Introduction to MSF4J 2.0

Afkham AzeezSenior Director, Platform Architecture, WSO2,Inc.@afkham_azeez http://me.afkham.org

What is MSF4J?

A lightweight, high performance framework for building microservices in Java

Vision for MSF4J• Lightweight & fast runtime

• Use Java annotations as a way of defining microservices APIs as

well as metrics

• Provide simple ways to develop & deploy microservices

• Built-in Metrics & Analytics APIs with out of the box integration with

WSO2 Data Analytics Server (DAS)

• To be used in the WSO2 platform as a way of replacing all admin

services as well as defining other microservices for inter-component

interactions3

MSF4J Implementation• Based on the new Carbon 5.0 kernel

• Transport is based on Netty 4.0

• Supports streaming

• High performance

• 9MB pack size

• Starts within 300ms

• Less than 25MB memory consumption for the framework

MSF4J- Performance Comparison

MSF4J- Memory Consumption Comparison

MSF4J- Latency Comparison

MSF4J– Thread Model

Download

o MSF4J 2.0.0 release is available athttps://github.com/wso2/msf4j/releases/tag/v2.0.0o Refer to the getting started guide in GitHubo A good place to start is the samples

Core Features (1/2)• Quick & simple development model using simple

annotations

• Supports Spring annotations & runtime

• Swagger support

• ExceptionMapper

• Form processing – FormParam, FormDataParam, FormIterator

• Custom interceptors10

Core Features (2/2)• JWT based security

• Metrics gathering & publishing

• Streaming input & streaming output support

• Circuit breaker support

• WSO2 DevStudio based tooling for generating microservices projects starting from a Swagger API definition

• Comprehensive samples demonstrating how to develop microservices application

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Getting Started• Start from Maven archetype• Start from Swagger definition

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Start from Maven Archetypemvn archetype:generate -DarchetypeGroupId=org.wso2.msf4j \-DarchetypeArtifactId=msf4j-microservice -DarchetypeVersion=2.0.0 \-DgroupId=org.example -DartifactId=Hello-Service -Dversion=1.0.0-SNAPSHOT \-Dpackage=org.example.service -DserviceClass=HelloService

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Start from Swagger Def

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Runner

Spring Support• Supports standard Spring configuration annotations

such as @Configuration, @Component, @AutoWired etc. and other Spring features work with MSF4J

• Bring in other 3rd party libraries & wire them in at runtime. • e.g. Spring-JPA library to integrate the Hibernate ORM

framework with an MSF4J service

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ExceptionMapper

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Circuit Breaker

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Swagger Annotations

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Swagger Definition • http://localhost:8080/swagger• http://localhost:8080/swagger?path=/stockquote

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Request Streaming

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Response Streaming

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Form Processing• @FormParam• @FormDataParam• FormParamIterator

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Security

• Security is done via a central server issuing JWT tokens

• The JWTSecurityInterceptor verifies the signature, expiry & claims in the token

Analytics & Monitoring

• Supports annotations• Timed – measures execution time

• Metered – measures rate of events

• Counted – Counts the total invocations

• HTTPMonitored – monitors HTTP requests

Analytics & Monitoring

Metrics Output to Console

JMX Metrics

Analytics & Monitoring

MSF4J Pet store sample

MSF4J Pet store sample

CONTACT US !http://wso2.com