Merge branch 'master' into new-block-api

.github/workflows/tests.yml

@@ -13,10 +13,11 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 11
+    - name: Set up JDK 16
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v2
       with:
-        java-version: 11
+        distribution: 'adopt'
+        java-version: 16
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Setup gradle cache

src/main/java/net/minestom/server/UpdateManager.java

@@ -15,6 +15,7 @@ import org.jetbrains.annotations.NotNull;
 import java.util.List;
 import java.util.Queue;
 import java.util.concurrent.*;
+import java.util.concurrent.locks.LockSupport;
 import java.util.function.Consumer;
 import java.util.function.LongConsumer;
 
@@ -25,9 +26,6 @@ import java.util.function.LongConsumer;
  */
 public final class UpdateManager {
 
-    private final ScheduledExecutorService updateExecutionService = Executors.newSingleThreadScheduledExecutor(r ->
-            new Thread(r, MinecraftServer.THREAD_NAME_TICK_SCHEDULER));
-
     private volatile boolean stopRequested;
 
     // TODO make configurable
@@ -49,13 +47,9 @@ public final class UpdateManager {
     protected void start() {
         final ConnectionManager connectionManager = MinecraftServer.getConnectionManager();
 
-        updateExecutionService.scheduleAtFixedRate(() -> {
+        new Thread(() -> {
+            while (!stopRequested) {
                 try {
-                if (stopRequested) {
-                    updateExecutionService.shutdown();
-                    return;
-                }
-
                     long currentTime = System.nanoTime();
                     final long tickStart = System.currentTimeMillis();
 
@@ -83,7 +77,6 @@ public final class UpdateManager {
                         final double tickTimeMs = tickTime / 1e6D;
                         final TickMonitor tickMonitor = new TickMonitor(tickTimeMs, acquisitionTimeMs);
                         this.tickMonitors.forEach(consumer -> consumer.accept(tickMonitor));
-
                         Acquirable.resetAcquiringTime();
                     }
 
@@ -93,10 +86,13 @@ public final class UpdateManager {
                             .map(player -> (NettyPlayerConnection) player.getPlayerConnection())
                             .forEach(NettyPlayerConnection::flush));
 
+                    // Disable thread until next tick
+                    LockSupport.parkNanos((long) ((MinecraftServer.TICK_MS * 1e6) - tickTime));
                 } catch (Exception e) {
                     MinecraftServer.getExceptionManager().handleException(e);
                 }
-        }, 0, MinecraftServer.TICK_MS, TimeUnit.MILLISECONDS);
+            }
+        }, MinecraftServer.THREAD_NAME_TICK_SCHEDULER).start();
     }
 
     /**

src/main/java/net/minestom/server/network/packet/server/play/ExplosionPacket.java

@@ -36,7 +36,7 @@ public class ExplosionPacket implements ServerPacket {
         y = reader.readFloat();
         z = reader.readFloat();
         radius = reader.readFloat();
-        int recordCount = reader.readInt() * 3;
+        int recordCount = reader.readVarInt() * 3;
         records = reader.readBytes(recordCount);
         playerMotionX = reader.readFloat();
         playerMotionY = reader.readFloat();

src/main/java/net/minestom/server/network/packet/server/play/MapDataPacket.java

@@ -73,12 +73,16 @@ public class MapDataPacket implements ComponentHoldingServerPacket {
         locked = reader.readBoolean();
         trackingPosition = reader.readBoolean();
 
+        if (trackingPosition) {
             int iconCount = reader.readVarInt();
             icons = new Icon[iconCount];
             for (int i = 0; i < iconCount; i++) {
                 icons[i] = new Icon();
                 icons[i].read(reader);
             }
+        } else {
+            icons = new Icon[0];
+        }
 
         columns = reader.readByte();
         if (columns <= 0) {