World Tables

This was an experiment to implement an Egui interface with an API built using Axum, making them work together as if the two were a single application. Although currently limited to single-user use, this project was made thinking about future, multi-user applications.

Screenshots

Notes

• This was only tested on Linux so far.

• I didn't want the Egui app to block when sending requests and waiting for the API but I saw no reason to use tokio as in this case you are limited anyway to the speed of button clicks from the user. I just used plain std::thread to create threads that handle the requests and communicate back to the main thread through channels.

• Since I'm using threads I don't know if the app works on wasm. It might just work using wasm_thread and reqwasm.

• Using Sqlite with rust (rusqlite) and the best approach of using it with either multi-threading or asynchronous programming seems to be a matter of debate among people, with no clear consensus or documentation on the best approach. I decided to just use a pool manager with r2d2 but in this test I'm still not properly using tokio::spawn_blocking. As a result, database calls within the API's async handlers are still blocking, which is not a big deal for this app.

• I didn't want to use a complicated ORM setup for the database so I have more control over the queries and experiment later on. Instead, a set of simple helper traits were made to still organize the code as if I was using an ORM, and I split that up to the dbent library.

Usage

This project uses cargo-make for building and running. To install cargo-make, run the following command:

cargo install cargo-make

Once installed, you can build the server and all other components by running:

cargo make server

Please note that this will not only build the components, but it should also run the server with the GUI application if successful. The first time you run the server, the SQLite database will be created in a user directory, which may take some time to finish.

Resources

• Countries-States-Cities Database - Data source with extra processing to create additional tables and relationships.

• Catppuccin/egui - The cool Frappé theme for egui with a few personal customizations.

License

Licensed under either of Apache License, Version 2.0 or MIT License at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in World-Tables by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.