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