google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode */ class ReadLockMode { /** * Default value. * If the value is not specified, the pessimistic read lock is used. * * Generated from protobuf enum READ_LOCK_MODE_UNSPECIFIED = 0; */ const READ_LOCK_MODE_UNSPECIFIED = 0; /** * Pessimistic lock mode. * Read locks are acquired immediately on read. * * Generated from protobuf enum PESSIMISTIC = 1; */ const PESSIMISTIC = 1; /** * Optimistic lock mode. * Locks for reads within the transaction are not acquired on read. * Instead the locks are acquired on a commit to validate that * read/queried data has not changed since the transaction started. * * Generated from protobuf enum OPTIMISTIC = 2; */ const OPTIMISTIC = 2; private static $valueToName = [ self::READ_LOCK_MODE_UNSPECIFIED => 'READ_LOCK_MODE_UNSPECIFIED', self::PESSIMISTIC => 'PESSIMISTIC', self::OPTIMISTIC => 'OPTIMISTIC', ]; public static function name($value) { if (!isset(self::$valueToName[$value])) { throw new UnexpectedValueException(sprintf( 'Enum %s has no name defined for value %s', __CLASS__, $value)); } return self::$valueToName[$value]; } public static function value($name) { $const = __CLASS__ . '::' . strtoupper($name); if (!defined($const)) { throw new UnexpectedValueException(sprintf( 'Enum %s has no value defined for name %s', __CLASS__, $name)); } return constant($const); } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(ReadLockMode::class, \Google\Cloud\Spanner\V1\TransactionOptions_ReadWrite_ReadLockMode::class);