Microservices in real life

1. ACCENTURE
TECHNOLOGY
MEETUP
Microservices In Real Life

2. ▪ PROCESS DESIGN
▪ SOLUTION ARCHITECTURE
▪ SYSTEM INTEGRATION
▪ DATA MANAGEMENT
INDUSTRY X.0
▪ INDUSTRIAL AUTOMATION
▪ SOFTWARE DEVELOPMENT
▪ PRODUCT DESIGN
ABOUT ACCENTURE
Copyright © 2019 Accenture. All rights reserved. 2
Accenture is a LEADING GLOBAL PROFESSIONAL
SERVICES COMPANY
VÁCI GREENS
• 200 people
• Consulting, Technology,
Operations
HAUSZMANN ALAJOS
• 150 people
• Digital IX.0 Operations
▪ BUSINESS INTELLIGENCE
▪ TEST AUTOMATION
▪ SALESFORCE
▪ MICROSOFT
▪ FRONTEND
▪ JAVA
▪ SAP

3. SPIKE
Automate
lending
process

4. WHAT ARE MICROSERVICES?
• Fine grained business capabilities
• Loose coupling
• Independent
• Reusable
„Make each program do one thing well. To do a new
job, build afresh rather than complicate old programs
by adding new "features".”[1]

5. SPIKE’S SOLUTION
Person Domain
Microservice
Domain API
I’ve been
hacked

6. AUTHENTICATION
• HTTP
• Client Token
• SSO
• Sticky Session
• API Gateway
• Third Party Access

7. SPIKE’S SOLUTION V2
Gateway
Person Domain
Microservice
Domain API
I didn’t had to
authenticate
before

8. • Semver
• MAJOR.MINOR.PATCH
• Compatibility tracking
• URL
• Permalink
• Deprecation
VERSIONING
GET /v1/loan/1
GET /v2/loan/1

9. • Response codes
• 410 Gone
• 301 Moved permanently
• 302 Found
• Body
• Accept header
• X-Protocol-Version
• application/vnd.custom+json; version=1.0
• Hypermedia
VERSIONING
"version": „v1.2.3",

10. SPIKE’S SOLUTION V2
Gateway
Person Domain
Microservice
Domain API
It’s too slow

11. • Automation
• Load Balancing
• Orchastrating
• Configuration Management
• Dynamic Scaling
• Centralized Metrics
• Logging
SCALABILITY

12. SPIKE’S SOLUTION V3
Application Gateway
Person Domain
Microservice
Domain API
I don’t
remember
Jeff

13. • Stateless?
• What to preserve?
• In-memory?
• Failure?
PRESERVING STATE

14. JEFF’S SOLUTION
Application Gateway
Person Domain
Microservice
Domain
DB
Domain API
Should’ve
asked me!
Ted

15. • Timeout
• Polling
• Callback
• Events
EXTERNAL DEPENDENCIES

16. • State machine
• Retry policy
• Circuit breaker
• Rollback?
PREPARING FOR FAILURE

17. TED’S SOLUTION
Reactive Interaction Gateway
EVENT HUB
Person Domain
Microservice
Event Consumer /
Producer
Domain
DB
Domain API
SalesPoint
Domain
Microservice
Event Consumer /
Producer
Domain
DB
Domain API
It’s not
that
simple!
Jill

18. • One service
• Self contained
• Overlapping
• Multipath
• Workflow
COMPLEX LOGIC

19. JILL’S SOLUTION
Reactive Interaction Gateway
EVENT HUB
mService mService mService
Orchestrated
Async Task
Orchestrated
Async Task
Orchestrated
Async Task
Async ORCHESTRATOR
Micro Service Implementing Workflow Following SAGA pattern
Event Consumer / Producer
Credit Evaluation DomainPerson Domain
Microservice
Event Consumer /
Producer
Domain
DB
Domain API
SalesPoint
Domain
Microservice
Event Consumer /
Producer
Domain
DB
Domain API
Domain API
Back in my
time…
Bob

20. LEGACY SYSTEM DECOUPLING
• New Domain
• Wrapper
• Light replacement
• Replacement
• Data integrity
• Change Data Capture
• Transformers

21. Core
BOB’S SOLUTION
Reactive Interaction Gateway
EVENT HUB
mService mService mService
Orchestrated
Async Task
Orchestrated
Async Task
Orchestrated
Async Task
Async ORCHESTRATOR
Adapter
Event Consumer /
Producer
API
WebServices
Micro Service Implementing Workflow Following SAGA pattern
Event Consumer / Producer
Credit Evaluation Domain
Legacy /
3rd party
system
Legacy DB
CDC/Batch
CB Cache
Person Domain
Microservice
Event Consumer /
Producer
Domain
DB
Domain API
SalesPoint
Domain
Microservice
Event Consumer /
Producer
Domain
DB
Domain API
Domain API
Legacy Transformer
DB / In-Memory
Event Consumer /
Producer
Nice
theory!
Albert

22. ARES
• Digital Decoupling Approach
• API Gateway
• Specialized Views
• Data Lake

23. ALBERT’S SOLUTION

24. THANK YOU
accenture.com/beyourself