9 Server setup

TheMode edited this page 2020-09-12 22:13:22 +02:00

Some things are needed before being able to connect to your Minestom server.

• Initialize the server
• Registering events/commands
• Optional: create a ResponseDataConsumer (can be specified in the start() method)
• Start the server at the specified port and address

Here is a correct example:

    public static void main(String[] args) {
        // Initialize the server
        MinecraftServer minecraftServer = MinecraftServer.init();

        // REGISTER EVENTS (set spawn instance, teleport player at spawn)

        // Start the server
        minecraftServer.start("localhost", 55555);
    }

However even after those steps, you will not be able to connect, what we miss here is an instance (the world)

Please check the instances and events pages if you have any question of how to create/listen to one

player.addEventCallback(PlayerLoginEvent.class, event -> {
   event.setSpawningInstance(YOUR_SPAWNING_INSTANCE);
});

Here is an example of a working Minestom server

package your.package;

import net.minestom.server.MinecraftServer;
import net.minestom.server.event.player.PlayerLoginEvent;
import net.minestom.server.event.player.PlayerSpawnEvent;
import net.minestom.server.instance.*;
import net.minestom.server.instance.batch.ChunkBatch;
import net.minestom.server.instance.block.Block;
import net.minestom.server.network.ConnectionManager;
import net.minestom.server.utils.Position;

import java.util.Arrays;
import java.util.List;

public class MainDemo {

    public static void main(String[] args) {
        // Initialization
        MinecraftServer minecraftServer = MinecraftServer.init();

        InstanceManager instanceManager = MinecraftServer.getInstanceManager();
        // Create the instance
        InstanceContainer instanceContainer = instanceManager.createInstanceContainer();
        // Set the ChunkGenerator
        instanceContainer.setChunkGenerator(new GeneratorDemo());
        // Enable the auto chunk loading (when players come close)
        instanceContainer.enableAutoChunkLoad(true);

        // Add event listeners
        ConnectionManager connectionManager = MinecraftServer.getConnectionManager();
        connectionManager.addPlayerInitialization(player -> {
            // Set the spawning instance
            player.addEventCallback(PlayerLoginEvent.class, event -> {
                event.setSpawningInstance(instanceContainer);
            });

            // Teleport the player at spawn
            player.addEventCallback(PlayerSpawnEvent.class, event -> {
                player.teleport(new Position(0, 45, 0));
            });
        });

        // Start the server
        minecraftServer.start("localhost", 55555);
    }

    private static class GeneratorDemo implements ChunkGenerator {

        @Override
        public void generateChunkData(ChunkBatch batch, int chunkX, int chunkZ) {
            // Set chunk blocks
            for (byte x = 0; x < Chunk.CHUNK_SIZE_X; x++)
                for (byte z = 0; z < Chunk.CHUNK_SIZE_Z; z++) {
                    for (byte y = 0; y < 40; y++) {
                        batch.setBlock(x, y, z, Block.STONE);
                    }
                }
        }

        @Override
        public void fillBiomes(Biome[] biomes, int chunkX, int chunkZ) {
            Arrays.fill(biomes, Biome.PLAINS);
        }

        @Override
        public List<ChunkPopulator> getPopulators() {
            return null;
        }
    }

}