YouTube Link: https://youtu.be/xuH81XGWeGQ ** Microservices Architecture Training: https://www.edureka.co/microservices-... ** This Edureka's video on Microservices Design Patterns talks about the top design patterns you can use to build applications. In this video, you will learn the following: 1:29 Why do we need Design Patterns? 3:41 What are Design Patterns? 4:28 What are Microservices? 6:00 Principles behind Microservices 10:24 Microservices Design Patterns Follow us to never miss an update in the future. YouTube: https://www.youtube.com/user/edurekaIN Instagram: https://www.instagram.com/edureka_learning/ Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka Castbox: https://castbox.fm/networks/505?country=in

1. Copyright © 2017, edureka and/or its affiliates. All rights reserved.

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PRINCIPLES BEHIND MICROSERVICES
WHAT ARE MICROSERVICES?
WHAT ARE DESIGN PATTERNS?
WHY DO WE NEED DESIGN PATTERNS?
MICROSERVICES DESIGN PATTERNS

3. WHY DO WE NEED DESIGN PATTERNS?
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4. WHY DO WE NEED DESIGN PATTERNS?
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Process 1 Process 2 Process 3
Works Successfully Shows few errors Shows few errors

5. WHY DO WE NEED DESIGN PATTERNS?
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So, the development ream cannot build the application using the
process 2and 3

6. WHY DO WE NEED DESIGN PATTERNS?
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By using Design Patterns, the team working on various
projects use the same pattern to build similar applications.

7. WHAT ARE DESIGN PATTERNS?
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8. WHAT ARE DESIGN PATTERNS?
Software Design Pattern can be defined as a software
template or a description to solve a problem that occurs
in multiple instances while designing a Software
Application or a Software Framework.
DESIGNPATTERN
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9. WHAT ARE MICROSERVICES?
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10. WHAT ARE MICROSERVICES?
Microservices, aka Microservice Architecture, is an
architectural style that structures an application as a
collection of small autonomous services, modelled
around a business domain. In a Microservice
Architecture, each service is self-contained and
implements a single business capability.
MICROSERVICES
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11. PRINCIPLES BEHIND MICROSERVICES
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12. PRINCIPLES BEHIND MICROSERVICES
Independent &
Autonomous Services
DecentralizationScalability
Resilient Services
Real Time Load
Balancing
Availability
Continuous delivery
through DevOps
Integration
Seamless API
Integration &
Continuous Monitoring
Auto -Provisioning
Isolation from
Failures
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13. MICROSERVICES DESIGN
PATTERNS
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14. AGGREGATOR
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15. AGGREGATOR
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Collects Related Items Of Data And Displays Them
Based On DRY Principle
Aggregator
Service A
Service B

16. API GATEWAY
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17. API GATEWAY
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Can Convert The Protocol Request From One Type To Other
API Gateway Acts As An Entry Point To Forward The Clients
Requests To Appropriate Microservices
API GatewayClient Load Balancer
Service A
Service B

18. CHAINED OR CHAIN OF RESPONSIBILITY
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19. CHAINED OR CHAIN OF RESPONSIBILITY
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Produces A Single Output Which Is A Combination Of Multiple
Chained Outputs.
Use Synchronous HTTP Request Or Response For Messaging
Service A Service B Service C

20. ASYNCHRONUS MESSAGING
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21. ASYNCHRONUS MESSAGING
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All The Services Can Communicate With Each Other, But They Do
Not Have To Communicate With Each Other Sequentially
Service A Service B Service C
Queue

22. DATABASE
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23. DATABASE
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Database Per Service Shared Database
Service A
Service B
Service C Service D

24. EVENT SOURCING
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25. EVENT SOURCING
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Creates Events Regarding The Changes In The Application State
EventsPresentation Layer Event Store
Materialized View Query for Current State External Systems

26. BRANCH
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27. BRANCH
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Simultaneously Process The Requests And Responses From Two
Or More Independent Microservices
Service A
Service B
Service C Service D

28. COMMAND QUERY RESPONSIBILTY
SEGREAGTOR(CQRS)
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29. CQRS
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Application Is Divided Into Two Parts: Command And Query
Command
write
Query
read
Command Part Handles All The Requests
Related To CREATE, UPDATE, DELETE.
Query Part Takes Care Of The
Materialized Views

30. CIRCUIT BREAKER
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31. CIRCUIT BREAKER
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Used To Stop The Process Of Request And Response If A Service
Is Not Working.
Remote ServiceClient Load Balancer
Service A
Service C
Circuit Breaker
Service B
Down Service

32. DECOMPOSITION
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33. DECOMPOSITION
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Decomposition of Applications According To
Sub-Domains of
Application
Business
Capability
Strangler or Vine
Pattern

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