ETA elektron upa eta api eta consumer example eta consumer eta c java c++ source directory ssl reconnect c ezd eta c++ trcc linux elektronsdk eta shared library idn MarketFeed reactor callback symbol list dictionary eta decode DACS elektron sdk c view refresh token Service upa reactor connect reconnect up ready ssl eta migrate connect corrupt stress test multi-thread dispatch rssl_mc_update rsslmap empty java upa elektron-direct-feed edf documentation segfault rssl_rc_cet_channel_down_reconnecting ema api utilization overrun rtl rdf-d status elecktron timestamp search symbollist exchangelist symbols-by-exchange load balance warm standby upa training module rssl_ret_invalid_data rssl_ret_incomplete_data batchrequest streamid bds reboot sdk version conditional compilation rssl stale batch size limit maximum rssl state error code map idn_rdf Blank_Field ni provider rsslstate rssl_stream_close rtmes negative ric rsslfieldlist rsslfieldentry service id service name dictionary for services dictionary in data centers millisecond _ms convert millisec disconnect failover resiliency secure OMM analytics elektron sdk - java trade identify trade data model elektron sdk eta api status dictionary reuse suspect eta fid number acronym snapshot snapshot with open stream quotes equity quotes mrn electron vaconsumer rdm rssl_mc_status missing data missing documentation eta sbe rwf omm enum enum description market_by_price hkex performance monitoring slow consumer cusip ric electron api esdk build open-source 1.2.0 price fields eta trcc trcc eta signals t batch request FID 64 bit java api nfd ert in cloud aws login stream handle group status events capabilities sink driven source ADS rdm_directory_service_group_id rsslbuffer group