Learning Modular Monolith Architecture with Rust

An 7-project progression from Hello World to a fully decoupled, I/O-agnostic application using traits and crates

🚧 This post is under construction 🚧

This is Episode 06

All the examples are on GitHub

The Posts Of The Saga

• Episode 00: Introduction + Step 00 - First prototype working
• Episode 01: Step 01 - Split the source code in multiple files
• Episode 02: Step 02 - Add a test folder
• Episode 03: Step 03 - Implement Hexagonal Architecture
• Episode 04: Step 04 - One crate per component
• Episode 05: Step 05 - Anyhow & ThisError
• Episode 06: Step 06 - Add new adapters + Conclusion

Table of Contents

• Objective
• Actions
  • Cargo.toml
  • Build, run & test
• Summary
• Conclusion
• Webliography
• Next Steps

Objective

We want …

Setup

• Save your work
• Quit VSCode
• You should have a terminal open and you should be in the step_06/ folder

cd ..
# make a copy the folder step_06 and name it step_07
Copy-Item ./step_06 ./step_07 -Recurse
cd step_07
code .

Actions

Cargo.toml

[workspace]
members = [
    "crates/domain",
    "crates/application",
    "crates/adapter_console",
    "crates/adapter_file",
    "crates/app",
]
resolver = "3"

[workspace.package]
version = "0.1.0"
edition = "2021"
license = "MIT"

# Shared dependencies across all crates
[workspace.dependencies]
thiserror = "2.0"
anyhow = "1.0"

Points of attention:

• …

Build, run & test

Build, run and test the application. Find below the expected output:

Summary

What have we done so far?

• Blablabla
  • Blablabla: …
  • Blablabla: …
• …

Conclusion

Webliography

• link_00

Next Steps

• Episode 00: Introduction + Step 00 - First prototype working
• Episode 01: Step 01 - Split the source code in multiple files
• Episode 02: Step 02 - Add a test folder
• Episode 03: Step 03 - Implement Hexagonal Architecture
• Episode 04: Step 04 - One crate per component
• Episode 05: Step 05 - Anyhow & ThisError
• Episode 06: Step 06 - Add new adapters + Conclusion