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Console/Command/ClearCache/MetadataCommand.php (1 issue)

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<?php
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declare(strict_types=1);
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namespace Doctrine\ODM\MongoDB\Tools\Console\Command\ClearCache;
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use Doctrine\Common\Cache\ApcCache;
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use Symfony\Component\Console\Command\Command;
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use Symfony\Component\Console\Input\InputInterface;
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use Symfony\Component\Console\Output\OutputInterface;
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use const PHP_EOL;
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/**
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 * Command to clear the metadata cache of the various cache drivers.
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 *
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 */
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class MetadataCommand extends Command
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{
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    /**
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     * @see \Symfony\Component\Console\Command\Command
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     */
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    protected function configure()
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    {
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        $this
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        ->setName('odm:clear-cache:metadata')
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        ->setDescription('Clear all metadata cache of the various cache drivers.')
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        ->setDefinition([])
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        ->setHelp(<<<EOT
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Clear all metadata cache of the various cache drivers.
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EOT
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        );
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    }
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    /**
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     * @see \Symfony\Component\Console\Command\Command
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     */
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    protected function execute(InputInterface $input, OutputInterface $output)
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    {
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        $dm = $this->getHelper('documentManager')->getDocumentManager();
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It seems like you code against a concrete implementation and not the interface Symfony\Component\Console\Helper\HelperInterface as the method getDocumentManager() does only exist in the following implementations of said interface: Doctrine\ODM\MongoDB\Too...r\DocumentManagerHelper.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.

Available Fixes

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
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        $cacheDriver = $dm->getConfiguration()->getMetadataCacheImpl();
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        if (! $cacheDriver) {
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            throw new \InvalidArgumentException('No Metadata cache driver is configured on given DocumentManager.');
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        }
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        if ($cacheDriver instanceof ApcCache) {
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            throw new \LogicException('Cannot clear APC Cache from Console, its shared in the Webserver memory and not accessible from the CLI.');
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        }
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        $output->write('Clearing ALL Metadata cache entries' . PHP_EOL);
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        $success = $cacheDriver->deleteAll();
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        if ($success) {
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            $output->write('The cache entries were successfully deleted.' . PHP_EOL);
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        } else {
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            $output->write('No entries to be deleted.' . PHP_EOL);
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        }
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    }
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}
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