[Solved] You need to design an API Gateway pattern that aggregates data from user-service and order-service to provide a single response for a client request to... Which pattern best fits this requirement? | Rest API

Rest API - Advanced Patterns

You need to design an API Gateway pattern that aggregates data from user-service and order-service to provide a single response for a client request to /user-orders/{userId}. Which pattern best fits this requirement?

ARate limiting pattern to restrict client requests

BSimple proxy pattern forwarding requests directly to one service

CBackend for Frontend (BFF) pattern to combine multiple service responses

DCircuit breaker pattern to handle service failures

Step-by-Step Solution

Solution:

Step 1: Identify the need for data aggregation
The client wants combined data from two services in one response, which requires aggregation logic.
Step 2: Match pattern to requirement
The Backend for Frontend (BFF) pattern is designed to aggregate and tailor responses for specific client needs by calling multiple backend services.
Final Answer:
Backend for Frontend (BFF) pattern to combine multiple service responses -> Option C
Quick Check:
Data aggregation needs BFF pattern [OK]

Quick Trick: Aggregate multiple services with Backend for Frontend pattern [OK]

Common Mistakes:

MISTAKES

Choosing simple proxy which doesn't aggregate
Confusing rate limiting with aggregation
Using circuit breaker which handles failures, not aggregation

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Which pattern best fits this requirement?

Step 1: Identify the need for data aggregation

Step 2: Match pattern to requirement

Final Answer:

Quick Check:

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