Entries Tagged 'Architecture' ↓

Enterprise applications and mobile applications have quite different requirements. Starting an enterprise application is just something you do once before it continue running for months or years. On the other side of the spectrum most mobile applications seldom runs for more than minutes, run by a bored users standing in line or riding the bus. [...]

Since I had plenty of time to read on my flights back and forth to OOPSLA, I managed to read through a few books. One of them was Adrenaline Junkies and Template Zombies by Tom DeMarco et al. Being the sceptic that I am, my attitude when starting to read this book was: “Yeah, I [...]

The second presentation from JavaZone 2009 that I want to comment on is “På tide å kaste ut relasjonsdataben?” (Is it time to throw out the relational database?) by Trond Arve Wasskog, which continues the current trend of looking at alternatives to relational databases for persistence.

For myself, I have for some time argued that most people seem to be using relational databases for four separate things: storing objects, querying them, reports, and backups. In my view it is only really good at the reporting part and literally suck at the rest. The object-relational impedance mismatch is a well-known issue, that DDD values are hard to implement using OR mappers also seems to be common knowledge, and that backups are not exactly efficient or easy to make is also an issue.

The JavaZone 2009 conference is over, and although I couldn’t make it this year due to our project, StreamFlow, going into production soon, the Qi was definitely flowing there. I’ve been watching the videos from the conference (available here, and many kudos for making them available so soon), and there’s a number of presentations which either explicitly or implicitly relates to Qi4j. It seems that so many of the issues that Qi4j has been designed to deal with are things that are becoming known and annoying to a majority of developers. So, I’ll try to outline below just how the topics covered at JavaZone relate to Qi4j, and how Qi4j can help you deal with those problems.

This is a long article to follow up my talk at SSWC, so I will start with a summary for the lazy reader
Summary
With connected devices, JavaScript enabled web sites and the extensibility of the XMPP protocol, we are at the beginning of a new kind of applications that are operating in the [...]

What do you do when your Spring configuration isn’t in charge of creating your objects that needs to be injected with stuff? This became a real problem for me when I tried doing some non-anemic domain object implementations persisted as Neo4j Nodes.
I was playing around with creating a Twitter clone, in my opinion the [...]

The megahertz race is over, and instead we get more execution cores. This means that we as developers must make our applications parallel, in order to take advantage of the new performance. The easiest way to be parallel is to execute tasks in new threads, something that is useful also for lengthy but not resource [...]

After a discussion about PowerMock with @olabini on Twitter I felt I had to write a post on testability.
The truth “Autonomous, re-runnable, code-based tests are objectivity good” has created a perceived truth, namely “Testable design is good design”. This assumption is incorrect.
The phrase “testable design” is dependent of two things; the design of the code [...]

NSArray and NSMutableArray have methods for sorting arrays, NSArray returns new sorted arrays and NSMutableArray can be sorted in place. The sort methods comes in three flavours; using a function, using a selector, or using an array of NSSortDescriptor objects.
NSArray admits to sorts being a slow operation, and adds a method pair for comultive sorts [...]

Many Java developers are looking at new dynamic languages, such as Groovy and JRuby, mostly because of the freedom and rapid development that a dynamic language allows. Some of my colleagues are also looking at Cocoa and feel daunted at the sight of Objective-C.
Here I will use a small example that is easy and [...]

Nishant wrote a good piece on why Apple continue to outdo it’s rivals, he used a variant of a quote by Canadian hockey player Wayne Gretzky to make his point:
A good hockey player plays where the puck is. A great hockey player plays where the puck is going to be.
This is true as it stands, [...]

I described in my previous post how you can change the class of a live object instance. The use-case was a workaround for bug in Cocoa Touch’s UIKit. What if I could fix the bug, instead of applying a work around in my sub-class?
Update: Buttons created with UIButtonTypeRoundedRect is a special case returning a private [...]