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