Virtual PC performance tip Multi-core support
I often get to work with brilliant people. That’s one the real benefits of being a consultant, I would argue. Last week I got to know Thomas Gyllencreutz that came onboard my project. He didn’t waste any time to get the performance in our virtual development environments to new heights. This post is a condensation of his findings that really got our Virtual PC images flying. A general performance tip is to put your virtual hard drive (.vhd-file) on a separate hard drive, as suggested by mr Hanselmann. OK, to get the multi-core support you’ll need to find out how many cores your system have. The easiest way to do that is to open Task Manager (CTRL+SHIFT+Esc) and check the number of CPU-boxes under the performance tab: This guide expects you to have a existing .VHD-file. The one with the performance you want to boost ;). The guide also works...
A story on specification by example in two projects
The last month I’ve read The Goal by Eliyahu M. Goldratt. Apart from being a great book it was also written in a really interesting way. It’s a novel in which we follow mr Alex Rogo and how he learns the subject of the book Theory of Constraints. I thought that I might try to mimic that style a bit in this post. The subject I’m getting back to again and again nowadays is agile for the whole project. In my opinion agile thoughts often come from development and never gets a good foothold in the analysis/requirements or in the testing departments. “Yes, by all means… Do this agile you like so much but please let us write the specs and test cases as we always have done.” – is a common reasoning where I’ve been. OK – on to the story. It comes in two flavors, set in in...
Using BDD with SpecFlow, WPF and White
It’s been a while since I blogged. Twitter is taking over. I compensate that with a major blog post. Background I written about the project I’m in right now a couple of times before and to make a long story short; we don’t have any requirements! We only have the existing application which we are to “convert” from VB6 to VB.NET. 1:1 is the mantra – which is to be understood as: functional the same. I have suggested for the team that we work with BDD (or ATDD if you like) to create the requirements as we go. They liked it. A lot! To not let this post grow totally out of control, I leave the description for that process to another post. To put my money where my mouth is and show them how it should be accomplished. This blog post is that description. Solution and tools SpecFlow The...
Solution to closing the lid of my MacBook cause it to get VERY hot
OK – this might not be one of my ordinary subjects but this was soooo annoying. Sometimes when I closed the lid of my MacBook Pro there were something still running. This caused the battery to drain in about 20 minutes and the computer to go very, very hot. For the first time ever I actually burned myself on a computer. I have checked around the net for a solution, and even went into a MacStore but as the error comes and goes there’s not much security in the tips. As suspected one process doesn’t have time to close down and just keeps running. But which one? In my case it was something called Safe Sleep (that prevents unsaved data from being lost if the power goes out). This is disabled by the following commands in a Terminal window: sudo pmset -a hibernatemode 0 sudo nvram "use-nvramrc?"=false Thank you MacFixer...
Resovling policy enabled objects with Unity 2.0
I had the opportunity to use Unity and Enterprise Libarary in my current project. On of the really cool features of Enterprise Library (and most Dependency Injection frameworks) is the support for Aspect Oriented Programming. It’s a really neat way of handling the cross-cutting concerns in your application. I was therefore very surprised when I had a really hard time to get, what I thought was simple, the following scenario to work: I want the objects that I resolve to be “policy enabled” – i.e. configured in such a way that I can add policies in the configuration that can be picked up later and applied to the resolved objects. That is, it was hard in Enterprise Library 4.1 and Unity 1.2. I had to scan the net and put together a solution of my own. It was a mix of extension methods, wrappers and some low-level enterprise library tweaking....
In My Current Project We Have Had
In my current project we have had a problem. The project is a “rewrite” project that shall “convert” a VB6 application into a VB.NET version of it. I put those words in quotes for a reason; here-in lies much of our problem in my mind. From the business-side of the project this has been viewed as technical problem and project. It’s a 1:1 conversion (the word “re-compile” has been used at more than one occasion). We all know that this is not the case. And even if it was that simple and you actually could do a 1:1 conversion it’s a waste of time. But that’s another story. In any case, we have had problem to get the business to engage in our project. (When I say business here it refers to people with the knowledge and power to decide on what the system should do). And that’s not the...
TF203007 Cannot create the label because the version controlled item […] already exists or has been specified more than once
OK – I just broke my old “longest blog post title” but this was a
problem we ran into today.
As I understand the message some kind of duplication has taken place,
but I don’t know what to do about it. Well I found this on a msdn-forum:
This error is cause by one of your developer was deleted file and
added exactly same file back in instead using undeleted feature, and
in the backend database, TFS give this file new file id which has
exactly same server path; therefore, when you are trying to label, it
throws an exception which complaining file already existed. To work
around this issue, you have to manually open label and remove […]
Then you should be able to label again.
OK. One of those - “That’s strange, but it works”. Thank you AndyPham.
Using ATDD in conversion project
I have been involved in a lot of conversion project. More specific it has been converting legacy VB6 applications to .NET applications. I’m not sure why or how but I have found myself in many project like this. Common scenarios in conversion project Very often these project has an ideal picture that “it’s just a conversion”. “This is 1 to 1 project” is a very common phrase in many of the projects I have been involved in. That can be understood as: “just convert it in the new language – with the exact same features”. I have even been asked to do bug conversion – that is to also convert any bugs I find into the new language. Moreover, these project very often lack interest, time and effort from the stakeholders/customers/business people. To non-technical persons conversion is purely technical thing. “Just recompile it – let me know when you’re done”....
WCF, MVVM and good client design
Up to now most of my assignments has not been client-related. Often the project description and main focus is on the layers beneath the GUI. But lately I have seen a shift in the industry and more so in my own interest. Client-side stuff is coming on strong. And it’s hard work to design a well structured client application. There are a lot of patterns but the frameworks and “recommended” ways up to now often doesn’t lend themselves well to those patterns. Ever tried to do proper MVC with WebForms or WinForms – it’s not easy. But that has also shifted. I have written a lot on ASP.NET MVC – that of course supports the mother of all client patterns, MVC, in a great way. So enough said there. But for “fat clients” such as windows clients there’s been a hazy mystery for me. I know OF WPF but I...
Configure WCF in IIS for anonymous access
This case may sound strange and I have seen loads of post that describes how to get out of this behavior. But we have a case where we want to allow anonymous access and the let a external component manage the security validation. This turned out to be very hard to figure out and required some wizard-like skills of Anders Granåker amongst others. OK – the case is very simple. I have a WCF Service that I want to allow anonymous access to. I don’t care about message and transport security (for now). Just allow anonymous access – I’ll take care of the authorization in code. Here is what I had to do to get it to work on Windows 2003 R2: Create a account on the server Put that account into the IIS_WPG group Create a virtual directory for my WCF service Create an application in that virtual directory...