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