Building Services with WSO2 Microservices framework for Java and WSO2 AS
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This document provides an overview of building microservices with WSO2 technologies. It introduces microservices architecture and the WSO2 Microservices Framework for Java (MSF4J). MSF4J allows developing microservices using Java annotations in a lightweight and high-performance way. The document demonstrates hands-on examples of creating microservices with MSF4J and deploying them to Kubernetes. It also discusses the current and future state of the WSO2 Application Server, including its integration with other WSO2 products.
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Building Services with WSO2 Microservices framework for Java and WSO2 AS
- 1. Building Services with WSO2 Microservices Framework for Java and WSO2 Application Server Kasun Gajasinghe & Kishanthan Thangarajah WSO2
- 2. Agenda • Introduction to Microservices Architecture • Introduction to WSO2 MSF4J – Hands-on Sessions • Introduction to Kubernetes/Docker • Demonstrating MSF4J deployment with Kubernetes • Introduction to WSO2 Application Server – Hands-on Session
- 3. Microservices Architecture A method of developing software applications as a suite of independently deployable, small, modular services in which each service runs a unique process and communicates through a well-defined, lightweight mechanism to serve a business goal.
- 5. Inner & Outer Architecture http://blogs.gartner.com/gary-olliffe/2015/01/30/microservices-guts-on-the-outside/
- 6. WSO2 Microservices Framework for Java (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 JAX-RS 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
- 7. MSF4J Implementation • Based on the new WSO2 Carbon 5.0 kernel • Transport is based on Netty 4.0 • Supports streaming • High performance • 5MB pack size • Starts within 300ms • ~25MB memory consumption for the framework
- 9. MSF4J Memory Consumption Comparison
- 10. Core Features of MSF4J • Quick & simple development model using simple annotations • Lightweight & high performance • Custom interceptors • OAuth based security • Metrics gathering & publishing • 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
- 12. Developer Experience & Programming Model
- 13. Development Model • Maven Archetype • IDE/Build Classpath (msf4j-all.jar) • Tooling (Swagger -> Code)
- 14. Maven pom.xml
- 16. Example - StockQuote Microservice
- 17. Application - Main Class
- 18. Build and Run !!! mvn clean install java -jar stockquote-1.0.0.jar
- 19. Tooling - WSO2 Developer Studio
- 20. Types of Deployment • Standalone, Self contained jar files • OS / Container images
- 21. Analytics & Monitoring Supports annotations • Timed – measures execution • Metered – measures rate of events • Counted – counts the total invocations • HTTPMonitored – monitors HTTP requests
- 23. Service Metrics - Console Output
- 25. Security • Security is done via a central server issuing JWT or OAuth tokens. • The OAuth2SecurityInterceptor verifies the token before accessing the resources.
- 27. Hello World! 1. Build the sample - wso2msf4j-dist-1.0.0 /samples/helloworld mvn clean install 2. Run the sample java -jar helloworld-*.jar 3. Test the sample curl http://localhost:8080/hello/wso2
- 28. Generate a sample with Maven archetype mvn archetype:generate - DarchetypeGroupId=org.wso2.msf4j - DarchetypeArtifactId=msf4j-microservice -DarchetypeVersion=1.0.0
- 29. Hands-on - Write a StudentService • API - – GET /student/getAll - get all students – GET /student/get/{id} - get student with {id} – POST /add - add a student • Intercept requests • Monitoring
- 30. Service class annotations • JAX-RS HTTP resource methods - @GET @POST @PUT @DELETE • Content-negotiation - @Produces @Consumes • Service lifecycle - @PreDestroy @PostDestroy
- 31. HTTP Monitoring with Data Analytics Server 1. Refer the sample - wso2msf4j-1.0.0/samples/metrics- httpmon/metrics-httpmon-fatjar
- 32. Production Deployment with Kubernetes and Docker
- 33. Virtual Machines vs Containers
- 34. What is Docker • Container Virtualization • Build, pack, ship and run applications as containers • Build once, run in many places • Isolated
- 37. Kubernetes • Kubernetes is an open source orchestration system for Docker containers • Docker -> Container lifecycle management • Kubernetes -> Orchestration and container cluster management “Kubernetes, I need 5 Tomcat and one MySQL server running at all times.”
- 38. Kubernetes in a Nutshell
- 39. Kubernetes UI
- 40. PetStore sample
- 41. Petstore sample
- 42. Petstore sample
- 43. Petstore sample - deployment view
- 44. Demo - Petstore
- 45. Building Services with WSO2 Application Server
- 46. Current status of Application Server • Latest release - AS 5.3.0 • Built on top of WSO2 Carbon • Embedded Apache Tomcat 7 and Apache TomEE 7 • First class support for – JAX-WS and JAX-RS services – JavaEE 6 Web Profile applications
- 47. Future plan for Application Server • Upcoming release - AS 6.0 • NOT based on WSO2 Carbon or OSGi! • Built on top of Apache Tomcat
- 48. AS 6.0 • HTTP Request Monitoring for Tomcat • Seamless integration with WSO2 Identity Server for SAML SSO Authentication • Classloading improvements Upcoming - Integration with WSO2 API Manager for exposing APIs. (API Everywhere!)
- 49. Hands-on Session
- 50. Questions?
- 51. Thank You