Microservices Frameworks

 <<Under Construction>>

This post attempts to cover the most popular existing Microservices Frameworks. Well, there are few characteristics you need to think over while choosing MS frameworks:

• Support for RESTful services
• Support for Container-Based
• Support for Better Security
• Support for Better Observability - You can check here - https://arunmanglick-ms.blogspot.com/2021/01/microservices-designing-concepts.html

Few Frameworks:

1. Netflix OSS (Open S/w Solution)
2. Spring Boot
3. Istio
4. Dropwizard
5. Vert.x
6. Lagom

1). Netflix OSS 

This is a framework + library that is used to build microservices architecture.

Below are key essentials to architect microservices:

This framework provides all the essentials required to build microservices.

#	Requirements	Component	Comments
1	Service Registration & Discovery	Eureka Server & Client	Each microservice should register itself by providing - Host, NodeName, Service Metadata etc.
2	Latency & Fault Tolerance Library	Hystrix	Hystrix behaves like a Circuit Breaker. For e.g. if A ->B ->C->D and assume D breaks then C should not cascade failure to B.  By having Hstrix at 'C 'microservice, failures are not cascaded.
3	Gateway API, Routing, Filtering	Zuul	Supports Dynamic Routing, Resiliency, Security and Monitoring
4	Monitoring	Hystrix Dashboard
5	Client-Side Load Balancer	Ribbon	Ribbon - IPC (Inter Process Communication) Library. Uses RoundRobinRule, AvailabilityFiteringRule, WeightedResponseTimeRule Algorithm. Ribbon - Also helps to determine if servers are up and running.
6	Declarative REST Client	Feign	This helps to create a stub to call microservice without writing full set of code. Annotate the interface with  @FeignClient
7	NA	NA	NA
8	NA	NA	NA
9	NA	NA	NA

Best Explained here - Youtube

Note: Almost every Microservice, has Ribbon, Hystrix, and Feign.

2). Spring Boot & Spring Cloud:

Most popular Microservices development framework for Java Developers. Spring Cloud came after Boot and both together provide a great development environment.

Importantly, Spring Cloud provides Netflix OSS integrations for Spring Boot apps - Includes Discovery with Eureka, Circuit Breaker with Hystrix, Routing and API Gateway with Zuul and Client-Side Loadbalancing with Ribbon.

Best explained here - Youtube

Rest Frameworks - Not covered here. :) 

Hope this helps.

Arun Manglick