Symfony 3.4记录器服务

Question

当我调用logger服务在日志文件中获取此信息消息时，它工作正常，但将此消息写入日志文件：

php.INFO:User Deprecated:The“logger”服务是私有的，从容器中获取它是不推荐的，因为Symfony 3.2，并且将在4.0中失败。您应该公开服务，或者停止直接使用容器，改用依赖项注入。{“异常”：“[object]（ErrorException（代码：0）：用户已弃用：记录器\”\“服务是私有的，自Symfony 3.2以来，从容器中获取服务已被弃用，并将在4.0中失败。您应该将服务公开，或者停止直接使用容器，改用依赖注入。at/home/***/####/PROJECT/vendor/Symfony/Symfony/src/Symfony/Component/dependenceinjection/container.php:275）”[]

My symfony版本：3.4.1

Answer 1

$this-

Answer 2

如Symfony 3.4所述，默认情况下，monogbundle提供的logger服务和所有其他服务都设置为private。[原文如此]

要解决此问题，建议使用依赖项注入。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，当启用autowire时，依赖注入可用。

#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，若要将依赖项注入到服务中，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;
    }
   
}

如果禁用了autowire，则可以手动定义服务以注入记录器别名。

#app/config/services.yml

services:

    AppBundle\Service\MyService:
        arguments: ['@logger']
        public: true

或者，要强制从容器公开访问记录器别名，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记录器设置为公共服务，而不是重写配置中的值。https://symfony.com/doc/4.4/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束

// 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);
    }
}