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<?php |
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/** |
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* @copyright Copyright (C) eZ Systems AS. All rights reserved. |
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* @license For full copyright and license information view LICENSE file distributed with this source code. |
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*/ |
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namespace eZ\Publish\Core\Repository\Permission; |
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use eZ\Publish\API\Repository\PermissionResolver; |
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use eZ\Publish\API\Repository\PermissionCriterionResolver; |
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use eZ\Publish\API\Repository\Values\User\UserReference; |
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use eZ\Publish\API\Repository\Values\ValueObject; |
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/** |
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* Cache implementation of PermissionResolver and PermissionCriterionResolver interface. |
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* |
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* Implements both interfaces as the cached permission criterion lookup needs to be |
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* expired when a different user is set as current users in the system. |
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* |
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* Cache is only done for content/read policy, as that is the one needed by search service. |
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* |
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* The logic here uses a cache TTL of a few seconds, as this is in-memory cache we are not |
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* able to know if any other concurrent user might be changing permissions. |
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*/ |
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class CachedPermissionService implements PermissionResolver, PermissionCriterionResolver |
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{ |
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/** |
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* @var \eZ\Publish\API\Repository\PermissionResolver |
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*/ |
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private $permissionResolver; |
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/** |
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* @var \eZ\Publish\API\Repository\PermissionCriterionResolver |
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*/ |
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private $permissionCriterionResolver; |
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/** |
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* @var int |
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*/ |
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private $cacheTTL; |
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/** |
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* Cached value for current user's getCriterion() result. |
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* |
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* Value is null if not yet set or cleared. |
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* |
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* @var bool|\eZ\Publish\API\Repository\Values\Content\Query\Criterion |
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*/ |
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private $permissionCriterion; |
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/** |
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* Cache time stamp. |
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* |
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* @var int |
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*/ |
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private $permissionCriterionTimeStamp; |
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public function __construct( |
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PermissionResolver $permissionResolver, |
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PermissionCriterionResolver $permissionCriterionResolver, |
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$cacheTTL = 5 |
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) { |
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$this->permissionResolver = $permissionResolver; |
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$this->permissionCriterionResolver = $permissionCriterionResolver; |
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$this->cacheTTL = $cacheTTL; |
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} |
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public function getCurrentUserReference() |
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{ |
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return $this->permissionResolver->getCurrentUserReference(); |
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} |
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public function setCurrentUserReference(UserReference $userReference) |
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{ |
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$this->permissionCriterion = null; |
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return $this->permissionResolver->setCurrentUserReference($userReference); |
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} |
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public function hasAccess($module, $function, UserReference $userReference = null) |
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{ |
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return $this->permissionResolver->hasAccess($module, $function, $userReference); |
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} |
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public function canUser($module, $function, ValueObject $object, array $targets = []) |
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{ |
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return $this->permissionResolver->canUser($module, $function, $object, $targets); |
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} |
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public function getPermissionsCriterion($module = 'content', $function = 'read') |
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{ |
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// We only cache content/read lookups as those are the once frequently done |
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if ($module !== 'content' || $function !== 'read') { |
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return $this->permissionCriterionResolver->getPermissionsCriterion($module, $function); |
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} |
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if ($this->permissionCriterion !== null) { |
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// If we are still within the cache TTL, then return the cached value |
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if ((time() - $this->permissionCriterionTimeStamp) < $this->cacheTTL) { |
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return $this->permissionCriterion; |
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} |
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} |
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$this->permissionCriterionTimeStamp = time(); |
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$this->permissionCriterion = $this->permissionCriterionResolver->getPermissionsCriterion($module, $function); |
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return $this->permissionCriterion; |
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} |
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} |
ezsystems /
ezpublish-kernel
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: