On Thursday, February 21, I attended New York XP & Agile and presented Strangle Your Legacy Code. As a mob, we practiced adding features to an old SMTP server without modifying its code.

Abstract:

Given an ancient codebase that makes refactoring risky and expensive, how do you clear a path to continued delivery? The old wisdom says the best time to plant a tree was 20 years ago, and the next best time is today. But if you already have a gnarled old source tree, preserve your software investment by planting a Strangler: a pattern for reaping continuous value from your existing system while growing new functionality alongside it.

We’ll take a quick look at a Strangler, demonstrate the basics of Mob Programming, then split into small groups to test-drive new features into the system. You’ll leave with a powerful strategy for extending the useful life of working, valuable software — especially when it’s hard to change — and with a free bonus development practice to accelerate your team’s learning. For a limited time only!

• Slides

Wondering what this interactive, participatory session was like? Take a look at Derek Graham’s writeup from last summer.