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

[@ProgrammingTechie]

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

[@karmabender]

awesome brother please keep creating such videos

[@rishiraj2548]

Resilience4j is a lightweight fault tolerance library inspired by Netflix Hystrix, but designed for functional programming. Resilience4j provides higher-order functions (decorators) to enhance any functional interface, lambda expression or method reference with a Circuit Breaker, Rate Limiter, Retry or Bulkhead. You can stack more than one decorator on any functional interface, lambda expression or method reference. The advantage is that you have the choice to select the decorators you need and nothing else.

[@prasanthsanjeevi2563]

Finally!!! Tons of thanks

[@jeniferjayaraj7834]

Hi Sai. Thanks for the course. Fallback method is not getting called in my InventoryClient. After adding spring starter AOP dependencies only it works. JFYR

[@AmitDobal]

HI Sai, in earlier video you have used the Feign client. But in this video the implementation is of RestClient

[@spandanbhol6049]

Hi. Yes, but in the video of Part 8 (the one before this vid) he has refactored the code to use Rest Client.

[@manaspurohit3123]

What is the point of configuring circuit breaker in order-service. As you haven't shown practical use of it, I am little confused, can you please tell me that? Like I want to see circuit breaker is open or not in the case when order-service calls stopped inventory-service.

[@nawwintphyu1873]

Thank you so much!

[@islamahmed3270]

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

[@hacisimsek2543]

Thank you for everything! Could you please share your theme?

[@ProgrammingTechie]

It's gradianto

[@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.

[@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

[@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 ??

[@AkshatMehra-l4b]

i too thought about that.

[@e11y1985]

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

[@AmitDobal]

Through service discovery

[@rishiraj2548]

Good evening

[@Krishnadevaraya1]

Please upload videos speedly

[@karmabender]

You haven't used service registry

[@aadiraj6126]

Sai, No doubt your video contains quality but if you want real deal in KZbin, 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 😅

[@prasanthsanjeevi2563]

Please release next video

[@ProgrammingTechie]

Video will be out on Saturday

[@prasanthsanjeevi2563]

@@ProgrammingTechie thanks so much

[@prasanthsanjeevi2563]

​@@ProgrammingTechie video please