RoomPicker

Simple matchmaking system and load balancer.

Features:

• Simple to use. Everything works out of the box.
• 3 picking methods (Sequential filling, Round Robin, Least picked).
• Optional control panel.
• Collecting metrics using Prometheus integration (ready Grafana dashboard).

This project is under development. Do not use in production!

How to use

First you need start RoomPicker Server and then you can start RoomPicker Control Panel (if you need). After that, you can connect to the server using RoomPicker Client.

Example of using the RoomPicker Client

Create a Node and a Room, after that, system pick up a room for 5 entities.

class Example {
    public static void main(String[] args) {
        var client = new RoomPickerClient(
                "http://dragonestia.ru:8080",
                "admin",
                "qwerty123"
        );

        // Creating instance
        var nodeId = NodeIdentifier.of("test-instance");
        var nodeDefinition = new NodeDefinition(nodeId)
                .setPickingMethod(PickingMethod.LEAST_PICKED);
        client.getNodeRepository().saveNode(nodeDefinition);

        // Creating room
        var roomId = RoomIdentifier.of("test-room");
        var roomDefinition = new RoomDefinition(nodeId, roomId)
                .setMaxSlots(10)
                .setPayload("Hello world!");
        client.getRoomRepository().saveRoom(roomDefinition);

        // Picking room for 5 entities
        var entities = new HashSet<UserIdentifier>();
        for (int i = 0 ; i < 5; i++) {
            var entity = UserIdentifier.of("test-entity-" + i);
            entities.add(entity);
        }
        try {
            var response = client.getNodeRepository().pickRoom(nodeId, entities);
            // TODO...
        } catch (NoRoomsAvailableException ex) {
            // Cannot pick room
        }
    }
}

Stress testing

If you want to stress test the server, you can run the script from the noiser module. Before starting stress testing, you'd better run Prometheus and Grafana from docker-compose.yml. In Grafana, you can see this view: