Services
To visualize request flows, see the Service Diagram.
| Service | Language | Description |
|---|---|---|
| accounting | .NET | Processes incoming orders and count the sum of all orders (mock/). |
| ad | Java | Provides text ads based on given context words. |
| agent | Python | Provides an AI assistant that routes user prompts through a LangGraph agent using built-in or MCP-provided shop tools. |
| cart | .NET | Stores the items in the user’s shopping cart in Valkey and retrieves it. |
| chatbot | Python | Provides a Gradio-based chat UI that forwards user messages to the agent service. |
| checkout | Go | Retrieves user cart, prepares order and orchestrates the payment, shipping and the email notification. |
| currency | C++ | Converts one money amount to another currency. Uses real values fetched from European Central Bank. It’s the highest QPS service. |
| Ruby | Sends users an order confirmation email (mock/). | |
| flagd-ui | Elixir | Allows toggling and editing of feature flags. |
| fraud-detection | Kotlin | Analyzes incoming orders and detects fraud attempts (mock/). |
| frontend | TypeScript | Exposes an HTTP server to serve the website. Does not require sign up / login and generates session IDs for all users automatically. |
| load-generator | Go/k6 | Continuously sends requests imitating realistic user shopping flows to the frontend. |
| mcp | Python | Exposes the shop tools over the Model Context Protocol for the agent and other MCP-compatible clients. |
| payment | JavaScript | Charges the given credit card info (mock/) with the given amount and returns a transaction ID. |
| product-catalog | Go | Provides the list of products from a JSON file and ability to search products and get individual products. |
| quote | PHP | Calculates the shipping costs, based on the number of items to be shipped. |
| recommendation | Python | Recommends other products based on what’s given in the cart. |
| shipping | Rust | Gives shipping cost estimates based on the shopping cart. Ships items to the given address (mock/). |
| react-native-app | TypeScript | React Native mobile application that provides a UI on top of the shopping services. |
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