Strangler Fig Pattern

The Strangler Fig Pattern is a software development strategy used for gradually migrating legacy systems to new architectures. Here’s a concise overview:

Origin

The pattern is named after the strangler fig, a vine that grows around trees, eventually replacing them.

Purpose

It’s used to incrementally replace an old system with a new one, piece by piece.

Process

• Start by building new functionality around the existing system
• Gradually migrate features from the old to the new system
• Eventually, the new system completely replaces the old one

Benefits

• Reduces risk compared to complete rewrites
• Allows for incremental updates and testing
• Maintains system functionality throughout the transition

Challenges

• Requires careful planning and coordination
• May involve temporary complexity during transition

This pattern is particularly useful for large, complex systems where a complete rewrite would be too risky or time-consuming.

References: Embracing the Strangler Fig pattern for legacy modernization