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