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61 lines
1.3 KiB
Markdown
61 lines
1.3 KiB
Markdown
---
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date: 20201117
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id: 269a4976-5800-4914-b49e-4bf16dd64797
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title: "@required"
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---
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# Description
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When autowiring is enabled for a service, you can also configure the
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container to call methods on your class when it’s instantiated. For
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example, suppose you want to inject the `logger` service, and decide to
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use setter-injection:
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``` php
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// src/Util/Rot13Transformer.php
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namespace App\Util;
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class Rot13Transformer
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{
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private $logger;
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/**
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* @required
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*/
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public function setLogger(LoggerInterface $logger)
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{
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$this->logger = $logger;
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}
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public function transform($value)
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{
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$this->logger->info('Transforming '.$value);
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// ...
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}
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}
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```
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Autowiring will automatically call any method with the @required
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annotation above it, autowiring each argument. If you need to manually
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wire some of the arguments to a method, you can always explicitly
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configure the method call.
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Despite property injection has some drawbacks, autowiring with @required
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annotation can also be applied to public typed properties:
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``` php
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namespace App\Util;
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class Rot13Transformer
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{
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/** @required */
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public LoggerInterface $logger;
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public function transform($value)
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{
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$this->logger->info('Transforming '.$value);
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// ...
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}
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}
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```
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