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<?php |
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namespace Tarantool\SymfonyLock; |
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use InvalidArgumentException; |
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use Symfony\Component\Lock\Exception\InvalidTtlException; |
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use Symfony\Component\Lock\Exception\LockConflictedException; |
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use Symfony\Component\Lock\Key; |
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use Symfony\Component\Lock\PersistingStoreInterface; |
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use Symfony\Component\Lock\Store\ExpiringStoreTrait; |
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use Tarantool\Client\Client; |
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use Tarantool\Client\Exception\RequestFailed; |
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use Tarantool\Client\Schema\Criteria; |
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use Tarantool\Client\Schema\Operations; |
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use Tarantool\Client\Schema\Space; |
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class TarantoolStore implements PersistingStoreInterface |
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{ |
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use OptionalConstructor; |
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use ExpiringStoreTrait; |
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/** |
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* Expiration delay of locks in seconds |
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*/ |
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protected int $initialTtl = 300; |
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/** |
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* Space name |
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*/ |
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protected string $space = 'lock'; |
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protected function validateOptions() |
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{ |
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if ($this->initialTtl <= 0) { |
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1 |
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$message = sprintf( |
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'InitialTtl expects a strictly positive TTL. Got %d.', |
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$this->initialTtl |
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); |
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throw new InvalidTtlException($message); |
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} |
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if ($this->space == '') { |
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throw new InvalidArgumentException("Space should be defined"); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function delete(Key $key, ?string $token = null) |
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{ |
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$arguments = [ |
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(string) $key, |
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$token ?: $this->getUniqueToken($key), |
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]; |
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$script = <<<LUA |
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local key, token = ... |
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local tuple = box.space.$this->space:get(key) |
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if tuple and tuple.token == token then |
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box.space.$this->space:delete(tuple.key) |
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end |
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LUA; |
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$this->client->evaluate($script, ...$arguments); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function exists(Key $key) |
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{ |
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$data = $this->client |
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->getSpace($this->space) |
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->select(Criteria::key([ (string) $key ])); |
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if (count($data)) { |
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[$tuple] = $data; |
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return $tuple[1] == $this->getUniqueToken($key) |
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&& $tuple[2] >= microtime(true); |
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} |
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return false; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function putOffExpiration(Key $key, float $ttl) |
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{ |
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1 |
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if ($this->exists($key)) { |
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1 |
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$key->resetLifetime(); |
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1 |
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$key->reduceLifetime($ttl); |
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1 |
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$this->getSpace()->update( |
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[ (string) $key ], |
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Operations::set(2, $this->getExpirationTimestamp($key)), |
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); |
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} |
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1 |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function save(Key $key) |
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{ |
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$key->reduceLifetime($this->initialTtl); |
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try { |
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$tuple = [ |
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(string) $key, |
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$this->getUniqueToken($key), |
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$this->getExpirationTimestamp($key), |
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]; |
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$this->getSpace()->insert($tuple); |
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$this->checkNotExpired($key); |
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} catch (RequestFailed $e) { |
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2 |
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$data = $this->client |
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->getSpace($this->space) |
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->select(Criteria::key([ (string) $key ])); |
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2 |
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if (count($data)) { |
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[$tuple] = $data; |
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2 |
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if ($tuple[1] == $this->getUniqueToken($key)) { |
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$this->checkNotExpired($key); |
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return true; |
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} |
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if ($tuple[2] < microtime(true)) { |
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$this->delete($key, $tuple[1]); |
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return $this->save($key); |
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} |
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} |
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throw new LockConflictedException(null, null, $e); |
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} |
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} |
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protected function getUniqueToken(Key $key): string |
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{ |
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if (!$key->hasState(__CLASS__)) { |
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$token = base64_encode(random_bytes(32)); |
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$key->setState(__CLASS__, $token); |
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} |
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return $key->getState(__CLASS__); |
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} |
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5 |
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protected function getExpirationTimestamp(Key $key): float |
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{ |
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return microtime(true) + $key->getRemainingLifetime(); |
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} |
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5 |
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protected function getSpace(): Space |
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{ |
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5 |
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return $this->client->getSpace($this->space); |
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} |
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} |
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tarantool-php /
symfony-lock
