Microservice Patterns - Implemented by Eclipse MicroProfile

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Microservice Patterns Implemented by Eclipse MicroProﬁle Ivar Grimstad  Principal Consultant, Cybercom Sweden

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@ivar_grimstad https://github.com/ivargrimstad https://www.linkedin.com/in/ivargrimstad

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@ivar_grimstad #microservices Introduction The Patterns Summary

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@ivar_grimstad #JakartaEE #EE4J

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #microservices M icroProﬁle 2.2 Februyary 12, 2019

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@ivar_grimstad #microservices The Patterns

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@ivar_grimstad #microservices 1. Microservice Architecture 2. Service per Container 3. Externalised Conﬁguration 4. Health Check API 5. Application Metrics 6. Circuit Breaker 7. Access Token 8. Distributed Tracing

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Microservice Architectures #1

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@ivar_grimstad #microservices What’s the application’s deployment architecture?

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@ivar_grimstad #microservices Monolithic Architecture Monolithic Application

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@ivar_grimstad #microservices Monolithic Architecture

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@ivar_grimstad #microservices Service A Service B Service C Application Call A Call B Call C Microservice Architecture

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@ivar_grimstad #microservices Microservice Architecture

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Service per Container #2

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@ivar_grimstad #microservices How are services packaged and deployed?

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@ivar_grimstad #microservices Application Server (Container) Service C Service B Service A Configuration A Configuration B Configuration C

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE Thin WAR

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE UberJAR

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE java -jar dukes.jar

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE Hollow JAR

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE java -jar dukes.jar dukes.war

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@ivar_grimstad #MicroProfile #JavaEE #EE4J #JakartaEE Hardware Operating System JVM UberJAR Hardware Operating System JVM MicroProfile Container MicroProfile Application Hardware Operating System JVM Java EE Container Java EE Application java -jar dukes.jar java -jar dukes.jar dukes.war deployDukes.sh

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Hardware Operating System JVM UberJAR Hardware Operating System JVM MicroProﬁle Container MicroProﬁle Application Hardware Operating System JVM Java EE Container Java EE Application docker run dukes docker run dukes docker run dukes

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Externalised Conﬁguration #3

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@ivar_grimstad #microservices How to enable a service to run in multiple environments without modiﬁcation?

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@ivar_grimstad #microservices Conﬁguration for MicroProﬁle

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@ivar_grimstad #microservices System Properties System.getProperties() Environment Variables System.getenv() Application Conﬁguration META-INF/microprofile-config.properties

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Health Check API #4

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@ivar_grimstad #microservices How to detect that a running service instance is unable to handle requests?

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@ivar_grimstad #microservices MicroProﬁle Health API

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Application Metrics #5

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@ivar_grimstad #microservices How to understand the behavior of an application and troubleshoot problems?

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@ivar_grimstad #microservices MicroProﬁle Metrics

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Circuit Breaker #6

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@ivar_grimstad #microservices How to prevent a network or service failure from cascading to other services?

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Access Token #7

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@ivar_grimstad #microservices How to communicate the identity of the requestor to the services that handle the request?

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@ivar_grimstad #microservices Basic Authentication

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@ivar_grimstad #microservices POST /hello HTTP/1.1 Host: localhost:8080 Authorization: Basic c25vb3850nBhc3M= User-Agent: HTTPie/0.9.9 Accept: */* Content-Type: application/json Content-Length: 26 {“message”:“Hello, Duke!”}

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@ivar_grimstad #microservices OAuth 2.0

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@ivar_grimstad #microservices POST /hello HTTP/1.1 Host: localhost:8080 Authorization: Bearer 2YotnF2FEjrlzCsidMWpAA User-Agent: HTTPie/0.9.9 Accept: */* Content-Type: application/json Content-Length: 26 {“message”:“Hello, Duke!”} POST /hello HTTP/1.1 Host: localhost:8080 Authorization: Basic c25vb3850nBhc3M= User-Agent: HTTPie/0.9.9 Accept: */* Content-Type: application/json Content-Length: 26 {“message”:“Hello, Duke!”} POST /hello HTTP/1.1 Host: localhost:8080 Authorization: Bearer 2YotnF2FEjrlzCsidMWpAA User-Agent: HTTPie/0.9.9 Accept: */* Content-Type: application/json Content-Length: 26 {“message”:“Hello, Duke!”}

