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<?php
namespace OC\Files\Lock;
use OCP\Files\Lock\ILock;
use OCP\Files\Lock\ILockManager;
use OCP\Files\Lock\ILockProvider;
use OCP\Files\Lock\LockScope;
use OCP\PreConditionNotMetException;
class LockManager implements ILockManager {
private ?ILockProvider $lockProvider = null;
private ?LockScope $lockInScope = null;
public function registerLockProvider(ILockProvider $lockProvider): void {
if ($this->lockProvider) {
throw new PreConditionNotMetException('There is already a registered lock provider');
}
$this->lockProvider = $lockProvider;
}
public function isLockProviderAvailable(): bool {
return $this->lockProvider !== null;
}
public function runInScope(LockScope $lock, callable $callback): void {
if (!$this->lockProvider) {
$callback();
return;
}
if ($this->lockInScope) {
throw new PreConditionNotMetException('Could not obtain lock scope as already in use by ' . $this->lockInScope);
}
try {
$this->lockInScope = $lock;
$callback();
} finally {
$this->lockInScope = null;
}
}
public function getLockInScope(): ?LockScope {
return $this->lockInScope;
}
public function getLocks(int $fileId): array {
if (!$this->lockProvider) {
throw new PreConditionNotMetException('No lock provider available');
}
return $this->lockProvider->getLocks($fileId);
}
public function lock(LockScope $lockInfo): ILock {
if (!$this->lockProvider) {
throw new PreConditionNotMetException('No lock provider available');
}
return $this->lockProvider->lock($lockInfo);
}
public function unlock(LockScope $lockInfo): void {
if (!$this->lockProvider) {
throw new PreConditionNotMetException('No lock provider available');
}
$this->lockProvider->unlock($lockInfo);
}
}
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