fibo_socketio's Introduction

SocketIO Fibonacci Server

This simple server given integer n will calculate the nth Fibonacci number. Since this calculation can take significant time, the task is passed to a queue and ran by a worker, so it does no hang the server process. The task and the results are stored in a redis db. The components are separated into three docker containers which are orchestrated by docker compose.

Advantages:

the services are separated, so even if the server or worker go down, existing tasks and results are kept
the started tasks and previously calculated results are kept (for a day) so these results can be returned immediately for new queries
if a second client asks for a calculation that has already been started, no new task will be created and the result will be provided once it is complete

Prequisites

git
docker
python-socketio (for the client: pip install python-socketio)
websocket-client (for websocket connection and not just polling: pip install websocket-client)

Installation

download or clone this repository from github: git clone https://github.com/Asimoved/fibo_socketio.git
from the main directory run: docker compose up -d
- docker will download the official redis image, build the app and worker images from their respective directories

Usage

You can immediately test from the command line with: python client.py 1 (or: python3 client.py 1)

The client will attempt to connect to the server, then send the integer and wait for the result.
It will let you know in 3 second intervals that it's still working.
If the connection is broken (you can simulate this by stopping the app container), the client will attempt to reconnect.
When reconnected the client will keep waiting if the calculation is not yet complete, or return the result if it's already available.

Recommend Projects