Tag Archives: Architecture

Exploring ASP.NET MVC application architecture

I am planning on exploring how to architect a good MVC application. During this exploration I found some interesting web-resources. I might be using this post in possible future blog posts as a reference.

Sample apps

I really think that looking at other peoples code can give you great ideas about what to do and what not. So here are some sample apps to look at. You could look at SharpArchitecture also as a sample app but I thought that one deserved a paragraph of it’s own.

  • I don’t know Rob Connery personally but you gotta love what he does. StoreFront, is his sample app. And you can find a lot about it here.
  • Read the separate Oxite paragraph for more details before downloading ! Oxite got a lot of bad credits but combined with the critics you can find it still has value in learning how to architect an MVC app or how not to architect an MVC app.
  • NerdDinner is rather basic but still is a nice starter with a free chapter of the “Proffesional ASP.NET MVC 1.0” book coming with it.
  • Codecamp server is on my list to explore, haven’t seen it yet. Is is part of the “ASP.NET MVC in Action” book.

SharpArchitecture

SharpArchitecture already has an architecture and while exploring it you can get very inspired. As far as I can tell there went a lot of thought in this architecture and for now I see it as a starting and reference point for my explorations.

You can find it here.

Oxite

When Oxite got out it got a lot of criticism, but also a lot of love to make it better. There is a lot to find in the comments about Oxite about what people expect from an MVC app.

  • This tweet from Simone Chiaretta is what most people thought about Oxite when it got out.
  • This post is my all-time Oxite favourite. Rob Connery gives explanations and solutions.
  • Chad Myers is a good second with also constructive comments
  • Although I don’t like the tone, this post still has some great comments.
  • A collection of Oxite tweets

Screen casts

Most screen casts are not on an architecture level, but I do believe that the more details you know, the better you can architect the application. Also you need to be aware that these screen casts might be about different versions of the MVC framework.

Books

  • This post by David Hayden says enough about some books, take your pick.
  • This is a nice Stackoverflow answer about some books.

Miscellaneous

I just had to mention these posts, but did not have a real category for it.

Other posts like this one

You wouldn’t have guessed it, but other people have collected resources too.

I hope everybody has just as much fun as I have exploring this. If anybody has something to add, please do so in  the comments.

Hooking into the world wide web.


Yesterday I taught a developer centric training class for starting in software architecture. During this class we discussed a few information sources on the web. While putting together the mail for the students in which I mention a lot of the information sources, I thought this would make a nice blog post. So here are the links.

 

Online rss readers:                                                                

http://www.bloglines.com/

http://www.google.com/reader/

 

Good rss feeds:

http://codebetter.com/

http://www.infoq.com/

http://architects.dzone.com/

http://nplus1.org/

http://blogs.msdn.com/jmeier/default.aspx (look at the pocket guides )

 

Link collections: (if you don’t want to plough through 320 feeds yourself)

http://www.arjansworld.com/

http://www.alvinashcraft.com/

http://blog.cwa.me.uk/

 

podcasts:

http://www.dotnetrocks.com/

http://www.hanselminutes.com/default.aspx

http://se-radio.net/

http://thirstydeveloper.com/default.aspx

 

screencasts

http://www.dnrtv.com/ (check out the design pattern series with JP Boodhoo shows 63,65,68,71,92)

http://channel9.msdn.com/

http://channel9.msdn.com/shows/ARCast_with_Ron_Jacobs/

 

free magazines

https://www.msarchitecturejournal.com/Default.aspx

http://www.microsoft.com/netherlands/studenten/informatie/dotnetmagazine.aspx (Dutch)

http://selfservice.abonneren.nl/titels/computable/abonneren.html;jsessionid=C7FD65099CA5399EA1133ED3BB9E2C12 (Dutch)

 

msdn:

http://msdn.microsoft.com/en-us/architecture/default.aspx

 

Good site for asking questions

http://stackoverflow.com/

 

Sogeti related sites (I work for Sogeti):

http://dsa.sogeti.nl/

http://www.clemensreijnen.nl/

http://blog.softwarefun.nl/ (not much to read yet J )

 

The list isn’t complete and it isn’t meant to be. I have given people my opml file with 320 feeds (No I don’t read them all completely) and it was just too much. This list is a way to get started.

