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This post is part of a series diving into the implementation of the @home With Windows Azure project, which formed the basis of a webcast series by Developer Evangelists Brian Hitney and Jim O’Neil. Be sure to read the introductory post for the context of this and subsequent articles in the series.
As a quick review, the @home with Windows Azure project involves two applications hosted in Windows Azure:
The relationship of the two applications is depicted in the architecture slide to the right, and for the purposes of this and the subsequent posts in my blog series I’ll be concentrating on the highlighted Azure@home piece (for additional context see the introductory blog post of this series).
The source code for Azure@home is available as both Visual Studio 2008 and Visual Studio 2010 solutions and comprises five distinct projects, as you can see when opening the solution file in Visual Studio or Visual Web Developer Express; I’ll be using Visual Studio 2010 from here on out.
Note there are two distinct paths through the application, one denoted by blue, numbered circles and the other by the two green, lettered circles; I’ll start with the blue ones.
Steps 5 through 8 continue until the FAH client has completed a work unit, at which point the FAH process (started in step 4) ends, and the worker role reinitiates step 3, the polling process. The client table’s record will be in place then, so the poll will be immediately successful, another FAH process is started, and the cycle continues ad infinitum.
The second path through the application is a simple one.
Next time we’ll crack open the WebRole code and dive into steps 1 and 2 above.