Contents tagged with CEP
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Samples and Slides from Alt.Net Meet up on the Reactive Extensions
The code samples and PowerPoint deck from my presentation on the RX to the New York ALT.NET group are available (and updated) on MSDN Code samples:
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Converting a polling based API into a streaming API with the Reactive Extensions
Recently my building has been having issues with its boilers, and the heat has been going out for longer than is comfortable. The superintendent that makes a habit of periodically checking on the status of each of the boilers. A workable approach certainly, but figured this would be ideal for a technology assist.
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Streaming OLAP with the Reactive Extensions (RX) for .Net
Streaming OLAP is something that comes up over and over again in the “CEP space” – using the Reactive Extensions for .Net this demo shows the basics; filtering, grouping, aggregates, and concurrent queries.
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CEP Style Sliding windows in the RX – Take 2
The bug I mentioned in my first attempt at a sliding window was the minor issue that the aggegates never went down to 0, even if the window had emptied out.
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Reactive Framework available from DevLabs
Downloads of the Reactive Framework (RX) can now be found at MS DevLabs. Versions for 3.5 SP1, 4.0 Beta, and Silverlight 3 are available. Interestingly, the API size appears to be substantially larger than the preview which was leaked as part of the Silverlight 3 Toolkit. That DLL was all of 84KB, the current release is weighs in at 283KB.
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From the ReactiveFramework to StreamInsight and Back
In my last post I showed how to send StreamInsight output streams to a UI via the ReactiveFramework. Here’s we’ll do the reverse, by sending an RX stream into a CEP stream. Instead of a partial example, I’ll use an end to end example showing simulated stock ticks, computing the 5 min rolling VWAP, and showing the results on a UI.
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Routing StreamInsight output streams to a UI
One compelling feature of StreamInsight is it’s in-process hosting model. In addition to reducing the complexity of server side installs, it’s now possible to have a CEP engine in the client UI.
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Exploring the Reactive Framework part II
Talk around the water cooler is that it might be possible to use the Reactive Framework for some lightweight CEP.
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Preview of the Reactive Framework available via Silverlight Toolkit
Via Jafar Husain - it appears that there’s a early release of the Live Labs Reactive Framework (& with Brian Beckman and Erik Meijer) in the latest Silverlight Toolkit
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Some interesting sessions at the Microsoft Enterprise Developer and Solutions Conference