What will the updated Redis schema with timeout-worker for time-limited games look like?

For time-limited games in Redis, a scheme with keys that automatically expire (TTL) and a separate worker that monitors expiration and handles timeouts can be used.

The updated scheme might look like this:

• A key with a unique ID is created for each game session and a TTL equal to the time limit is set.
• The worker subscribes to key expiration events (using Redis Keyspace Notifications).
• When a key expires, the worker receives a notification and executes the game-ending logic (e.g., determines the winner, updates statistics).

Example of setting a TTL key in Go:

err := redisClient.Set(ctx, "game:session:12345", "active", time.Minute*5).Err()
if err != nil {
    // handle error
}

The worker listens for expiration events:

pubsub := redisClient.PSubscribe(ctx, "__keyevent@0__:expired")
for msg := range pubsub.Channel() {
    if strings.HasPrefix(msg.Payload, "game:session:") {
        sessionID := strings.TrimPrefix(msg.Payload, "game:session:")
        // handle session timeout for sessionID
    }
}

This approach allows efficient management of game times and reacting to timeouts without constant polling.