Optimize stuff

src/main/java/land/chipmunk/chipmunkbot/Client.java

@@ -61,14 +61,17 @@ public class Client {
 
         if (reconnectDelay < 0) return;
 
+        Timer timer = new Timer();
         TimerTask task = new TimerTask() {
           @Override
           public void run () {
             reconnect();
+
+            timer.purge();
           }
         };
 
-        new Timer().schedule(task, reconnectDelay);
+        timer.schedule(task, reconnectDelay);
       }
     });
 

src/main/java/land/chipmunk/chipmunkbot/plugins/CommandCore.java

@@ -157,14 +157,17 @@ public class CommandCore extends SessionAdapter {
 
     CompletableFuture<CompoundTag> future = new CompletableFuture<CompoundTag>();
 
+    final Timer timer = new Timer();
     final TimerTask queryTask = new TimerTask() {
       public void run () {
         client.query().block(currentBlock)
           .thenApply(tag -> { future.complete(tag); return tag; });
+
+        timer.purge();
       }
     };
 
-    new Timer().schedule(queryTask, 50);
+    timer.schedule(queryTask, 50);
 
     return future;
   }

src/main/java/land/chipmunk/chipmunkbot/plugins/QueryPlugin.java

@@ -50,6 +50,9 @@ public class QueryPlugin extends SessionAdapter {
   }
 
   public void packetReceived (Session session, ClientboundTagQueryPacket packet) {
-    transactions.get(packet.getTransactionId()).complete(packet.getNbt());
+    final CompletableFuture<CompoundTag> future = transactions.get(packet.getTransactionId());
+    if (future == null) return;
+    future.complete(packet.getNbt());
+    transactions.remove(future);
   }
 }

src/main/java/land/chipmunk/chipmunkbot/plugins/TabCompletePlugin.java

@@ -38,6 +38,9 @@ public class TabCompletePlugin extends SessionAdapter {
   }
 
   public void packetReceived (Session session, ClientboundCommandSuggestionsPacket packet) {
-    transactions.get(packet.getTransactionId()).complete(packet);
+    final CompletableFuture<ClientboundCommandSuggestionsPacket> future = transactions.get(packet.getTransactionId());
+    if (future == null) return;
+    future.complete(packet);
+    transactions.remove(future);
   }
 }