Microservices in .NET Core

Sample shopping cart implementation from the book Microservices in .NET Core by Christian Horsdal Gammelgaard, ISBN 9781617293375.

Running .NET 5.0 on a Raspberry Pi with a 64-bit operating system inside a Docker container.

Debug the Unit Tests

1. Clone the repository into an IDE
2. Build the project: debug configuration
3. Verify 22 unit tests pass
4. Debug the unit tests
   1. Breakpoint: ShoppingCartController.cs, line 55
   2. Debug: ShoppingCartControllerTest.cs, AddCartItemTest()

Deploy the Microservices

1. Start with a Raspberry Pi
2. Install a 64-bit operating system
3. Install Docker
   1. Select arm64 in step three
4. Install Docker-Compose
   1. Use the Alternative Install Options
   2. sudo apt install python3-pip
   3. pip3 install docker-compose
   4. export PATH="$PATH:$HOME/.local/bin"
5. Clone the repository
   1. sudo apt install git
   2. git clone https://github.com/GregEakin/Microservices.git
6. cd Microservices
7. docker-compose build
8. docker-compose up -d
9. docker-compose ps
10. Database PostgreSQL: host rpi, port 5432, user cartapp, pass cartpw
    1. Manually add UserIds to Shopping Cart table
11. Review the API: Postman
    1. ProductCatalogSvc: http://rpi:8086/swagger/index.html
       1. GET http://rpi:8086/api/Products/products?id=0&id=19
    2. ShoppingCartSvc: http://rpi:8087/swagger/index.html
       1. POST http://rpi:8087/api/ShoppingCart/14/items [0,19]
       2. GET http://rpi:8087/api/ShoppingCart/14
       3. DELETE http://rpi:8087/api/ShoppingCart/14/items [0,19]
12. docker-compose down --volumes
13. docker-compose push

Current Shopping Cart Features

• REST ASP.NET interface
• Persistence storage - Database
• Get cart contents
• Add products to the cart
• Empty the cart
• Ask Product Catalog for information
• Caching Product Catalog information
• Generate event notifications
• Unit Tests

Current Product Features

• REST ASP.NET interface
• Returns dummy information
• Unit Tests

Additional Shopping Cart Features Needed

• Product Copy and Pictures
• Inventory Events
• Customers
• Reservations
• Promotions
• Save for Later
• Suggestions
• Send reminders

Additional Services Needed

• Event Logging
• Customers
• Inventory
• Suppliers
• Shippers
• Promotions
• Accounting
• Security
• Performance
• Feedback
• Wish List
• Collections
• Advertising
• Browsing History
• Help