I am happy to announce that we have completed the migration from C++ to Rust, and have released a stable version (v1.4.0) that is entirely written in Rust. 🤩
It was not an easy journey. After six weeks of coding, we encountered numerous regressions and changes in behavior. I needed to release two alpha and two beta versions with production testing to clean up the database. Now, it is finally ready!
This article provides an introduction to ReductStore and explains how to use the Reduct C++ SDK to subscribe to data from the database.
To subscribe to new records, we should use a continuous query, which has been supported by ReductStore since version v1.4. We can use the following Docker command to run it:
docker pull reduct/store:latest
docker run -p 8383:8383 reduct/store:latest
Now, we need to install the Reduct Client SDK for C++. Please refer to these instructions.
I previously wrote about my plan to rewrite ReductStore in Rust. I am happy to announce that the migration is now complete. It was a very interesting 6 weeks for me, and I would like to share my experience with you.
I wrote ReductStore in C++20, utilizing coroutines and ranges.
For the HTTP frontend, I used uWebSockets as an HTTP server and its event loop for coroutines.
The storage engine was implemented from scratch.
I used Protobuf as a JSON and binary serializer in both the HTTP frontend and the storage engine. Many of the structures were shared between the two.
I managed dependencies with Conan and used CMake as a build system.
Codebase about 20k lines with unit tests.
I have been developing in C++ and Python for about five years. Mostly, I write services for data acquisition, processing, and storage. I like OOP, design patterns, and my C++ smells Java. However, I avoid using exceptions and follow the RAII approach.
In Rust, I have only written the "Hello, World" example.
I work on the project in my spare time 10-20 hours a week.
Initially, I planned to use the cxx.rs library and rewrite the project in small steps by wrapping Rust code and integrating it into C++.
[SPOILER] I wasn't able to handle this...