The project backend is written in very straightforward Scala without tricky FP and types acrobatics. If you are an experienced Java developer but don't know Scala, I believe Scala should not become a big barrier.

Frontend is written in TypeScript and React.

For describing backend <----> frontend communication contract (API), we use Protobuf.

Development environment

We use Nix to install all tools and other dependencies required for development. You don't need to install JVM, Node, Protobuf compiler separately.

• Install Nix
• Install git-lfs
• Add the following content to your ~/.gitconfig:

[filter "lfs"]
        required = true
        clean = git-lfs clean -- %f
        smudge = git-lfs smudge -- %f
        process = git-lfs filter-process

• Use make dev command at the repository root to enter the development environment shell.
• Go to ./devenv directory and run make dev-local to start local Pulsar-standalone instance in Docker.
• Go to the Protobuf definitions directory cd ./proto and run make build here.
• Go to the server directory cd ./server and run sbt, then run here.
• Open a second terminal, go to the UI directory cd ./ui and run make dev here.

Frontend

If you're using VSCode, use this snippet to create a new component from a template: https://gist.github.com/visortelle/271627130d7dfcfa44e1f71fc5b6dfaf

CI

Run act to run GitHub Actions job locally.

Resources

• LEARNING.md