Posts

Book Study: Patterns-Principles and Practices of Domain Driven Design

Book Study: As title Summary In summary this is an excellent book.  It is really accessible but some of the more advanced areas will need further reading elsewhere. For example, things like Aggregate design  If you are involved in Enterprise application development and you haven't yet been able to take advantage of the Domain Driven Design (DDD) philosophy, this book will show you the way. I know this because it is almost like a narrative to my experiences of the philosophy at a large e-commerce website in terms of some of the problems experienced, practices adopted, conversations with the business and stakeholders, patterns used, misused, abused and not used and every conversation about everything in DDD in-between. Go Compare I previously read the fist 3 chapters  of Vaughn Vernon's Implementing DDD book and I ran out of steam for various reasons (the birth of my second son primary amongst them). Its not that it isn't a good book (I refer to it later on and why

Twilosophy\Twitosophy

Observations of the space at present.  Tongue in cheek of course Twilosophy\Twitosophy. I don't usually offer much opinion in what I do. I  sit on the fence alot, maybe I shouldn't . However, when I do, I try to base what I know on what I really know, not on what other people tell me I need to know.  I'm sure what I am observing has been commented on before, and maybe other people agree or not, but reading a post on Twitter and then using it as your own keen insight  or shallowly cited insight is more of an indication of your lack of ability instead of  just keeping schtum or just saying "I dont know", where more respect would probably be gained.  The above practice seems to be rife in software development at the moment.  I'd be a hypocrite if I said I hadn't fallen into the trap, but - like a recovering alcoholic - I have realised the errors of my ways and I am standing up and saying my name is Colin and I am a twitosopher (at times)  and shallow

Sql Static Code Analysis (revisited)

Static Code Analysis. You may remember my opening gambit in a post about SSDT code analysis talking about coding standards back in May 2014 (but most probably not)  It went something like.... Coding standards (and more latterly styles) in any organisation of any size are liable to incite religious wars and makes zealots out of even the most considered or apathetic of us.   Inconsistency and subjectivity,  lack of enforcement and heavy handedness all contribute to the contempt often levelled at them... blah blah Contributing to solving the problem. As part of one of our projects we had some funding to invest some time  and dev into SQL static code analysis, after researching what was available we had the green light to incorporate analysis written to leverage the SSDT code analysis framework into our own CI/CD ALM framework.  The appetite for this waned somewhat with the DB community having their own take on what they wanted to use, but the code lives on and some small bits of w

Async/Await Revisited

I put up an article back in November '14 about using async/await for a toy project I had created.   I have now had a chance to use it for "real work" and, as a result, have had a chance to research the language feature in more depth and have come up with a list of considerations, resources, gotchas and tid-bits.    Must Reads There is a lot of literature available for this feature and plenty of MSDN articles and Stack Overflow related help, however, I'd highly recommend the following books for greater insight into TAP, TPL and async/await:  CLR via C# (Fourth edition for async/await content), Jeffrey Richter Concurrency in C# Cookbook, Stephen Cleary Async in C# 5.0 ,  Alex Davies Blogs by the latter two also cover this feature in great detail. They all overlap in their coverage on async/await. As an aside, the first book I would recommend to any serious C# developer anyway, I'd say its on a par with the "C Programming language by Kernighan

A little bit of powershell in my life

Things were so simple then. Having used 'nix at University and a bit beyond  I came to love scripting, using things like Bash and tcl,  prior to that I had just written a few simple batch scripts in DOS.    Excluding JavaScript from the fray which doesn't, arguably, fit in the same category as lower level scripting languages I really haven't done much apart from a bit of Perl and  although its called a scripting language it is a high level programming language.  Years later, and after having been indoctrinated into the Microsoft Stack, I have hardly written any scripts or have had any need to, but that is changing. ALM My current place has a few bits of software that use Powershell and, some,  lots of it. Its the tool/language of choice for the ALM framework developed in house, used to push software out from local environments to production  environments (in some cases).  The framework consists of 100s of scripts and XML configuration files, to map to the myriad of

Messaging and transient issues.

Messaging and transient issues. A small post but something worth considering.  Recently when discussing a situation where a MongoDB replica set was in the process of failing over, concern was raised about writing data - whilst a new primary was being elected.  This is going to be a transient issue and issues similar to it - such as temporary server outages and routing  are too .   They are going to take a little time to resolve but should resolve fairly quickly. In the meantime, there a re a few solutions available whilst this transient issue sorts itself out:   Do nothing.  In this case give up and find another job  you lazy hacker. Let the process fall over, report  the failure to users and let them try again via a button click. A users experience might be sullied - in the opinion of some -  but it still could be a reasonable way to recover (this depends on what stakeholders/business think really).  This might not be reasonable for important information which must stored

Async/Await

Async/Await As I am sure you are aware, this is not a new feature in .NET - having been around for over a year as part of .NET 4.5. There have been plenty of posts about it, and so I'm not going to go into a great deal of depth, as I am not an expert and there are people who have gone into it in more depth than I could.  I just want to get a couple of  the key concepts up and provide a laymans tilt on it.  I've been using the language feature as part of a site I am developing as a platform to testbed a few technologies including: Knockout.Js,  The continuous integration and continuous deployment capabilities of  Visual Studio Online (formerly Team Foundation Service) WebAPI and integrating with 3rd party  web services Some of the newer C# language features  Bootstrap templates  Stanford Core NLP for .NET    The site is work in progress and is available @ http://wearedev.azurewebsites.net/ The main purpose of the site is as a front end for a simple aggregatio