LiveBlocking::Start

Instructs the live gateway to start sending data. This call will block until the DBN metadata is decoded.

Info

A session cannot be started more than once.

Returns

DBN Metadata about the subscription(s).

API method 
1
Metadata Start();
Example usage 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
#include <databento/live.hpp>
#include <iostream>

using namespace databento;

auto client = LiveBlocking::Builder()
                  .SetKey("$YOUR_API_KEY")
                  .SetDataset("OPRA.PILLAR")
                  .SetCompression(Compression::Zstd)
                  .BuildBlocking();
client.Subscribe({"SPXW.OPT"}, Schema::Trades, SType::Parent);
auto metadata = client.Start();
std::cout << "DBN metadata version "
          // cast to avoid printing version as a char
          << static_cast<std::uint16_t>(metadata.version)
          << " and dataset " << metadata.dataset << '\n';
Example response 
1
DBN metadata version 3 and dataset OPRA.PILLAR