Fix /geyser reload on Velocity (#4258)

* Fix /geyser reload on Velocity 

* No need to create/init a new injector on Velocity

* No need to warn about "abnormally long startup" on Bungee when we're reloading. And, as on velocity, no need to re-inject

bootstrap/bungeecord/src/main/java/org/geysermc/geyser/platform/bungeecord/GeyserBungeePlugin.java

@@ -70,6 +70,8 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
 
     private GeyserImpl geyser;
 
+    private static boolean INITIALIZED = false;
+
     @Override
     public void onLoad() {
         GeyserLocale.init(this);
@@ -133,7 +135,12 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
         // Big hack - Bungee does not provide us an event to listen to, so schedule a repeating
         // task that waits for a field to be filled which is set after the plugin enable
         // process is complete
+        if (!INITIALIZED) {
             this.awaitStartupCompletion(0);
+        } else {
+            // No need to "wait" for startup completion, just start Geyser - we're reloading.
+            this.postStartup();
+        }
     }
 
     @SuppressWarnings("unchecked")
@@ -166,8 +173,10 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
     private void postStartup() {
         GeyserImpl.start();
 
+        if (!INITIALIZED) {
             this.geyserInjector = new GeyserBungeeInjector(this);
             this.geyserInjector.initializeLocalChannel(this);
+        }
 
         this.geyserCommandManager = new GeyserCommandManager(geyser);
         this.geyserCommandManager.init();
@@ -187,6 +196,8 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
         } else {
             this.geyserBungeePingPassthrough = new GeyserBungeePingPassthrough(getProxy());
         }
+
+        INITIALIZED = true;
     }
 
     @Override

bootstrap/velocity/src/main/java/org/geysermc/geyser/platform/velocity/GeyserVelocityPlugin.java

@@ -64,6 +64,11 @@ import java.util.UUID;
 @Plugin(id = "geyser", name = GeyserImpl.NAME + "-Velocity", version = GeyserImpl.VERSION, url = "https://geysermc.org", authors = "GeyserMC")
 public class GeyserVelocityPlugin implements GeyserBootstrap {
 
+    /**
+     * Determines if the plugin has been ran once before, including before /geyser reload.
+     */
+    private static boolean INITIALIZED = false;
+
     @Inject
     private Logger logger;
 
@@ -114,13 +119,20 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
         GeyserConfiguration.checkGeyserConfiguration(geyserConfig, geyserLogger);
 
         this.geyser = GeyserImpl.load(PlatformType.VELOCITY, this);
+
+        // Hack: Normally triggered by ListenerBoundEvent, but that doesn't fire on /geyser reload
+        if (INITIALIZED) {
+            this.postStartup();
+        }
     }
 
     private void postStartup() {
         GeyserImpl.start();
 
+        if (!INITIALIZED) {
             this.geyserInjector = new GeyserVelocityInjector(proxyServer);
             // Will be initialized after the proxy has been bound
+        }
 
         this.geyserCommandManager = new GeyserCommandManager(geyser);
         this.geyserCommandManager.init();
@@ -195,6 +207,8 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
                 geyserInjector.initializeLocalChannel(this);
             }
         }
+
+        INITIALIZED = true;
     }
 
     @Override