eta-api elektron-sdk elektron rrt refinitiv-realtime elektron-transport-api java #technology c++ rssl trep reactor rcc-api connection c refinitiv-realtime-sdk source-directory rrto symbology rics batch consumer elektron-data-dictionary fields api ssl log-in refinitiv-real-time contributions Service token eikon DACS market-by-price market-feed encoding multi-threading refinitiv-realtime-optimised rdm callback ADS api-limits rcc #content #product build locking linux status non-interactive-provider trade watchlist dispatch sink-driven-source open-source rfa error symbol-list exchanges constituents ipa monitoring documentation sequence stale failover quote issue refresh-message service-name disconnection volume snapshot-pricing date aws search ema-api subscription events sdk message pricing rdf conflation upa tls load-balancing docker OMM commodities mrn stress-test chain-ric service-dictionary elektron-direct-feed compile ADH equities RWF performance time-stamp fanout service-id stream-id data-model refinitiv-real-time-optimised enum tick-history-rest-api 64-bit unsubscribe