chorus

Step 1 - Create the MVP which is a single server, no other tools that allows users to connect and get put in a lobby that is managed by a javascript. That script can then do matchmaking to put you in a tic-tac-toe game, a room managed by another javascript.

This works well enough.

Step 2 - Route everything through RedPanda/Kafka. How does this change things

• Create an EndUser server that let's users connect and provides access to the system.
  • Whe a user connects they join the GlobalLobby
    • To Join a Room
      • A record keyed by the roomid is updated to have the connection id
      • We start consuming the rooomid topic

I've played around with this a bit and it changes the design significantly, as expected.

Step 3 - Switched to using Redis and this had other issues. I did have fun making distributed data structures.

Step 4 - Now another set of changes - Postgres for persistance - RedPanda For sending messages

What are our major structures: - Machines - End User Server - Accepts connections from users - Default joins Global Lobby - Room Server - runs room logic - User Connections - This object connects to a user talking into the system and handles all communication - Room - Attached to a script context for room logic - Has users joined to it - Monitor - single machine in the cluster that orchestrates things

We use Postgres to store state, this includes - Current connections - Room Memberships - Machine status

We use RedPanda to send messages between machines - Room Channels - each room has a channel - all room events go through this channel - Machine Channels - each machine has a channel - join - tells a user/connection to join a room - leave - tells a suer/connection to leave a room

What do we need to do? done - Postgres docker instance done - scripts for creating DB - Postgres library - Kafka library