There is great power in being able to manipulate collective things as one single thing. It gives you simplicity, hence control. You can focus your attention on it and reason about it, even though behind the hood it is made of many parts. The composite thing is kept simple, therefore you can also deal with [...]
Patterns express intents
sept 6th, 2009
Patterns represent a couple (intent, solution); sometime they refer to a solution, more often they essentially represents an intent, independently of its solution. Sometimes the solution part of patterns includes a trick or a workaround to overcome the limits of a language, but patterns cannot be reduced to that trick. Indeed, a very important role [...]
Formal definitions of architecture
sept 5th, 2009
Sounds like a challenge: a paper is proposing an approach for a formal definition of architecture, design, and implementation, among other things. The link was offered and commented on a post from Ralph Johnson, that everyone knows for being one of the four in the « Gang of Four ». Though I have not tried to fully understand [...]
Patterns as another kind of types
sept 3rd, 2009
Patterns represent a couple (intent, solution), where the intent matters most. Based on that intents, that can be generic or specialized, I propose to consider patterns like types in languages with strong typing, for the compiler to enforce their constraints. Declaring patterns: what for? Consider the very simple Quantity pattern from Analysis Patterns (Fowler): Represent [...]
Toward smarter dependency constraints (patterns to the rescue)
août 30th, 2009
Low coupling between objects is a key principle to help you win the battle against software entropy. Making sure your dependencies are under control matters. Several tools can enforce dependencies restrictions, such as JDepend. However in a real project with many classes, packages and modules, the real issue is how to decide and configure the [...]
After Technical Debt, technical Options
août 10th, 2009
In finance, options are powerful tools for traders, and many design practices including design patterns can be seen as options. Options can -perhaps- yield a great benefit for a certain and immediate cost. If this cost is cheap enough it can be quite attractive. An option to buy a stock is a right to buy [...]
The more patterns developers know, the most efficient they become within a team: it only takes one or two words (the pattern name) to communicate a design decision or proposal, instead of 10 mn of explanations. Communication also gets much more accurate and to-the-point (or less fuzzy). Because patterns often form a pattern language, not [...]
Composite patterns, such a the Bureaucracy pattern, are patterns built by the composition of other « smaller » patterns. However even usual design patterns can be considered composite patterns made of smaller subpatterns. The goal is therefore to find out which are the main subpatterns that enable to reconstruct as many design patterns as possible. The subpatterns [...]
Patternity is back!
sept 27th, 2008
After my initial attempt at doing something useful and automated around design patterns, I started working again on a brand new version of a pattern-aware tool: Patternity. No more code generation, the focus is now on the generation of documentation artifacts (UML class and sequence diagrams, reports, enhanced Javadoc…) from the source code annotated with [...]
Documenting the design of software using patterns?
jan 15th, 2008
I have experimented an approach that considers every design pattern as the recursive composition of smaller patterns. This led to a prototype tool to illustrate its benefits by generating design-level documentation of annotated source code. Eat your own dog food The source code of this tool itself was used as the code base to apply [...]
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All original material of whatever nature created by Cyrille Martraire and included in this weblog and any related page, including the weblog's archive, is licensed under a Creative Commons License.
