Intermediate LevelSoftware Engineering Principles
How do you decompose a Monolith into Microservices using Domain-Driven Design Bounded Contexts?
❓ Interview Prompt: Explain Monolith decomposition strategies, identifying business domain boundaries, mapping Bounded Contexts to microservices, and data decoupling.
Decomposing a monolithic codebase into microservices requires strategic boundary selection:
Decomposition Methodology:
1
Identify DDD Bounded Contexts: Analyze business domain capability boundaries (e.g. Billing, Inventory, Shipping).
2
Decouple Data Schema First: Separate database tables so each proposed microservice owns its data store exclusively.
3
Extract Interfaces: Wrap module interfaces in internal APIs before splitting into independent deployment artifacts.
Code Implementation Example
json
{
"monolithDecomposition": {
"boundedContext": "BillingDomain",
"extractedMicroservice": "billing-service",
"ownedDatabase": "billing_db_postgres",
"communicationProtocol": "gRPC / Async Events"
}
}💡Mapping Bounded Contexts to decomposed microservice architectures.
🎯 Interview Key Takeaway
Decompose monoliths along DDD Bounded Context boundaries to create cohesive microservices with independent data ownership.
#Microservices#Decomposition#DDD#Intermediate
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