NET5-Microservices-Using-MassTransit

Example: .NET 5 Microservices using MassTransit. It is easy to use and migrate from RabbitMQ to AmazonSQS and SNS for each environments.

+ RabbitMQ
    - Direct Queue(queue:consumer-consumers-order)
    - Exchange Topic: notification
        - Topic=email: will be received by EmailService
        - Topic=push: will be received by Notification
+ Amazon SQS and SNS
    - Direct Queue(queue:consumer-consumers-order)(Topic:Messages_Commands-Order),
        create a queue and create a SNS Topic which link the queue
    - Topic:Messages_Commands-INotification, Routing key: "push" and "email"

Requirements

• Install .NET5
• Install Docker & Docker Compose
  • RabbitMQ Server Dashboard(http://localhost:15672/)

Structures

---

• Producer: using the API sends messages
• Consumer: receive messages from Queue(consumer-consumers-order)
• Notification: receive messages with Exchange=notification and Topic=push
• EmailService: receive message with Exchange=notification and Topic=email
• Messages: create message model and Service Connection Config for RabbitMQ and AmazonSQS

Overview

---

• Direct Queue

  

• Topic

  

Usages

RabbitMQ Server

---

• Start RabbitMQ Server

  cd DemoMicroservices
  docker-compose up
  

Amazon SQS and SNS

---

• Create a user in IAM: add SQSFullAccess and SNSFullAccess
• Set and add Region, AccessKey and SecretKey into MessageBusSQS in appsettings.json

  "ConnectionStrings": {
      "MessageBus": "amqp://admin:password@localhost:5671/",
      "MessageBusSQS": "[AccessKey]:[SecretKey]@[region]"
  },
  "UsingAmazonSQS":"true"
  

Direct Message

---

• Amazon Queue(Direct Queue:consumer-consumers-order)

  

• Create topic SNS Endpoint: arn:aws:sqs:ap-southeast-1:783560535431:consumer-consumers-order

  

• Monitor SQS

  

Topic

---

• Amazon Topic SNS

  

• Subcription Topic with SQS, and set RoutingKey

  

Run

---

• Start multi apps with Visual Studio

• Run Producer: http://localhost:22270/swagger/index.html

  • Send a message to Queue(consumer-consumers-order), Run post Order API

    http://localhost:22270/Order
    

  • Send a message to Email Service, run post Notification API

    http://localhost:22270/Notification
    
    {
        "notificationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
        "notificationType": "email",
        "notificationContent": "email body",
        "notificationAddress": "[email protected]",
        "notificationDate": "2021-12-06T04:31:16.654Z"
    }
    

  • Send a message to Notification, run post Notification API

    http://localhost:22270/Notification
    
    {
        "notificationId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
        "notificationType": "push",
        "notificationContent": "body",
        "notificationAddress": "",
        "notificationDate": "2021-12-06T04:31:16.654Z"
    }
    

References

---

• Setting Up MassTransit and RabbitMQ
• RabbitMQ with ASP.NET Core – Microservice Communication with MassTransit
• MassTransit a real use case