v4.0.0

• [MDAPI-38][C++] Add MultipleMarketDepthSample sample
  • Added MultipleMarketDepthSample sample.
  • Added AuthSample sample.
  • Added ReconnectSample sample.
  • Added IncOrderSnapshotSample sample.
• Migrated to Graal SDK v2.1.2
• [MDAPI-211][C++] Implement logging management
  • Added Logging class.
• [MDAPI-82][C++] Implement MarketDepthModel
  • Added MarketDepthModel class.
  • Added MarketDepthModelListener class.
• [MDAPI-84][C++] Implement TimeSeriesTxModel
  • Added TimeSeriesTxModel class.
• [MDAPI-83][C++] Implement IndexedTxModel
  • Added TxModelListener class.
  • Added IndexedTxModel class.
  • Added EventSourceWrapper class needed to pass heterogeneous event sources using a container.
• [MDAPI-79][C++] Retrieve promise-based events from feed
  • Added PromiseList<E> class where E - event type: a list of event receiving results that will be completed
    normally or exceptionally in the future.
    It is a std::vector<Promise<std::shared_ptr<E>>> wrapper with Graal semantics.
  • Added Promise<void> class.
  • Added Promises class: utility methods to manipulate Promise<> promises.
    • Added Promises::allOf(Collection &&collection) method that returns a new promise that completes when all
      promises from the given collection complete normally or exceptionally.
  • Fixed the Promise<std::shared_ptr<E>> semantics.
  • Added DXFeed::getLastEventPromise method.
  • Added DXFeed::getLastEventsPromises method.
  • Added DXFeed::getIndexedEventsPromise method.
  • [BREAKING] The DXFeed::getTimeSeriesPromise now returns
    std::shared_ptr<Promise<std::vector<std::shared_ptr<E>>>>
  • [BREAKING] The IndexedEventSubscriptionSymbol::getSource method now returns
    std::unique_ptr<IndexedEventSource>