Aws\DynamoDb\LockingSessionConnection::read PHP Метод

    public function read($id)
    {
        // Create the params for the UpdateItem operation so that a lock can be
        // set and item returned (via ReturnValues) in a one, atomic operation.
        $params = ['TableName' => $this->config['table_name'], 'Key' => $this->formatKey($id), 'Expected' => ['lock' => ['Exists' => false]], 'AttributeUpdates' => ['lock' => ['Value' => ['N' => '1']]], 'ReturnValues' => 'ALL_NEW'];
        // Acquire the lock and fetch the item data.
        $timeout = time() + $this->config['max_lock_wait_time'];
        while (true) {
            try {
                $item = [];
                $result = $this->client->updateItem($params);
                if (isset($result['Attributes'])) {
                    foreach ($result['Attributes'] as $key => $value) {
                        $item[$key] = current($value);
                    }
                }
                return $item;
            } catch (DynamoDbException $e) {
                if ($e->getAwsErrorCode() === 'ConditionalCheckFailedException' && time() < $timeout) {
                    usleep(rand($this->config['min_lock_retry_microtime'], $this->config['max_lock_retry_microtime']));
                } else {
                    break;
                }
            }
        }
    }