This document discusses the design of a microservices architecture. It describes how the system was broken up into multiple independent APIs for different business capabilities like identity, payments, inventory etc. Each API and business capability is self-contained and separated from the others. The document also discusses how logging and monitoring was implemented on a per-API and per-action basis to improve traceability and debugging. It advocates for pragmatic and iterative design approaches over perfectionism.

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Up

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MONOLITH MICROSERVICES

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DESIGN
DESIGN
DESIGN

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Person
Order
Company
... Customer

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Person
Order
Company
... Customer

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WHAT WE DID

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API s
Identity
API
API s

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API s
Public
Business
API
Identity
API
Integration
API API s

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API s
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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API s
Parse
API
WebJob Process
API
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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Parse
API
WebJob Process
API
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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Parse
API
WebJob Process
API
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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Parse
API
WebJob Process
API
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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Parse
API
WebJob Process
API
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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API s
Parse
API
WebJob Process
API
Public
Business
API
Business
Mngmt
API
Identity
API
Integration
API API s

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Logging group Message DateTime
1 Entering action 2018-04-21 17:40:23
1 Exiting action 2018-04-21 17:40:26
2 Entering another action 2018-04-21 17:40:23
3 Logging something 2018-04-21 17:40:24
2 Exiting another action 2018-04-21 17:40:23
3 Logging something else 2018-04-21 17:40:25
4 Some exception 2018-04-21 17:40:21
4 Another exception 2018-04-21 17:40:25
1 Entering action 2018-04-21 17:40:24
…
…

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PER ACTION
SEGREGATION

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SOFTWARE
DESIGN

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GET STUFF DONE

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NO SHARE
NO CRYhttps://wallup.net/wp-content/uploads/2016/06/06/3791-Bob_Marley.jpg

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Message bus
Checkout Search Inventory

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Message bus
Checkout Search Inventory
Payment
Creditcard Bank Giftcard

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DESIGN IS HARD
IMPLEMENTATION IS EASY

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EASIER DEPLOYMENT

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LOGGING & MONITORING

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PRAGMATISM>PERFECTIONISM

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