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@ivar_grimstad #microservices JSON Web Token (JWT)

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@ivar_grimstad #microservices POST /hello HTTP/1.1 Host: localhost:8080 Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJ0b2tlbl90eXBlIjoiQ mVhcmVyIiwiYXVkIjoic2ltcGxlYXBwIiwic3ViIjoiYm9iIiwidXBuIjo iYm9iIiwiY3VzdG9tQ2xhaW0iOiJjdXN0b21WYWx1ZSIsImdyb3VwcyI6W yJhZG1pbiIsInVzZXIiXSwiaXNzIjoiaHR0cDovL29wZW5saWJlcnR5Lml vIiwiZXhwIjoxNTI1MzM5MjU5LCJpYXQiOjE1MjUyNTI4NTl9.nDDpCR2w MWsENaDGORQblErOCJ6ii1R-N6iSzVsAz2RoUlvM2PrST2qT6kje-Nz9vc ptbSpOSlF1OuJydvP8Tg3puJKI5vGyL4RMowgJHwdvv7hMZvrK1loNrPfb yv727L9UwJSZMdzL_sibiXDuj-bIBIr6yGjVF86aQnh-PWBV8HHM1iW8l1 _y351lp2CAPkfjKwLU91iIT1jO1QCwItF8Dv-zAzmhd_rOIF58eB809_5r m0MMGIuAXdgUiU2bdEJQCkTWJKNNaSu5oddZzlKaCX4hIgBdrVV6447DM0 i31YRhLpYHfbzh_NlRrRPjGPNgzOIN1RInwPC8jdg_g User-Agent: HTTPie/0.9.9 Accept: */* Content-Type: application/json Content-Length: 26 {“message”:“Hello, Duke!”}

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@ivar_grimstad #microservices ✦Header ✦ JSON, Base64 URL Encoded ✦ Algorithm, Type  ✦Payload ✦ JSON, Base64 URL Encoded ✦ Standard + Custom entries  ✦Signature ✦ Binary, Base64 URL Encoded ✦ The actual signature

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@ivar_grimstad #microservices { “alg”: “RS256”, “typ”: “JWT} { “token-type: “access-token”, “username”: “duke”, “scopes”: [ “java”: “everywhere” ], “exp”: 1474280963, “iat”: 1474279163 “jti”: “66881b068b249ad9” } nDDpCR2wMWsENaDGORQblErOCJ6ii1R-N6iSzVsAz2RoUlvM2PrST2qT6kje-Nz 9vcptbSpOSlF1OuJydvP8Tg3puJKI5vGyL4RMowg-JHwdvv7hMZvrK1loNrPfby v727L9UwJSZMdzL_sibiXDuj-bIBIr6yGjVF86aQnh-PWBV8HHM1iW8l1_y351l p2CAPkfjKwLU91iIT1jO1QCwItF8Dv-zAzmhd_rOIF58eB809_5rm0MMGIuAXdg UiU2bdEJQCkTWJKNNaSu5oddZzlKaCX4hIgBdrVV6447DM0i31YRhLpYHfbzh_N lRrRPjGPNgzOIN1RInwPC8jdg_g

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE Open Liberty

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Distributed Tracing #8

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@ivar_grimstad #microservices How to understand the behavior of an application and troubleshoot problems?

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices DEMO

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE Open Liberty

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Summary

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@ivar_grimstad #microservices

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@ivar_grimstad #MicroProﬁle #JavaEE #EE4J #JakartaEE

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@ivar_grimstad #JakartaEE #EE4J

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@ivar_grimstad #microservices

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@ivar_grimstad #microservices Microservice Architecture http://microservices.io Samples https://github.com/ivargrimstad/microservice-patterns Microproﬁle http://microproﬁle.io Jakarta EE https://jakarta.ee

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@ivar_grimstad #microservices cybercom.com Rem em ber to Vote!