Martin Fowler has blogged about my Paper
Posted by andy in : Agile,Business Value,Refactoring on June 29, 2004. There are 3 responses »Martin Fowler has blogged the idea of a Strangler Application based the work Chris Stevenson and I presented in our An Agile Approach to A Lagacy System paper.
Here are some interesting comments about our approach:
… Much of my career has involved rewrites of critical systems. You would think such a thing as easy – just make the new one do what the old one did. Yet they are always much more complex than they seem, and overflowing with risk. The big cut-over date looms, the pressure is on. While new features (there are always new features) are liked, old stuff has to remain. Even old bugs often need to be added to the rewritten system.
An alternative route is to gradually create a new system around the edges of the old, letting it grow slowly over several years until the old system is strangled.
The most important reason to consider a strangler application over a cut-over rewrite is reduced risk. A strangler can give value steadily and the frequent releases allow you to monitor its progress more carefully…
3 Responses
Just re-read this great article, left me wondering if you’d thought of doing any follow ups?
@Colin: We’ve talked about it, but we haven’t got close to writing anything concrete. But you’re right, we should! Thanks for the nudge.
Good to hear. Given the amount of effort the industry spends on it I’m always amazed that so little has been written about rewriting/refactoring/wrapping/strangling legacy applications.