chore: Add API Circuit Breaker to API documentation #2683
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chronark
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perkinsjr,
MichaelUnkey and
mcstepp
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📝 WalkthroughWalkthroughA new file named Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant API Gateway
participant Service A
participant Circuit Breaker
Client->>API Gateway: Request
API Gateway->>Circuit Breaker: Check Health
alt Circuit Closed
Circuit Breaker->>Service A: Forward Request
Service A-->>Circuit Breaker: Response
Circuit Breaker-->>API Gateway: Response
API Gateway-->>Client: Response
else Circuit Open
Circuit Breaker-->>API Gateway: Block Request
API Gateway-->>Client: Fallback Response
end
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (3)
apps/www/content/glossary/api-circuit-breaker.mdx (3)
101-113: Add Redis configuration and rate limit exceeded handlingThe rate limiting example should include:
- Redis connection configuration
- Rate limit exceeded response configuration
- Error handling
Consider adding these additional configuration details:
spring: cloud: gateway: redis: host: localhost port: 6379 routes: - id: example_route uri: http://example.com filters: - name: RequestRateLimiter args: redis-rate-limiter.replenishRate: 10 redis-rate-limiter.burstCapacity: 20 key-resolver: "#{@userKeyResolver}" predicates: - Path=/api/** default-filters: - name: RequestRateLimiter args: status-code: 429 error-message: "Too Many Requests"
62-69: Enhance best practices with metrics and alerting recommendationsConsider adding these important best practices:
- Metrics Collection: Implement detailed metrics collection (success rate, response times, circuit state changes)
- Alerting Strategy: Set up alerts for circuit breaker state changes and failure rate thresholds
- Circuit Breaker Groups: Group related services under shared circuit breaker configurations
117-119: Consider adding sections on troubleshooting and library comparisonThe document would benefit from additional sections:
Common Pitfalls and Troubleshooting
- Common configuration mistakes
- Debugging circuit breaker behavior
- Performance impact considerations
Circuit Breaker Library Comparison
- Resilience4j vs Hystrix
- Performance characteristics
- Feature comparison
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apps/www/content/glossary/api-circuit-breaker.mdx
[uncategorized] ~115-~115: If this is a compound adjective that modifies the following noun, use a hyphen.
Context: ...of 20 requests, using Redis to maintain rate limiting counters. ## Conclusion In summary, A...
(EN_COMPOUND_ADJECTIVE_INTERNAL)
| - url: https://example.com/best-practices-circuit-breaker | ||
| title: Best Practices for Implementing Circuit Breaker Pattern in Microservices | ||
| - url: https://example.com/spring-cloud-circuit-breaker | ||
| title: "Micro Service Patterns: Best Practices for implementing Circuit Breaker with Spring Cloud" | ||
| - url: https://example.com/integration-applications-circuit-breaker | ||
| title: Circuit Breaker Pattern in Integration Applications |
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Replace example.com URLs with actual documentation links
The recommended reading section contains placeholder URLs (example.com). These should be replaced with actual documentation links to provide real value to readers.
Consider linking to:
- Official Spring Cloud Circuit Breaker documentation
- Resilience4j documentation
- Microsoft's/Netflix's circuit breaker pattern documentation
| For Spring Boot developers, implementing a circuit breaker is straightforward using the `resilience4j` library. Below is a practical example of how to integrate a circuit breaker with a RESTful service: | ||
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| ```java | ||
| import org.springframework.web.bind.annotation.GetMapping; | ||
| import org.springframework.web.bind.annotation.RestController; | ||
| import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker; | ||
|
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| @RestController | ||
| public class ExampleController { | ||
|
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| @GetMapping("/example") | ||
| @CircuitBreaker | ||
| public String exampleEndpoint() { | ||
| // Call to external service | ||
| return "Success Response"; | ||
| } | ||
| } | ||
| ``` |
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🛠️ Refactor suggestion
Enhance the Spring Boot example with complete configuration
The current example is oversimplified and missing crucial elements:
- Circuit breaker configuration (failure threshold, timeout, etc.)
- Fallback method
- Error handling
Consider enhancing the example:
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker;
+import io.github.resilience4j.core.registry.EntryAddedEvent;
+import io.github.resilience4j.core.registry.EntryRemovedEvent;
+import io.github.resilience4j.core.registry.EntryReplacedEvent;
+import io.github.resilience4j.core.registry.RegistryEventConsumer;
+@Configuration
+public class CircuitBreakerConfiguration {
+ @Bean
+ public CircuitBreakerConfig circuitBreakerConfig() {
+ return CircuitBreakerConfig.custom()
+ .failureRateThreshold(50)
+ .waitDurationInOpenState(Duration.ofMillis(1000))
+ .slidingWindowSize(2)
+ .build();
+ }
+}
@RestController
public class ExampleController {
@GetMapping("/example")
- @CircuitBreaker
+ @CircuitBreaker(name = "exampleBreaker", fallbackMethod = "fallbackMethod")
public String exampleEndpoint() {
// Call to external service
return "Success Response";
}
+
+ public String fallbackMethod(Exception ex) {
+ return "Fallback Response";
+ }
}📝 Committable suggestion
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| For Spring Boot developers, implementing a circuit breaker is straightforward using the `resilience4j` library. Below is a practical example of how to integrate a circuit breaker with a RESTful service: | |
| ```java | |
| import org.springframework.web.bind.annotation.GetMapping; | |
| import org.springframework.web.bind.annotation.RestController; | |
| import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker; | |
| @RestController | |
| public class ExampleController { | |
| @GetMapping("/example") | |
| @CircuitBreaker | |
| public String exampleEndpoint() { | |
| // Call to external service | |
| return "Success Response"; | |
| } | |
| } | |
| ``` | |
| For Spring Boot developers, implementing a circuit breaker is straightforward using the `resilience4j` library. Below is a practical example of how to integrate a circuit breaker with a RESTful service: | |
| ```java | |
| import org.springframework.web.bind.annotation.GetMapping; | |
| import org.springframework.web.bind.annotation.RestController; | |
| import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker; | |
| import io.github.resilience4j.core.registry.EntryAddedEvent; | |
| import io.github.resilience4j.core.registry.EntryRemovedEvent; | |
| import io.github.resilience4j.core.registry.EntryReplacedEvent; | |
| import io.github.resilience4j.core.registry.RegistryEventConsumer; | |
| @Configuration | |
| public class CircuitBreakerConfiguration { | |
| @Bean | |
| public CircuitBreakerConfig circuitBreakerConfig() { | |
| return CircuitBreakerConfig.custom() | |
| .failureRateThreshold(50) | |
| .waitDurationInOpenState(Duration.ofMillis(1000)) | |
| .slidingWindowSize(2) | |
| .build(); | |
| } | |
| } | |
| @RestController | |
| public class ExampleController { | |
| @GetMapping("/example") | |
| @CircuitBreaker(name = "exampleBreaker", fallbackMethod = "fallbackMethod") | |
| public String exampleEndpoint() { | |
| // Call to external service | |
| return "Success Response"; | |
| } | |
| public String fallbackMethod(Exception ex) { | |
| return "Fallback Response"; | |
| } | |
| } | |
| ``` |
|
Thank you for following the naming conventions for pull request titles! 🙏 |
This PR adds the API Circuit Breaker.mdx file to the API documentation.
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