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  • Blog Post: Dynamic Union

    Let’s say there are several agents – e.g. devices – producing temporal streams. It may be interesting to merge these sequences into a single stream that can be processed by StreamInsight. The “union” operator allows you to merge a fixed number of inputs, but what happens...
  • Blog Post: LINQ Queries as Streams and Thread Safety

    A few weeks ago, Torsten Grabs – a colleague on the StreamInsight team and accomplished violist – came to me with a potential bug. He was seeing an ADO.NET SqlClient exception when running a StreamInsight query: “ There is already an open DataReader associated with this Command which must be closed first...
  • Blog Post: LINQ Macros

    A colleague was asking how to construct a particular LINQ “operator macro” today. Basically, he was finding it inconvenient to repeat boilerplate for particular operator patterns in his code, but was struggling to inline expression snippets into LINQ query expressions. Thought I’d share a sample macro...
  • Blog Post: StreamInsight Sequence Integration: Five Easy Pieces

    Over the past few weeks, I’ve spent time building a handful of applications using the new sequence integration APIs in StreamInsight 1.1. I think StreamInsight veterans will be pleasantly surprised at the seamlessness of the experience! If you’re new to StreamInsight, now’s your chance to quickly build...
  • Blog Post: Using and Discovering StreamInsight Instances

    Embedding a StreamInsight server instance in your application is easy: using (var server = Server.Create("Default")) { … } But there’s a hitch. What does“Default” mean? If you’ve spent time with the StreamInsight samples, you might imagine the “Default”...
  • Blog Post: Scripting StreamInsight queries

    Over the past couple of weeks, a handful of people have asked for help dynamically creating StreamInsight queries. I usually scrawl some boxes and arrows on the whiteboard and say “you could try something like this…” My hand-waving hasn’t been very helpful. I’ll write some...
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