[Solved] Which of the following is the correct way to annotate a fallback method using Resilience4j's CircuitBreaker in a Spring Boot microservice? | Microservices

Microservices - Resilience Patterns

Which of the following is the correct way to annotate a fallback method using Resilience4j's CircuitBreaker in a Spring Boot microservice?

A@CircuitBreaker(name = "myService", fallbackMethod = "handleFallback") public String callService() { return serviceCall(); } public String handleFallback(Throwable t) { return "Fallback response"; }

B@CircuitBreaker(name = "myService") public String callService() { return serviceCall(); } public String handleFallback() { return "Fallback response"; }

C@Fallback(name = "myService", method = "handleFallback") public String callService() { return serviceCall(); }

D@Retry(name = "myService", fallbackMethod = "handleFallback") public String callService() { return serviceCall(); }

Step-by-Step Solution

Solution:

Step 1: Identify correct annotation usage
Resilience4j's CircuitBreaker supports specifying a fallback method with the fallbackMethod attribute.
Step 2: Check method signatures
The fallback method must accept the exception parameter (Throwable) to handle errors properly.
Step 3: Analyze options
@CircuitBreaker(name = "myService", fallbackMethod = "handleFallback") public String callService() { return serviceCall(); } public String handleFallback(Throwable t) { return "Fallback response"; } correctly uses @CircuitBreaker with fallbackMethod and matching method signatures. Options B, C, and D misuse annotations or omit required parameters.
Final Answer:
Option A -> Option A
Quick Check:
Resilience4j fallback requires fallbackMethod with Throwable param [OK]

Quick Trick: Fallback method needs Throwable parameter [OK]

Common Mistakes:

MISTAKES

Omitting fallbackMethod attribute
Not including Throwable parameter in fallback
Using incorrect annotations like @Fallback or @Retry

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More Microservices Quizzes

Which of the following is the correct way to annotate a fallback method using Resilience4j's CircuitBreaker in a Spring Boot microservice?

Step 1: Identify correct annotation usage

Step 2: Check method signatures

Step 3: Analyze options

Final Answer:

Quick Check:

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