Explain the Strangler Fig pattern
WHAT IT TESTS: incremental modernization strategy. OUTLINE: a facade routes traffic, new services gradually replace legacy features one slice at a time, and the old system is retired when fully strangled.
WHAT IT TESTS: whether you can modernize a legacy system safely without a big-bang rewrite. ANSWER OUTLINE: place a facade or proxy in front of the monolith; incrementally build new services that replace specific features, routing those requests to the new code while everything else still hits the legacy system; expand coverage slice by slice until the monolith is fully strangled and retired. PREREQUISITES: a clean interception point for routing, ability to carve out bounded features, and shared or synchronized data access during coexistence.
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- #legacy-modernization
- #migration
- #microservices
- #architecture
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