Asynchronous Messaging @DNUG Cologne, 07.04.2009
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A presentation by Sergey Shishkin on Asynchronous Messaging given on 07.04.2009 at .NET User Group Cologne.
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A distributed system in its most simplest definition is a group of computers working together as to
appear as a single computer to the end-user. These machines have a shared state, operate
concurrently and can fail independently without affecting the whole system’s uptime.
This is in line with ever-growing technological expansion of the world, distributed systems are
becoming more and more widespread. Take a look at the increasing number of available
computer technologies/innovation around, this is sporadically increasing, and this result in
intense computational requirement.
Yeah, Moore’s law proposed more computing power by fitting more transistors (which
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A distributed system in its most simplest definition is a group of computers working together as to
appear as a single computer to the end-user. These machines have a shared state, operate
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This is in line with ever-growing technological expansion of the world, distributed systems are
becoming more and more widespread. Take a look at the increasing number of available
computer technologies/innovation around, this is sporadically increasing, and this result in
intense computational requirement.
Yeah, Moore’s law proposed more computing power by fitting more transistors (which
approximately doubles every two years) into a simple chip using cost-efficient approach - cool,
but over the past 5 years, there has been little deviation from this - ability to scale horizontally
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Asynchronous Messaging @DNUG Cologne, 07.04.2009
- 1. Asynchronous Messaging Sergey Shishkin http:// shishkin.org Image source: http://www.flickr.com/photos/joits/1110215271/
- 2. Agenda Why Messaging? – And what’s wrong with good old RPC? Sample scenario – News module of the Prism’s StockTrader RI Under the hood of Message Bus – Building a Message Bus in 37 lines of code – And what those 37 lines did not cover? Image source: http://www.flickr.com/photos/mychatham/206928250/
- 6. Tenets of Service-Orientation* Image source: http://www.flickr.com/photos/hyper-world/2401419260/ Boundaries are explicit Services are autonomous Services share schema and contract, not class Service compatibility is based upon policy * http://msdn.microsoft.com/en-us/magazine/cc164026.aspx
- 7. Messaging Patterns * http://www.enterpriseintegrationpatterns.com/toc.html Message Bus is a central place for implementing integration patterns*
- 8. Advantages of Messaging (I) Image source: http://www.flickr.com/photos/renaissancechambara/2288556895/ Loose coupling Separation of concerns Orthogonal architecture
- 9. Advantages of Messaging (II) Testing Scalability
- 12. Look ahead Messaging is the default communication style for cloud-based services Silverlight does not support synchronous communication out of the box Image source: http://www.flickr.com/photos/bestrated1/2441332480/
- 13. DEMO