| app | ||
| catalogue | ||
| src | ||
| test/spec | ||
| .ghci | ||
| .gitignore | ||
| astro.db | ||
| LICENSE | ||
| meteor_counter.cfg | ||
| Notes.md | ||
| package.yaml | ||
| perf_test_app.cfg | ||
| README.md | ||
| Setup.hs | ||
| stack.yaml | ||
| test.db | ||
Hydra Framework
An all-in-one framework for writing Haskell apps which use the following features out of the box:
- Multithreading
- Safe STM-powered concurrency
- KV DB functionality (Redis & RocksDB backends supported)
- SQL DB functionality (beam incorporated, SQLite supported, PG & MySQL possible)
- Logging
- Random data generation
- Many others
With the framework, you can create complex applications that have a good maintainability, testability, simplicity, that have a good structure and are easy to read and change. The key principles in the framework:
- Layered architecture
- Separation of Subsystem Interfaces, Business Logic, Runtime and Implementation
- Convenient and simple to use eDSLs for Business Logic
- Layered structure of business application: State, Domain, Business Logic
The Hydra Project
This project demonstrates the principles of Software Design and Architecture in pure Functional Programming. It provides a framework implemented with several different approaches for easy comparison:
- Final Tagless
- Free Monad
- Church Encoded Free Monad
The project is a showcase for my book Functional Design and Architecture. The approaches presented in Hydra are well-described and rationalized in the book, so you may obtain even more info about best practices and ideas of how to write a good Haskell code.
Sample applications
There are 3 sample applications:
- Astro app: web server (with servant) and CLI client tool which allows to track meteors (tool for astronomers).
- PerfTestApp: an application you can run to measure the performance of the three engines.
- MeteorCounter: application which demonstrates the usage of STM and multithreading using three engines.
Additional materials describing these ideas: