Spring Boot Microservices Tutorial - Part 9 - Circuit Breaker with Resilience4J

In this Spring Boot 3 Microservices tutorial series, we will learn how to build microservices using Spring Boot and Spring Cloud.
This is part 9 of the series, in this part, we will cover:
- What is Circuit Breaker Pattern ?
- Why to use Circuit Breaker ?
- How to implement Circuit Breaker pattern using Resilience4J and Spring Cloud Circuit Breaker
- Implement Circuit Breaker Pattern in API Gateway and Order Service
- Learn how to implement Timeout and Retry patterns

[@ProgrammingTechie]

Link to the written tutorial: programmingtechie.com/2024/05/26/spring-boot-microservices-tutorial-part-6/

[@prasanthsanjeevi2563]

Finally!!! Tons of thanks

[@islamahmed3270]

can you make a video about integerating service discovery with gateway mvc ?

[@sairajnaikdhure1112]

My all services are UP but then also fallback is getting called. I just created separate RestControllers for all service fallbacks and I also passing their URI correctly.
Any solution?
My Application.yml configurations for resilience4j :
# Actuator endpoints
management:
health:
circuitbreakers:
enabled: true
endpoints:
web:
exposure:
include:
- "*"
endpoint:
health:
show-details: always
# Resilinece4j Properties
resilience4j:
circuitbreaker:
configs:
default:
registerHealthIndicator: true
slidingWindowType: COUNT_BASED
slidingWindowSize: 10
failureRateThreshold: 50
waitDurationInOpenState: 5s
permittedNumberOfCallsInHalfOpenState: 3
automaticTransitionFromOpenToHalfOpenEnabled: true
minimumNumberOfCalls: 5
timelimiter:
configs:
default:
timeoutDuration: 3s
retry:
configs:
default:
maxAttempts: 3
waitDuration: 2s

[@Krishnadevaraya1]

Please upload videos speedly

[@aadiraj6126]

Sai, No doubt your video contains quality but if you want real deal in CZcams, Pls add angular as frontend as well. May be it attracts masses due to output are visible in screen, or may be demand of full stack is on high. And videos are coming too late to adhere.. speed up buddy. I know you're working fellow & editing takes time, but you've potential to become one of the top project based youtuber.

[@aadiraj6126]

I see it as missed opportunity, only if I'd that much talent like yours 😅

[@rishiraj2548]

Good evening

[@e11y1985]

Let say I run more than one product services. How the gateway knows how many product services are actually available?

[@rishiraj2548]

21:05
Either of the two should be sufficient (logically thinking), I guess:
resilience4j.circuitbreaker.configs.default.failureRateThreshold=50
resilience4j.circuitbreaker.configs.default.minimum-number-of-calls=5
Then why the circuit breaker configuration requires these both to be specified along with:
resilience4j.circuitbreaker.configs.default.slidingWindowSize=10
I mean:
What would be the behaviour of the setup when:
minimum-number-of-calls=6,
failureRateThreshold=40, and
slidingWindowSize=10
??

[@user-sz1rm7bj7r]

i too thought about that.

[@prasanthsanjeevi2563]

Please release next video

[@ProgrammingTechie]

Video will be out on Saturday

[@prasanthsanjeevi2563]

@@ProgrammingTechie thanks so much

[@prasanthsanjeevi2563]

​@@ProgrammingTechie video please

[@liwen7252]

One question, please? Do we still need this Circuit Breaker if we already have service discovery? thanks.

[@ProgrammingTechie]

They are 2 different patterns, not related

[@liwen7252]

@@ProgrammingTechie Thank you.