class NullLockBackend

Defines a Null lock backend.

This implementation won't actually lock anything and will always succeed on lock attempts.

Hierarchy

Expanded class hierarchy of NullLockBackend

Related topics

Locking mechanisms
Functions to coordinate long operations across requests.
1 file declares its use of NullLockBackend
NormalInstallerServiceProvider.php in core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php

File

core/lib/Drupal/Core/Lock/NullLockBackend.php, line 13

Namespace

Drupal\Core\Lock
View source 
class NullLockBackend implements LockBackendInterface {
    
    /**
     * Current page lock token identifier.
     *
     * @var string
     */
    protected $lockId;
    
    /**
     * {@inheritdoc}
     */
    public function acquire($name, $timeout = 30.0) {
        return TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function lockMayBeAvailable($name) {
        return TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function wait($name, $delay = 30) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function release($name) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function releaseAll($lock_id = NULL) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function getLockId() {
        if (!isset($this->lockId)) {
            $this->lockId = uniqid((string) mt_rand(), TRUE);
        }
        return $this->lockId;
    }

}

Members

Title Modifiers Object type Summary Overriden Title
NullLockBackend::$lockId protected property Current page lock token identifier.
NullLockBackend::acquire public function Acquires a lock. Overrides LockBackendInterface::acquire
NullLockBackend::getLockId public function Gets the unique page token for locks. Overrides LockBackendInterface::getLockId
NullLockBackend::lockMayBeAvailable public function Checks if a lock is available for acquiring. Overrides LockBackendInterface::lockMayBeAvailable
NullLockBackend::release public function Releases the given lock. Overrides LockBackendInterface::release
NullLockBackend::releaseAll public function Releases all locks for the given lock token identifier. Overrides LockBackendInterface::releaseAll
NullLockBackend::wait public function Waits a short amount of time before a second lock acquire attempt. Overrides LockBackendInterface::wait