ---

  您也可以在编译器传递中将logger设置为公共服务，而不是覆盖配置中的值 . https://symfony.com/doc/3.4/service_container/compiler_passes.html

  Symfony Flex

  // src/Kernel.php
  namespace App;
  
  use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
  use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
  use Symfony\Component\DependencyInjection\ContainerBuilder;
  use Symfony\Component\HttpKernel\Kernel as BaseKernel;
  
  class Kernel extends BaseKernel implements CompilerPassInterface
  {
      use MicroKernelTrait;
  
       public function process(ContainerBuilder $container)
       {
          // in this method you can manipulate the service container:
          // for example, changing some container service:
          $container->getDefinition('logger')->setPublic(true);
      }
  
  }
  

  Symfony Bundle

  // src/AppBundle/AppBundle.php
  namespace AppBundle;
  
  use Symfony\Component\HttpKernel\Bundle\Bundle;
  use Symfony\Component\DependencyInjection\ContainerBuilder;
  use AppBundle\DependencyInjection\Compiler\CustomPass;
  
  class AppBundle extends Bundle
  {
      public function build(ContainerBuilder $container)
      {
          parent::build($container);
  
          $container->addCompilerPass(new CustomPass());
      }
  }
  

  // src/AppBundle/DependencyInjection/Compiler/CustomPass.php
  namespace AppBundle\DependencyInjection\Compiler;
  
  use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
  use Symfony\Component\DependencyInjection\ContainerBuilder;
  
  class CustomPass implements CompilerPassInterface
  {
      public function process(ContainerBuilder $container)
      {
          $container->getDefinition('logger')->setPublic(true);
      }
  }
  

  回复于 2024-04-26T16:24:41+08:00