InfoQ Homepage Legacy Code Content on InfoQ
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Eight Quick Ways to Improve Java Legacy Systems
Even Java systems can be "legacy" systems. This article explores 8 quick and relatively low risk ways to improve even the crustiest Java application. Applications that may have previously been written off as dead can find new life by using these tips to improve performance, reduce operations overhead and grease the gears of the development lifecycle.
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Staying Safe and Sound Thanks to MDSD
In this article, Andreas Kaltenbach explains how Model-Driven Software Development (MSDS) can help solving backward compatibility problems when creating a newer version of a software which can mean a new API or a new database schema that old clients cannot use. MSDS is used to negotiate the differences between versions to ease the upgrading process.
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Using Logging Seams for Legacy Code Unit Testing
Using logging seams you can easily create unobtrusive unit tests around legacy classes, without needing to edit class logic as well as avoiding behavior changes.
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Dealing with Legacy Code
Here's a three-pronged attack to use on the legacy code that everyone eventually inherits: Build, Automate, Test. Use this BAT to create a safety net to ensure your code continues to work the way you want it to. Richardson shows how this helps quickly identify and eliminate unintended side effects. See how your day-to-day work compares, and see if you need to approach your work differently.