Building modular apps using Spring
When looking at most of the sample applications and code examples for Spring framework it may seem that everything should be defined as a bean. However, if we want to achieve nicely modular design then we should try to do the exact opposite - have each module expose as little …
Read moreIllusion of Reuse
I have quite often seen situation where trying to achieve more reuse actually ends up in building the Big Ball of Mud. In some cases it is the Enterprise Domain Model that Eric Evans warns us against. Other places which are especially susceptible to this are Transaction Scripts and other …
Read more5 Tips for Getting More Out of Your Unit Tests
State of Application Design In vast majority of applications I have seen the domain logic is implemented using a set of Service classes (Transaction Scripts). Majority of these are based on the DB structure. Entities are typically quite thin DTOs that have little or no logic. The main benefit of …
Read moreWhy Over-Reusing is Bad
One of the Holy Grails of software development has always been reuse. In the following post I want to focus on reuse of application logic in its different forms. I will not cover reuse on more abstract levels like ideas or patterns. This will be a two part series where …
Read moreRebuilding software is inevitable
No matter how good the initial design is it will start degrading once it's out there. Software design seems to follow the 2nd law of thermodynamics - in a software system the amount of entropy tends to increase over time. The moment something is released new requirements will start bombarding …
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