My Favorite SOA Patterns

The Publish Subscribe Pattern in C# and some gotchas | Posted on April 17, 2013 by Anuj Varma

NOTE: With the introduction of two new interfaces in .NET 4.0, there is a cleaner way to implement the Publish Subscribe pattern in C# .NET. However, the ‘gotchas’ listed here still apply. Even with the new interfaces, one still needs … Continue reading →

A flexible service oriented architecture that handles multiple platforms (multiple devices, multiple databases…) | Posted on April 24, 2012 by Anuj Varma

The Problem Statement
Imagine that you have just built a sophisticated application to work against a SQL Server database. You followed a best-practices approach and separated out your presentation, business logic and data access layer. Your application is service oriented – … Continue reading →

Abstract Factory– Equally useful for manufacturing operations (services) and products | Posted on September 21, 2011 by Anuj Varma

This article assumes some familiarity with the Factory pattern. The factory concept is equally useful for creating products (ProductFactory) or for creating services (ServiceFactory). A good way to start is to look at what the client really needs from the … Continue reading →

WCF and Publish Subscribe–A Full Example: Running the Client (Subscriber) | Posted on July 28, 2011 by Anuj Varma

This entry is part 6 of 6 in the series WCF Publish Subscribe - A Full Example in C#, Step by Step

This entry is part 6 of 6 in the series WCF Publish Subscribe – A Full Example in C#, Step by StepNow that all the pieces are in place, we are ready to run our client program. The first error … Continue reading →

WCF and Publish Subscribe–A Full Example: Client Code | Posted on July 28, 2011 by Anuj Varma

This entry is part 5 of 6 in the series WCF Publish Subscribe - A Full Example in C#, Step by Step

This entry is part 5 of 6 in the series WCF Publish Subscribe – A Full Example in C#, Step by StepThe subscriber needs to know about the service. We will use svcutil.exe to generate the proxy class for the … Continue reading →

WCF and Publish Subscribe–A Full Example: The Event Generator | Posted on July 28, 2011 by Anuj Varma

This entry is part 4 of 6 in the series WCF Publish Subscribe - A Full Example in C#, Step by Step

This entry is part 4 of 6 in the series WCF Publish Subscribe – A Full Example in C#, Step by StepThe purpose of the Event Generator code is to publish events (New Magazine Issue Available) that subscribers will get … Continue reading →

WCF Publish Subscribe– A Full Example: The Service Side Part 2 (Implementation) | Posted on July 28, 2011 by Anuj Varma

This entry is part 3 of 6 in the series WCF Publish Subscribe - A Full Example in C#, Step by Step

This entry is part 3 of 6 in the series WCF Publish Subscribe – A Full Example in C#, Step by StepOur implementation is based on .NET events. The idea of publishing goes hand-in-hand with ‘raising an event’ – and … Continue reading →

WCF Publish Subscribe–A Full Example – The Service Side Part 1 (Interface) | Posted on July 28, 2011 by Anuj Varma

This entry is part 2 of 6 in the series WCF Publish Subscribe - A Full Example in C#, Step by Step

This entry is part 2 of 6 in the series WCF Publish Subscribe – A Full Example in C#, Step by StepThe Service code contains of an Interface and its implementation

The Interface defines all the capabilities of the service. What … Continue reading →

WCF and Publish Subscribe– A Full Example: Introduction | Posted on July 28, 2011 by Anuj Varma

This entry is part 1 of 6 in the series WCF Publish Subscribe - A Full Example in C#, Step by Step

This entry is part 1 of 6 in the series WCF Publish Subscribe – A Full Example in C#, Step by StepImagine that you are a magazine publishing company. Your revenue depends on subcribers – in particular, happy subscribers. To … Continue reading →