The document discusses WSO2 Microservices Framework for Java (MSF4J), which is a lightweight, high performance framework for building microservices in Java. MSF4J uses Java annotations to define microservices APIs and metrics. It provides a simple development model, is lightweight and fast, and has built-in support for metrics, analytics, and integration with WSO2 Data Analytics Server. The document reviews MSF4J's performance, memory usage, implementation details, features like security and tooling, and provides examples of MSF4J in use.

1. Creating Microservices
with
WSO2 Microservices Framework for Java
(MSF4J)
Afkham Azeez,
Director, Architecture
WSO2 Inc.

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

4. Recap: Inner & Outer Architectures

5. Vision for MSF4J
• Lightweight & fast runtime
• Use Java annotations as a way of defining microservices APIs as well as
metrics
• Support well known & widely used methods such as JAXRS annotations
• 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

6. MSF4J- Performance Comparison

7. MSF4J- Memory Consumption Comparison

8. MSF4J Implementation
• Transport is based on Netty 4.0
• Supports streaming
• High performance
• Low memory footprint
• 5MB pack size
• Starts within 300ms

9. Download
• MSS 1.0.0 release is available at
https://github.com/wso2/msf4j/releases/tag/v1.0.0
• Refer to the getting started guide in GitHub
• A good place to start is the samples
– https://github.com/wso2/msf4j/tree/v1.0.0/samples

10. Core Features in MSS
• Quick & simple development model using simple annotations
• Lightweight & high performance
• Custom interceptors
• JWT based security
• Metrics gathering & publishing
• Tracing of requests using a unique message ID
• Streaming input & streaming output support
• WSO2 DevStudio based tooling for generating microservices projects
starting from a Swagger API definition
• Comprehensive samples demonstrating how to develop microservices
application

11. MSF4J– Flow & Thread Model

13. Runner

14. Request Streaming

15. Security
• Security is done via a central server issuing JWT
tokens
• The JWTSecurityInterceptor verifies the
signature, expiry & claims in the token

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

17. Analytics & Monitoring

18. Metrics Output to Console

19. JMX Metrics

20. Analytics & Monitoring

21. Tooling (Swagger -> Code)
Swagger API
Definition
MSS Code
1
2
3

22. MSF4J in Action!
https://github.com/afkham/wso2conasia2016

23. MSF4J Pet store sample

24. MSF4J Pet store sample

25. Thank You