MSF4J 2.0 is a lightweight, high-performance framework for building microservices in Java, featuring a quick development model with Java annotations, built-in metrics, and analytics capabilities. The framework is based on the new Carbon 5.0 kernel and supports low memory consumption and fast startup times. Users can get started with MSF4J using Maven archetypes or Swagger definitions, and it includes features such as JWT-based security and support for streaming input/output.

1. Introduction to MSF4J 2.0
Afkham Azeez
Senior Director, Platform Architecture, WSO2,Inc.
@afkham_azeez http://me.afkham.org

2. What is MSF4J?
A lightweight, high performance
framework for building microservices in
Java

3. 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 interactions
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4. 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

5. MSF4J- Performance Comparison

6. MSF4J- Memory Consumption Comparison

7. MSF4J- Latency Comparison

8. MSF4J– Thread Model

9. Download
o MSF4J 2.0.0 release is available at
https://github.com/wso2/msf4j/releases/tag/v
2.0.0
o Refer to the getting started guide in GitHub
o A good place to start is the samples

10. Core Features (1/2)
• Quick & simple development model using simple
annotations
• Supports Spring annotations & runtime
• Swagger support
• ExceptionMapper
• Form processing – FormParam, FormDataParam,
FormIterator
• Custom interceptors
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11. 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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12. Getting Started
• Start from Maven archetype
• Start from Swagger definition
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13. Start from Maven Archetype
mvn 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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14. Start from Swagger Def
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16. Runner

17. 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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18. ExceptionMapper
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19. Circuit Breaker
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20. Swagger Annotations
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21. Swagger Definition
• http://localhost:8080/swagger
• http://localhost:8080/swagger?path=/stockquote
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22. Request Streaming
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23. Response Streaming
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24. Form Processing
• @FormParam
• @FormDataParam
• FormParamIterator
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25. Security
• Security is done via a central server issuing
JWT tokens
• The JWTSecurityInterceptor verifies the
signature, expiry & claims in the token

26. Analytics & Monitoring
• Supports annotations
• Timed – measures execution time
• Metered – measures rate of events
• Counted – Counts the total invocations
• HTTPMonitored – monitors HTTP requests

27. Analytics & Monitoring

28. Metrics Output to Console

29. JMX Metrics

30. Analytics & Monitoring

31. MSF4J Pet store sample

32. MSF4J Pet store sample

33. CONTACT US !
http://wso2.com