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<?php
namespace Archivr\LockAdapter;
use Archivr\ConnectionAdapter\ConnectionAdapterInterface;
class ConnectionBasedLockAdapter extends AbstractLockAdapter
{
/**
* @var ConnectionAdapterInterface
*/
protected $connectionAdapter;
public function __construct(ConnectionAdapterInterface $connectionAdapter)
$this->connectionAdapter = $connectionAdapter;
}
public function isLocked(string $name): bool
return $this->connectionAdapter->exists($name . '.lock');
public function acquireLock(string $name): bool
$lockFileName = $this->getLockFileName($name);
if (!$this->hasLock($name) && !$this->connectionAdapter->exists($lockFileName))
$this->connectionAdapter->write($lockFileName, $this->getLockLabel());
$this->acquiredLocks[] = $name;
return $this->hasLock($name);
public function releaseLock(string $name): bool
if ($index = array_search($name, $this->acquiredLocks))
$this->connectionAdapter->unlink($this->getLockFileName($name));
unset($this->acquiredLocks[$index]);
return !$this->hasLock($name);
protected function getLockFileName(string $lockName): string
return $lockName . '.lock';
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