https://github.com/ivan-montes/hexagonal-cqrs-proof

Multimodule Maven project with Hexagonal Architecture, CQRS, and Kafka for synchronizing databases
https://github.com/ivan-montes/hexagonal-cqrs-proof

cqrs docker docker-compose hexagonal-architecture java kafka kafka-ui maven redis sonarqube spring swagger

Last synced: 2 months ago
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Multimodule Maven project with Hexagonal Architecture, CQRS, and Kafka for synchronizing databases

Host: GitHub
URL: https://github.com/ivan-montes/hexagonal-cqrs-proof
Owner: Ivan-Montes
License: gpl-3.0
Created: 2024-04-27T06:16:13.000Z (about 2 years ago)
Default Branch: main
Last Pushed: 2024-10-22T10:59:57.000Z (over 1 year ago)
Last Synced: 2025-03-29T11:16:26.591Z (about 1 year ago)
Topics: cqrs, docker, docker-compose, hexagonal-architecture, java, kafka, kafka-ui, maven, redis, sonarqube, spring, swagger
Language: Java
Homepage:
Size: 204 KB
Stars: 1
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md

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README

          # hexagonal-cqrs-proof

Multimodule Maven project with Hexagonal Architecture, CQRS, and Kafka for synchronizing databases

**Components**

- [Kafka](https://kafka.apache.org/) [9092] + [9093] 

- [Kafka-UI](https://docs.kafka-ui.provectus.io/) [8080]

- REST API ms-artist with [OpenApi Swagger](https://swagger.io/) and two separate DB for R/RW actions [8081]

- REST API ms-media with [OpenApi Swagger](https://swagger.io/) and two separate DB for R/RW actions [8082]

- [Redis](https://redis.io/) DB in every microservice work as caches to store ID references for other REST APIs

```mermaid

graph RL

subgraph ms-artist

  direction LR

  subgraph ms-artist-ms

   A{{ms-artist}}

  end

  subgraph ms-artist-db

  direction LR

   A1[(NoSql Read Db)]

   A2[(Sql Write Db)]

   A3[(Redis Backup Db)]

   end

end

  Kafka(((Kafka)))

  KafkaUI(KafkaUI)

subgraph ms-media

  direction RL

  subgraph ms-media-ms

   B{{ms-media}}

  end

  subgraph ms-media-db

  direction RL

   B1[(NoSql Read Db)]

   B2[(Sql Write Db)]

   B3[(Redis Backup Db)] 

  end

end  

  

  ms-media-db <--> ms-media-ms

  ms-artist-db <--> ms-artist-ms

  ms-artist -->|Publish| Kafka

  Kafka -->|Subscriber| ms-artist

  ms-media -->|Publish| Kafka

  Kafka -->|Subscriber| ms-media

  KafkaUI <--> Kafka

  B1 <-.SYNCHRO.-> B2

  A1 <-.SYNCHRO.-> A2

```

## Table of contents

- [Installation](#installation)

- [Usage](#usage)

- [It's not a bug, it's a feature](#features)

- [Maintainers](#maintainers)

- [License](#license)

## Installation

1. First of all clone or download the project.

1. Inside the main folder, you could find two docker-compose yaml files.

1. From there use the command line to start the project in dev or production mode

```

    **Generate .jar**

    mvn clean package

    

    **Developer mode**  

    docker-compose -f docker-compose-dev.yml up -d

    **Production mode**

    docker-compose -f docker-compose-prod.yml up -d

```

      

The dev environment is ready for using with your IDE. The microservice attempts to communicate with Kafka using the local host. In production, it uses the archive Dockerfile to build an image of the project, so you wont need the IDE.

   

4. You could stop the project and free resources with any of these orders

```

    **Developer mode**

    docker-compose -f docker-compose-dev.yml down --rmi local -v

      

    **Production mode**

    docker-compose -f docker-compose-prod.yml down --rmi local -v  

```

   

## Usage

First of all, please visit the REST API documentation. Replace ${port} for the suitable microservice port:

    http://localhost:${port}/swagger-ui/index.html

    

[Kafka-UI](https://docs.kafka-ui.provectus.io/) allow you to check your [Kafka](https://kafka.apache.org/) server using a practical dashboard, so visit the following url:

    http://localhost:8080

    

## Features

#### :white_check_mark: Unit testing for business logic classes

#### :white_check_mark: Include two docker-compose yaml files for easy change of environment

#### :white_check_mark: Hexagonal Architecture following Clean Architecture principle

#### :white_check_mark: CQRS pattern with independent databases for Read or RW actions

#### :white_check_mark: DB synchronization by Publisher-Subscriber pattern

#### :white_check_mark: Redis DB in every microservice work as caches to store ID references for other REST APIs

## Maintainers

Just me, [Iván](https://github.com/Ivan-Montes) :sweat_smile:

## License

[GPLv3 license](https://choosealicense.com/licenses/gpl-3.0/)

---

[![Java](https://badgen.net/static/JavaSE/17/orange)](https://www.java.com/es/)

[![Maven](https://badgen.net/badge/icon/maven?icon=maven&label&color=red)](https://https://maven.apache.org/)

[![Spring](https://img.shields.io/badge/spring-blue?logo=Spring&logoColor=white)](https://spring.io)

[![GitHub](https://badgen.net/badge/icon/github?icon=github&label)](https://github.com)

[![Eclipse](https://badgen.net/badge/icon/eclipse?icon=eclipse&label)](https://https://eclipse.org/)

[![SonarQube](https://badgen.net/badge/icon/sonarqube?icon=sonarqube&label&color=purple)](https://www.sonarsource.com/products/sonarqube/downloads/)

[![Docker](https://badgen.net/badge/icon/docker?icon=docker&label)](https://www.docker.com/)

[![Kafka](https://badgen.net/static/Apache/Kafka/cyan)](https://kafka.apache.org/)

[![GPLv3 license](https://badgen.net/static/License/GPLv3/blue)](https://choosealicense.com/licenses/gpl-3.0/)

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