 

Good additions are welcome in the comments off course.

Software Architecture 2008

This is the first in a two part blog-post about the software architecture 2008 conference in London.
barbican
The two parts consist of:

  1. The conference itself, the conference location and software architecture in general.
  2. Building domain-specific modeling languages

The conference was great, a wonderful location, fantastic speakers and a very diverse audience. The conference was held at the barbican conference centre.

The blog posts are based on sessions from the following speakers:

Still there is a need for defining an architect and defining architectures, the key note and some sessions started with definitions. For defining an architecture there are some pretty good definitions that most people can agree upon.

“The software architecture of a program or computing system is the structure or structures of the system, which comprise software elements the externally visible qualities of those elements, and the relationship among them.”
Len Bass, Paul Clements and Rick Kazman (SEI)
“All architecture is design but not all design is architecture. Architecture represents the significant design decisions that shape a system, where significant is measured by cost of change.”
Grady Booch
“The set of design decisions that, if made wrongly, causes your project to be cancelled”
Eoin Woods
“Architecture is the art of how to waste space.”
Philip Johnson

But when it comes to defining an architect the definitions are less clear and mostly boil down to a list of synonyms or a list of characteristics, skills or activities of an architect.

Synonyms
Enterprise Architecture: enterprise Architect, functional architect, business architect, strategic architect, domain architect, stream architect, …
System Architecture: software architect, solutions architect, application architect, systems architect, technical architect, …
Infrastructure Architecture: Infrastructure architect, technical architect, technology architect, database architect, middleware architect, network architect, database architect, storage architect, …

The characteristics could be distilled out of the key-note. Among other characteristics an architect needs to fight being human. An architect must fight the urge for

  • New and complex solutions (Fashion driven development)
  • Pursuing possible solutions too far
  • Just having faith (Faith based coding)
  • His own habits
  • Resolving every uncertainty right away (sometimes the right decision is to wait)

Most speakers did seem to agree on a certain skill set.

  • An architect needs street credibility
    • A relation to the code (preferably code himself)
    • Have the big picture to code detail
    • Cannot immerse in code completely
  • A solid technical background that isn’t just history
  • Communicator, appreciate other mindsets.
  • Needs design skills
  • Leadership skills
  • Coaching skills

One of things that was most prominent present was the need for architects to be more agile. Philippe Kruchten also held a session on the same topic on the 18th of june . This talk was an initiative by Logica’s guru4Pro and worthy of a blog post in itself. At the software architecture 2008 conference the message was clear. We need to be more agile to create more sustainable software and projects fail because we are not agile enough. To get an idea, watch the presentation from Kevlin Henney and James Coplien at infoq ( Agile Architecture is not Fragile Architecture ). What you could get from the conference, Philippe Kruchten and the presentation is:

On every project ask yourself: how much architecture do I need and how agile can I be to make this project a success !

In the key-note Kevlin Henney mentioned the Dreyfus Model of Skill Acquisition. This model recognizes five stages of skill acquisition.

  • Novice
  • Advanced Beginner
  • Competent
  • Proficient
  • Expert

According to Kevlin Henney at the novice level people try to learn the rules, when people start to be competent they start to bend the rules and finally the expert recognizes that the rules depend on the context. That is why when you a ask an expert architect a question, nine out of ten times the answer is “it depends“.

And yes, the answer always depends on the context.

Kevlin Henney mentions that the emphasis on context is mostly his own (as are his jokes!), as this comes from patterns, but some of the detail and framing has been inspired and influenced by Andy Hunt and Dave Thomas (the Pragmatic Programmers) and Dan North (better-best-practices).

Let’s make a step in becoming more of an expert in software architecture and recognize that also when :

  • you define an architecture
  • you define an architect
  • you write down what the characteristic of an architect are
  • you determine the tasks of an architect
  • you define the skills that an architect needs
  • you determine how agile a project must be
  • you determine how much architecture a project needs

It depends on the context.

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