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