@alexsotob#Voxxed
What Monolith Can Learn From Microservices
Alex Soto Red Hat
@alexsotob2
Alex Soto
Red Hat Engineer www.lordofthejars.com @alexsotob
Who Am I?
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https://www.manning.com/books/testing-java-microservices
ctwvdv18 40% discount
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Questions
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@alexsotob6
Frontend
API Gateway
GameMicroservice
ReviewMicroservice
DetailMicroservice
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Frontend
GameMicroservice
ReviewMicroservice
DetailMicroservice
JVM
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Isolation of Code
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Isolation of Code
review
api
impl
detail
api
impl
game
api
impl
publicexposes only what is requiredfavour low-coupling
privatehighly cohesivereduces our memory footprint
IMPL
API
pmd, code-assert, checkstyle, maven enforcer
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Isolation of Data
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Isolation of Data
game schema
Game
Detaildetail schema
Reviewreview schema
Module == Schema
Joins inside Schema
Referential Integrity across Schemas
Global transactions
flyway, liquibase
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Reactive Extensions
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Reactive Java
Where to Run
Combiner
How to CombineFinal Run
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Network
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Circuit Breaker Pattern
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Circuit Breaker
Defines CB
Wrapped function
Recovery
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DEMO
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Front-End
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MicroFrontends
Code to embed
Custom name
https://micro-frontends.org/https://developers.google.com/web/fundamentals/web-components/customelements
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Your Stack Matters
Server Hardware
Operating System
Application Server
your.war
Java Virtual Machine
Custom Configuration
Linux Kernel Version & Distribution
Java 1.7.0_67
Tomcat, Wildfly, Jetty
JDBC driver, users
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Infrastructure
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Deploying in Cluster
Always two instances of the image
Docker image to run
Port
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Deploying in Cluster
Reverse Proxy Router
Number of instances LB
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Cloud Native Application
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Infrastructure
sticky session
Shopping Cart User A
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In-Memory Data Grid
In-Memory DataGridShopping Cart User A Shopping Cart User A
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Release as Unicorns
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Release as Unicorns
Build Dockerfile DeployBuild Container Testing in Production Release
s2i, OpenShift, Fabric8 Teiid, Debezium (Test Prod)
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Let’s Wind Down
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Advantages of monolith
> Local Calls
> All parts always up
> Easy to debug
> Easy to test
> Refactor without running surprises
> You see the real world every time
> Easy to deploy (coordination)
> Polyglot Languages, DB
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Digital Darwinism
Self-Service, On-Demand,
Elastic, Infrastructure
as Code
(Cloud)
Re-Org to DevOps
Automation Puppet, Chef,
Ansibleand/or
Kubernetes
CI & CD Deployment
Pipeline
Advanced Deployment Techniques
Microservices
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https://www.slideshare.net/dbryant_uk/oreilly-sacon-ny-2018-continuous-delivery-patterns-for-contemporary-architecture/2
You In The Near Future
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Stats serviceUser Service
Awards Service
Question Service
Advertise Service
Question Service
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NO, it is a monolithhttps://www.infoq.com/news/2015/06/scaling-stack-overflow
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“Long Live and Prosper to Monolith.”
—SPOCK
