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GETTING UNSTUCK: WORKING WITH LEGACY CODE AND DATA Cory Foy – http://www.cornetdesign.com
Goals ,[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Code
Legacy Code ,[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Code ,[object Object]
Legacy Code ,[object Object]
Legacy Code ,[object Object]
How do we change Legacy Code? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Adding a feature / Fixing a bug ,[object Object],[object Object],[object Object],[object Object],[object Object]
Improving the Design ,[object Object],[object Object],[object Object],[object Object]
Optimizing Resource Usage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Edit and Pray ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cover and Modify ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Feather’s Legacy Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object]
Patterns for the Change Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DEMO: Change Algorithm at Work ,[object Object]
Legacy Code isn’t just Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Code isn’t just Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Data ,[object Object],[object Object],[object Object],[object Object],[object Object]
Data Quality ,[object Object],http://www.agiledata.org/essays/legacyDatabases.html#DataProblems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Architecture Problems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Design Problems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Design Problems ,[object Object],[object Object],[object Object],[object Object],[object Object]
Design Problems ,[object Object],[object Object],[object Object],[object Object]
Design Problems ,[object Object],[object Object],[object Object]
Working with Legacy Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Working with Legacy Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Working with Legacy Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Process Problems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Refactoring Databases ,[object Object],[object Object],[object Object],[object Object]
Refactoring Databases
Refactoring Databases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Next Steps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Next Steps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Getting Unstuck: Working with Legacy Code and Data

  • 1. GETTING UNSTUCK: WORKING WITH LEGACY CODE AND DATA Cory Foy – http://www.cornetdesign.com
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