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