ProxyServer#broadcast()

api/src/main/java/com/velocitypowered/api/proxy/ProxyServer.java

@@ -8,6 +8,7 @@ import com.velocitypowered.api.proxy.messages.ChannelRegistrar;
 import com.velocitypowered.api.proxy.server.RegisteredServer;
 import com.velocitypowered.api.proxy.server.ServerInfo;
 import com.velocitypowered.api.scheduler.Scheduler;
+import net.kyori.text.Component;
 
 import java.net.InetSocketAddress;
 import java.util.Collection;
@@ -32,6 +33,12 @@ public interface ProxyServer {
      */
     Optional<Player> getPlayer(UUID uuid);
 
+    /**
+     * Broadcasts a message to all players currently online.
+     * @param component the message to send
+     */
+    void broadcast(Component component);
+
     /**
      * Retrieves all players currently connected to this proxy. This call may or may not be a snapshot of all players
      * online.

proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java

@@ -26,6 +26,7 @@ import com.velocitypowered.proxy.network.ConnectionManager;
 import com.velocitypowered.proxy.network.http.NettyHttpClient;
 import com.velocitypowered.proxy.plugin.VelocityEventManager;
 import com.velocitypowered.proxy.plugin.VelocityPluginManager;
+import com.velocitypowered.proxy.protocol.packet.Chat;
 import com.velocitypowered.proxy.protocol.util.FaviconSerializer;
 import com.velocitypowered.proxy.scheduler.VelocityScheduler;
 import com.velocitypowered.proxy.server.ServerMap;
@@ -253,6 +254,14 @@ public class VelocityServer implements ProxyServer {
         return Optional.ofNullable(connectionsByUuid.get(uuid));
     }
 
+    @Override
+    public void broadcast(Component component) {
+        Chat chat = Chat.createClientbound(component);
+        for (ConnectedPlayer player : connectionsByUuid.values()) {
+            player.getConnection().write(chat);
+        }
+    }
+
     @Override
     public Collection<Player> getAllPlayers() {
         return ImmutableList.copyOf(connectionsByUuid.values());