Microservices Java Spring Boot Resilience4J Tutorial | Circuit Breaker Pattern | Spring Cloud

Microservices Java Spring Boot Resilience4J Tutorial | Circuit Breaker Pattern | Spring Cloud | Maven | pom.xml dependencies | Google Chrome Browser | IntelliJ IDEA editor
#microservices #resilience4j #springboot #springcloud #java #thinkconstructive #eshapuri #javaspringboot #softwaredeveloper #softwareengineer #softwareengineering #technology #json

Some key Spring Boot annotations which are discussed in the session are - @SpringBootApplication , @RestController , @RequestBody , @RequestMapping , @GetMapping, @CircuitBreaker
Data exchange format is JSON
In this tutorial, we will learn how to build resilient microservices for java spring boot services using spring cloud resilience4j. Here resilience4j and circuit breaker pattern is explained in detailed and then implemented for java spring boot microservices for GET REST API. During implementation, Maven dependencies are taken from spring initializr & included in User service, @CircuitBreaker is included and a fallback method is written. Later it is tested with multiple scenarios.

Some important points -
Resilience4J Spring Cloud Introduction -
Resilience4j is a lightweight fault tolerance library designed for functional programming.
Resilience4J is introduced in Spring Cloud as a replacement of Hystrix.
Hystrix is not supported in the latest Spring Cloud releases.

Resilience4J core modules -
Circuit Breaker : resilience4j-circuitbreaker
Retry : resilience4j-retry
Rate Limiter : resilience4j-ratelimiter
Bulkhead : resilience4j-bulkhead
Time Limiter : resilience4j-timelimiter
Cache : resilience4j-cache

Circuit breaker design pattern -
Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of one or more faults within some of its components.
Circuit Breaker identifies the services which are not running and will execute the available fallback method.
Core module : resilience4j-circuitbreaker

Microservices Playlist -
   • Microservices Tutorial with Java Spring Bo...  

GITHUB - Microservices Project -
https://github.com/thinkconstructive/...

Spring Boot How To Playlist -
   • Spring Boot REST API Complete Project  

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Good Books to spend your time with -
System Design Interview - By Alex Xu (Set Of 2 Books)
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The Psychology of Money - https://amzn.to/3laqMpw
Atomic Habits - https://amzn.to/3yEzGU5

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Chapters
00:00 Welcome Note
00:30 Agenda
00:56 Resilience4J Introduction : Spring Cloud
01:42 Resilience4J Core Modules : Spring Cloud
02:22 What is Circuit Breaker Pattern with example
04:37 Microservices example services
07:01 Circuit Breaker States explanation | What are the stages of circuit breaker?
09:37 Resilience4J Website Demonstration
10:08 Circuit Breaker example with Resilience4J Spring Cloud
11:32 pom.xml dependency | Maven dependency for Resilience4J , Actuator , AOP
13:58 application.yaml configuration and explanation
18:42 User Controller - CircuitBreaker and Fallback code
23:50 Testing Microservices success and failure scenarios with Resilience4J and Fallback
28:58 Summary
29:39 Thank You

Queries
how to make Microservices fault tolerant
circuit breaker microservices spring boot example
how to implement circuit breaker in spring boot microservices
how to include resilience4j maven dependency
Why circuit breaker is important in microservices?
Where do circuit breakers implement microservices?
What is a possible solution to achieve Circuit Breaker pattern in a microservice?
What is the difference between circuit breaker and hystrix?
What is the difference between fallback and circuit breaker?
What is hystrix circuit breaker in microservices?
What is hystrix replaced by?
What is Resilience4j used for?
What is Resilience4j in spring boot?
How does Resilience4j circuit breaker work?
What are the 3 states of Resilience4j circuit breaker?
Is Resilience4j open source?
What replaced hystrix?
What replaced hystrix in spring?
What is half open in Resilience4j?
How do you implement a Resilience4j circuit breaker?
What is circuit breaker in microservices?
how to implement circuit breaker using resilience4j in java spring boot
how to use spring initializer