Microsoft Enterprise Library 5.0

It shipped! Here it is.

Here’s what’s new:

This major release of Enterprise Library contains many compelling new features and updates that will make developers more productive. There are no new blocks; instead the team focused on making the existing blocks shine, on testability, maintainability and learnability. The new features include:

• Major architectural refactoring that provides improved testability and maintainability through full support of the dependency injection style of development
• Dependency injection container independence (Unity ships with Enterprise Library, but you can replace Unity with a container of your choice)
• Programmatic configuration support, including a fluent configuration interface and an XSD schema to enable IntelliSense
• Redesign of the configuration tool to provide:
  • A more usable and intuitive look and feel
  • Extensibility improvements through meta-data driven configuration visualizations that replace the requirement to write design time code
  • A wizard framework that can help to simplify complex configuration tasks
• Data accessors for more intuitive processing of data query results
• Asynchronous data access support
• Honoring validation attributes between Validation Application Block attributes and DataAnnotations
• Integration with Windows Presentation Foundation (WPF) validation mechanisms
• Support for complex configuration scenarios, including additive merge from multiple configuration sources and hierarchical merge
• Optimized cache scavenging
• Better performance when logging
• Support for the .NET 4.0 Framework and integration with Microsoft Visual Studio 2010
• Improvements to Unity
• A reduction of the number of assemblies

How to simply starve your windows forms app

I was rewriting on .NET 4 some of our internal benchmarking tools (ok, a cooler way to say I wrote a small utility to stress our components on high concurrent environments…), when I’ve deadlocked the… application itselfe!

Here’s what I’ve done:

            var tasks = Enumerable.Range(1, (int)numericUpDownNumberOfThreads.Value).Select(
                i =>
                {
                    var task = new Task(
                        () =>
                        {
                            Invoke(LogMessageDelegate, ">> I'm in:  " + i);
                            Thread.Sleep(new Random().Next(1000));
                            Invoke(LogMessageDelegate, "<< Bye bye: " + i);
                        }
                    );
                    task.Start();

                    return task;
                }
            ).ToArray();

            Invoke(this.LogMessageDelegate, ">> WaitAll");
            Task.WaitAll(tasks);
            Invoke(this.LogMessageDelegate, "<< WaitAll");

The way the Invoke method works is quite simply by sending a message to the correct thread, and if there is no message pumping no one will process the message. The solution was evolving on yet another thread:

            new Task(
                () =>
                {
                    var tasks = Enumerable.Range(1, (int)numericUpDownNumberOfThreads.Value).Select(
                        i =>
                        {
                            var task = new Task(
                                () =>
                                {
                                    Invoke(LogMessageDelegate, ">> I'm in:  " + i);
                                    Thread.Sleep(new Random().Next(1000));
                                    Invoke(LogMessageDelegate, "<< Bye bye: " + i);
                                }
                            );
                            task.Start();

                            return task;
                        }
                    ).ToArray();

                    Invoke(this.LogMessageDelegate, ">> WaitAll");
                    Task.WaitAll(tasks);
                    Invoke(this.LogMessageDelegate, "<< WaitAll");
                }
            ).Start();

Reviewing a slow web application page

Once in a while I’m get called to help figuring out why are are our application running slow.

Though in the majority of cases we end up on the some tier – the database, sometime we get some surprises. This was one of this cases.

I started following a 8 seconds search page. The application had little or no instrumentation, so all I started with IIS logs:

• 1 call to OurSearchFunction.aspx: 8 s
• Abount 10 consecutive calls to a local GiveMeSomeRowDataWebService.asmx: totaling about 7 s

Uhm… strange, isn’t it? Looking at the code, I’ve found a datagrid that was calling a WebService for each produced row !As we only needed to get the information when the user followed a link on the grid, we move it to the corresponding event, saving around 90% on wasteful calls.

3rd General Assembly of RACE networkRFID

The 3rd General Assembly of RACE networkRFID was held at the new Frankfurt University campus on March 25th, 2010.

My company, Link, is an associated member of RACE networkRFID, a network designed to become a federating platform to the benefit of all European Stakeholders in the development, adoption and usage of RFID.

About the meeting itself you can follow the announcement at the public site. For now I’d like to make a reference to the RACE database of RFID use cases. The result of WP3, the RACE database of RFID use cases is now on-line and accessible to the members, who are strongly encouraged to connect and enter their use cases. We will soon start submitting some of the RFID we are working on, and I encourage all the readers to do the same. It’s free!

It was a great opportunity to share our experience and expectations over RFID, and above all to share the next generation of projects we are working on. In this respect I’ve had the opportunity to present to some of members our investment on rfrbNET project, a Track & Trace Federated Network. rfrbNet is co-financed by QREN (National Strategic Reference Framework), the framing for the application of the Community’s policy for economic and social cohesion in Portugal.

These meetings give us an opportunity to do some networking among the participants - I was naturally particularly interested on promoting rfrbNet.

And here we are:

Here are some photos of our host, the new Frankfurt University campus:

Finally I had an opportunity to do a little sightseeing on Frankfurt. It’s a quite city with a curious blend of history and modernity. Here’s a dramatic (probably over photoshoped…) photo:

New <%: %>Code Nugget Syntax

Tired of writing <%= Server.HtmlEncode(Model.MyString) %>? Here’s the new ASP.NET 4 way:

<%: Model.MyString %>

C programming language back at the top

According to the TIOBE index C programming language back at number 1 position. It’s no surprise that Java is loosing pace to other JVM languages. But that C is gaining traction? Uauu, I didn’t expect this…

Also worth mentioning is Apples’s Objective-C raise. And Go (go figure :)

Here Abril’s 2010 index:

Position Apr 2010	Position Apr 2009	Delta in Position	Programming Language	Ratings Apr 2010	Delta Apr 2009	Status
1	2		C	18.058%	+2.59%	A
2	1		Java	18.051%	-1.29%	A
3	3		C++	9.707%	-1.03%	A
4	4		PHP	9.662%	-0.23%	A
5	5		(Visual) Basic	6.392%	-2.70%	A
6	7		C#	4.435%	+0.38%	A
7	6		Python	4.205%	-1.88%	A
8	9		Perl	3.553%	+0.09%	A
9	11		Delphi	2.715%	+0.44%	A
10	8		JavaScript	2.469%	-1.21%	A
11	42		Objective-C	2.288%	+2.15%	A
12	10		Ruby	2.221%	-0.35%	A
13	14		SAS	0.717%	-0.07%	A
14	12		PL/SQL	0.710%	-0.38%	A
15	-		Go	0.710%	+0.71%	A
16	15		Pascal	0.648%	-0.07%	B
17	17		ABAP	0.625%	-0.03%	B
18	20		MATLAB	0.616%	+0.13%	B
19	22		ActionScript	0.545%	+0.09%	B
20	19		Lua	0.521%	+0.03%	B

Here’s my 2008’s post about the index.