dxFeed Bloghttp://www.dxfeed.com/blog/Blog about dxFeed services and QDS technologyMon, 20 Feb 2012 18:06:02 +0000(c) 2011, Devexpertsen-USSquarespace Site Server v5.11.81 (http://www.squarespace.com/)onDemand historical tick data service online demo is now availableonDemanddxFeedMon, 20 Feb 2012 18:01:19 +0000http://www.dxfeed.com/blog/2012/2/20/ondemand-historical-tick-data-service-online-demo-is-now-ava.html474882:5375509:15115253Have a look at our online demo data extractor for onDemand historical tick data: http://www.dxfeed.com/historical-tick-data/.


For this demo only limited set of data is made available (the Flash Crash day of May 6, 2010). 
Please contact us for more information about the service and different ways to access our tick-level historical data store.

]]>http://www.dxfeed.com/blog/rss-comments-entry-15115253.xmldxFeed/QDS API 3.100 releasedReleasesdxFeed APIdxFeedWed, 25 Jan 2012 23:35:05 +0000http://www.dxfeed.com/blog/2012/1/25/dxfeedqds-api-3100-released.html474882:5375509:14732975Available at: http://www.dxfeed.com/downloads/api-and-samples/java/3100/

DXFeed API: Update to version 3.1xx with support for Candles and time series

INCOMPATIBLE CHANGES:
  • DXFeed.createConnectedFeed method is removed. Use DXEndpoint to create connection. See DXFeed class javadoc for details.
  • "com.dxfeed.api.event" package is renamed to "com.dxfeed.event.market". Package contents did not change (the same Quote, Trade, TimeAndSale, etc classes are there)
  • DXFeedSubscriptionChangeListener is moved to another package and renamed to ObservableSubscriptionChangeListener. This change should not affect feed consumers.
NEW FEATURES:
  • "com.dxfeed.event.candle" package is introduced with a set of CandleXXX classes to receive chart candles.  Candle class represents one Open-High-Low-Close-Volume candle with auxiliary information.    Use instances of CandleSymbol class to specify which Candles to subscribe to.
  • "DXFeedTimeSeriesSubscription" class is introduced to subscribe to time series (history) of past events in addition to all new/current events. It is designed to be used with TimeAndSale and Candle events.
  • "DXFeed.createTimeSeriesSubscription" method is introduced.  DXFeed API: Update to version 3.1xx with support for Candles and time series

 

]]>http://www.dxfeed.com/blog/rss-comments-entry-14732975.xmlQDS transport and networkingQDSarchitecturenetworkingtransportRoman ElizarovWed, 28 Dec 2011 10:13:42 +0000http://www.dxfeed.com/blog/2011/12/28/qds-transport-and-networking.html474882:5375509:14352813Introduction into QDS architecture" I gave a short overview of the overall QDS design. Today I'll explain the basics of QDS transport and networking architecture.]]>http://www.dxfeed.com/blog/rss-comments-entry-14352813.xmlIntroduction into QDS architectureQDSarchitecturedxFeedMon, 05 Dec 2011 12:56:39 +0000http://www.dxfeed.com/blog/2011/12/5/introduction-into-qds-architecture.html474882:5375509:13980590http://www.dxfeed.com/blog/rss-comments-entry-13980590.xmldxFeed/QDS API 3.85 releasedReleasesdxFeed APIdxFeedMon, 21 Nov 2011 23:36:09 +0000http://www.dxfeed.com/blog/2011/11/21/dxfeedqds-api-385-released.html474882:5375509:13817439http://www.dxfeed.com/blog/rss-comments-entry-13817439.xml