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我想将一组实现公共接口的对象注入到我的一个服务中。我使用 zend servicemanager 作为 DI 容器。我现在已经阅读了很多文档，在我看来 AbstractPluginManager 是要走的路。我无法让它工作。有没有使用 AbstractPluginManager + Zend Expressive 3 的示例，我可以看看？

我的最终目标是将所有实现公共接口的注册类动态注入到我的服务中。

例子：

interface I{}
class A implements I{}
class B implements I{}
class C{}

我的服务

__construct(array Iimplementations){...}

$service = $container->get('myservice')

$service has Iimplementations

提前致谢

4

2 回答 2

2

AbstractPluginManager 主要用于验证和过滤插件。您可以创建类，并且在验证时，您可以传递使过滤器或验证器可重用的特定配置。

您正在寻找的可能是一个抽象工厂。您注册工厂一次，它可以为您创建服务。在您的情况下，具有一组特定的依赖项。

interface I{}
class A implements I{}
class B implements I{}

class MyAbstractFactory implements AbstractFactoryInterface
{
    public function canCreate(ContainerInterface $container, $requestedName)
    {
        return in_array('I', class_implements($requestedName), true);
    }

    public function __invoke(ContainerInterface $container, $requestedName, array $options = null)
    {
        return new $requestedName(
            $container->get(DependencyFoo::class),
            $container->get(DependencyBar::class)
        );
    }
}

// config/autoload/dependencies.global.php
return [
    'dependencies' => [
        'factories' => [
            // ...
        ],

        'abstract_factories' => [
            MyAbstractFactory::class,
        ],
    ],
];

如果每个类的依赖关系不同，您也可以发疯并使用反射来检测依赖关系，但这会增加很多开销。我认为创建单独的工厂更容易且更易于维护。然后是zend-expressive-tooling，它是一个 cli 工具，可以创建工厂、处理程序和中间件。

于 2018-04-13T08:55:40.957 回答
0 
/*Getting I concrete implementations via the plugin manager will ensure the implementation of the I interface*/   
class IPluginManager extends AbstractPluginManager
{
   protected $instanceOf = I::class;

   public function getIConcreteImplementations()
   {
       $concreteImpl = [];
       foreach(array_keys($this->factories) as $key)
       {
           $concreteImpl[] = $this->get($key);
       }

       return $concreteImpl;
    }
}
/*IPluginManagerFactory*/
class TransactionSourcePluginManagerFactory
{
  const CONFIG_KEY = 'i-implementations-config-key';

public function __invoke(ContainerInterface $container, $name, array $options = null)
{
    $pluginManager = new IPluginManager($container, $options ?: []);

    // If this is in a zend-mvc application, the ServiceListener will inject
    // merged configuration during bootstrap.
    if ($container->has('ServiceListener')) {
        return $pluginManager;
    }

    // If we do not have a config service, nothing more to do
    if (! $container->has('config')) {
        return $pluginManager;
    }

    $config = $container->get('config');

    // If we do not have validators configuration, nothing more to do
    if (! isset($config[self::CONFIG_KEY]) || ! 
      is_array($config[self::CONFIG_KEY])) {
        return $pluginManager;
    }

    // Wire service configuration for validators
    (new Config($config[self::CONFIG_KEY]))->configureServiceManager($pluginManager);

    return $pluginManager;
  }
}
/*In the ConfigProvider of the module or global config*/
class ConfigProvider
{
/**
 * Returns the configuration array
 *
 * To add a bit of a structure, each section is defined in a separate
 * method which returns an array with its configuration.
 *
 */
   public function __invoke() : array
   {
    return [
        'dependencies' => $this->getDependencies(),
        'routes' => $this->getRoutes(),
        'i-implementations-config-key' => $this->getIConcreteImplementations(),
    ];
   }
   public function getIConcreteImplementations() : array
   {
    return [
        'factories' => [
            A::class => AFactory::class,
            B::class => InvokableFactory::class,
        ],
    ];
   }
}
/*I can now be sure that I am injecting an array of I implementations into my Service*/
class ServiceFactory
{
    public function __invoke(ContainerInterface $container) : Service
    {
        $pluginManager = $container->get(IPluginManager::class);

        $impl = $pluginManager->getIConcreteImplementations();

        return new Service($impl);
    }
 }
于 2018-04-16T16:22:47.597 回答