README.md

Live Qchatex

Open sourced web application done by Fiqus for educational and experimental purposes.

The idea was to research and practice about Phoenix LiveView implementation and to play around a little with Phoenix PubSub + Presence for sockets, using Memento as Elixir wrapper to Erlang Mnesia for data storage.
Added clustering support by using libcluster, allowing Phoenix and Mnesia to work as distributed servers.

Live Qchatex is a very simple and quick chat engine that allows you to create and join chat rooms on-the-fly.
Don't need to register, just enter a nickname and you are ready to go!
NOTE: All chats, messages and users are automatically deleted after a certain period of inactivity.

App overview PDF: lqchatex-overview.pdf

Live running demo at: https://lqchatex.fiqus.coop/

Hosted by gigalixir.

Development

Pre-requisites

You will have to install:

• Elixir 1.9 or later
• Erlang/OTP 22 or later
• Node.js 12 or later

Start a single server

• Install dependencies with mix deps.get
• Install Node.js dependencies with cd assets && npm install
• Start Phoenix endpoint with mix phx.server

You can now visit http://localhost:4000 from your browser!

Mnesia reset data

• mix mnesia.reset - remove the mnesia storage directory from disk

Makefile

• make clean - remove mnesia data, _build/, priv/static/ and clean+unlock deps
• make test - run tests
• make server - run default server instance at [email protected] node accessible from http://localhost:4000
• make server1 - run additional server instance at [email protected] node accessible from http://localhost:4001
• make server2 - run additional server instance at [email protected] node accessible from http://localhost:4002
• make release - build prod release and run it at [email protected] node accessible from http://localhost:4004

Multiple server instances will connect to each other using libcluster with gossip topology!
You can try the cluster by running server, server1, server2 and release at the same time.