Skip to content
Sample Application DDD, Reactive Microservices, CQRS Event Sourcing Powered by DERMAYON LIBRARY
JavaScript CSS HTML C# Other
Branch: master
Clone or download
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
.circleci wrong space type Nov 4, 2019
images README Nov 5, 2019
src implement QoS (Quality of Service) for handling Nov 12, 2019
.gitignore Initialize Skeleton Nov 2, 2019
README.md fixed small error Nov 5, 2019

README.md

POS - DDD, Reactive Microservices, CQRS Event Sourcing Powered by DERMAYON LIBRARY

Sample Application DDD Reactive Microservices with CQRS & Event Sourcing with DERMAYON LIBRARY.

Architectures

Image of Architecture

Features

  1. Microservices
  2. CQRS (Command Query Responsibility Segregation)
  3. Event Sourcing
  4. Generic Repository
  5. UnitOfWork
  6. Domain Driven Design
  7. Api Gateway Ocelot
  8. Multiple Databases type [MongoDb, SqlServer, etc]
  9. Message Broker [Kafka]

Information

Image of DDD

  1. Domain Layer : Main of Application like Event, Repository, etc
  2. Infrastructure Layer : Databases, Files, etc
  3. Application Layer : WebApi, etc

Main Architecture

Image of mainarchitecture

Microservices - also known as the microservice architecture - is an architectural style that structures an application as a collection of services that are

  1. Highly maintainable and testable
  2. Loosely coupled
  3. Independently deployable
  4. Organized around business capabilities
  5. Owned by a small team

The microservice architecture enables the rapid, frequent and reliable delivery of large, complex applications. It also enables an organization to evolve its technology stack. reference

API Gateway

Image of gateway

The API Gateway encapsulates the internal system architecture and provides an API that is tailored to each client. It might have other responsibilities such as authentication, monitoring, load balancing, caching,

CQRS Event Sourcing

Image of cqrss

CQRS stands for Command Query Responsibility Segregation. It's a pattern that I first heard described by Greg Young. At its heart is the notion that you can use a different model to update information than the model you use to read information. For some situations, this separation can be valuable, but beware that for most systems CQRS adds risky complexity.

Benefits when to use CQRS Event Sourcing Image of cqrsmaterialized

imagine if the system is too complex and more than 1K user hit in server, how many related tables? and how long does it take to get data? with cqrs & event sourcing we can implement materialized views, or in other words denormalized tables into one data or flat

Reactive Services, Reactive Manifesto, and Microservices

Image of reactive

The Reactive Manifesto outlines qualities of Reactive Systems based on four principles: Responsive, Resilient, Elastic and Message Driven.

  1. Responsiveness means the service should respond in a timely manner.
  2. Resilience goes in line with responsiveness, the system should respond even in the face of failure.
  3. Elasticity works with resilience. The ability to spin up new services and for downstream and upstream services and clients to find the new instances is vital to both the resilience of the system as well as the elasticity of the system.
  4. Message Driven: Reactive Systems rely on asynchronous message passing. This established boundaries between services (in-proc and out of proc) which allows for loose coupling (publish/subscribe or async streams or async calls), isolation (one failure does not ripple through to upstream services and clients), and improved responsive error handling.

Get started

Clone the repository

Run and Build the app

cd Pos 
docker-compose up

wait for completed Image of step1

List Url:Port the app

docker container ls

Image of step2

For sample we can navigate to PRODUCT SERVICES ::localhost:32771/swagger

Image of step3

Running in GATEWAY

Navigate to postgateway for sample ::localhost:32768/[SERVICES]/[Action]

Image of step4

Sample Running in Gateway http://localhost:[PosGatewayPort]/api-product/productCategory/7a3fff4b-54ca-4c21-bf04-c11aea9b7673 Image of step5

List of Gateway Services

  1. Product Services = localhost[::]/api-product/[action]
  2. Customer Services = localhost[::]/api-customer/[action]
  3. Order Services = localhost[::]/api-order/[action]
  4. Report Services = localhost[::]/api-report/[action]

Check Healty All Services

Image of step6

Keep Updates, I'will update for new best practices of technology & software design, architectural

Thanks

You can’t perform that action at this time.