README

--
!Continuous Integration

Online Boutique is a cloud-first microservices demo application.  The application is a
web-based e-commerce app where users can browse items, add them to the cart, and purchase them.

Google uses this application to demonstrate how developers can modernize enterprise applications using Google Cloud products, including: Google Kubernetes Engine (GKE), Cloud Service Mesh (CSM), gRPC, Cloud Operations, Spanner, Memorystore, AlloyDB, and Gemini. This application works on any Kubernetes cluster.

If you’re using this demo, please ★Star this repository to show your interest!

Note to Googlers: Please fill out the form at go/microservices-demo.

 Architecture

Online Boutique is composed of 11 microservices written in different
languages that talk to each other over gRPC.



Find Protocol Buffers Descriptions at the ./protos directory.

| Service                                              | Language      | Description                                                                                                                       |
| ---------------------------------------------------- | ------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| frontend                           | Go            | Exposes an HTTP server to serve the website. Does not require signup/login and generates session IDs for all users automatically. |
| cartservice                     | C            | Stores the items in the user's shopping cart in Redis and retrieves it.                                                           |
| productcatalogservice | Go            | Provides the list of products from a JSON file and ability to search products and get individual products.                        |
| currencyservice             | Node.js       | Converts one money amount to another currency. Uses real values fetched from European Central Bank. It's the highest QPS service. |
| paymentservice               | Node.js       | Charges the given credit card info (mock) with the given amount and returns a transaction ID.                                     |
| shippingservice             | Go            | Gives shipping cost estimates based on the shopping cart. Ships items to the given address (mock)                                 |
| emailservice                   | Python        | Sends users an order confirmation email (mock).                                                                                   |
| checkoutservice             | Go            | Retrieves user cart, prepares order and orchestrates the payment, shipping and the email notification.                            |
| recommendationservice | Python        | Recommends other products based on what's given in the cart.                                                                      |
| adservice                         | Java          | Provides text ads based on given context wor