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53 lines
2.2 KiB
53 lines
2.2 KiB
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Contracts\Service;
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/**
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* A ServiceSubscriber exposes its dependencies via the static {@link getSubscribedServices} method.
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*
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* The getSubscribedServices method returns an array of service types required by such instances,
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* optionally keyed by the service names used internally. Service types that start with an interrogation
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* mark "?" are optional, while the other ones are mandatory service dependencies.
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*
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* The injected service locators SHOULD NOT allow access to any other services not specified by the method.
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*
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* It is expected that ServiceSubscriber instances consume PSR-11-based service locators internally.
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* This interface does not dictate any injection method for these service locators, although constructor
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* injection is recommended.
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*
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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interface ServiceSubscriberInterface
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{
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/**
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* Returns an array of service types required by such instances, optionally keyed by the service names used internally.
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*
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* For mandatory dependencies:
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*
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* * ['logger' => 'Psr\Log\LoggerInterface'] means the objects use the "logger" name
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* internally to fetch a service which must implement Psr\Log\LoggerInterface.
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* * ['loggers' => 'Psr\Log\LoggerInterface[]'] means the objects use the "loggers" name
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* internally to fetch an iterable of Psr\Log\LoggerInterface instances.
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* * ['Psr\Log\LoggerInterface'] is a shortcut for
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* * ['Psr\Log\LoggerInterface' => 'Psr\Log\LoggerInterface']
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*
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* otherwise:
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*
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* * ['logger' => '?Psr\Log\LoggerInterface'] denotes an optional dependency
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* * ['loggers' => '?Psr\Log\LoggerInterface[]'] denotes an optional iterable dependency
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* * ['?Psr\Log\LoggerInterface'] is a shortcut for
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* * ['Psr\Log\LoggerInterface' => '?Psr\Log\LoggerInterface']
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*
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* @return array The required service types, optionally keyed by service names
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*/
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public static function getSubscribedServices();
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}
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