Revert "Added CachedObject to access a single-object cache"

This reverts commit 1c39e06d

src/main/java/net/minestom/server/instance/DynamicChunk.java

@@ -16,7 +16,6 @@ import net.minestom.server.utils.BlockPosition;
 import net.minestom.server.utils.binary.BinaryReader;
 import net.minestom.server.utils.binary.BinaryWriter;
 import net.minestom.server.utils.block.CustomBlockUtils;
-import net.minestom.server.utils.cache.CachedObject;
 import net.minestom.server.utils.callback.OptionalCallback;
 import net.minestom.server.utils.chunk.ChunkCallback;
 import net.minestom.server.utils.chunk.ChunkUtils;
@@ -27,6 +26,7 @@ import net.minestom.server.world.biomes.Biome;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.lang.ref.SoftReference;
 import java.util.Set;
 
 /**
@@ -60,7 +60,8 @@ public class DynamicChunk extends Chunk {
 
     private long lastChangeTime;
 
-    private CachedObject<ChunkDataPacket> cachedPacket = new CachedObject<>();
+    private SoftReference<ChunkDataPacket> cachedPacket = new SoftReference<>(null);
+    private long cachedPacketTime;
 
     public DynamicChunk(@NotNull Instance instance, @Nullable Biome[] biomes, int chunkX, int chunkZ,
                         @NotNull PaletteStorage blockPalette, @NotNull PaletteStorage customBlockPalette) {
@@ -386,17 +387,22 @@ public class DynamicChunk extends Chunk {
     @NotNull
     @Override
     protected ChunkDataPacket createFreshPacket() {
-        return cachedPacket.getUpdatedCache(() -> {
-            ChunkDataPacket chunkDataPacket = new ChunkDataPacket(getIdentifier(), getLastChangeTime());
-            chunkDataPacket.biomes = biomes;
-            chunkDataPacket.chunkX = chunkX;
-            chunkDataPacket.chunkZ = chunkZ;
-            chunkDataPacket.paletteStorage = blockPalette.clone();
-            chunkDataPacket.customBlockPaletteStorage = customBlockPalette.clone();
-            chunkDataPacket.blockEntities = blockEntities.clone();
-            chunkDataPacket.blocksData = blocksData.clone();
-            return chunkDataPacket;
-        }, getLastChangeTime());
+        ChunkDataPacket packet = cachedPacket.get();
+        if (packet != null && cachedPacketTime == getLastChangeTime()) {
+            return packet;
+        }
+        packet = new ChunkDataPacket(getIdentifier(), getLastChangeTime());
+        packet.biomes = biomes;
+        packet.chunkX = chunkX;
+        packet.chunkZ = chunkZ;
+        packet.paletteStorage = blockPalette.clone();
+        packet.customBlockPaletteStorage = customBlockPalette.clone();
+        packet.blockEntities = blockEntities.clone();
+        packet.blocksData = blocksData.clone();
+
+        this.cachedPacketTime = getLastChangeTime();
+        this.cachedPacket = new SoftReference<>(packet);
+        return packet;
     }
 
     @NotNull

src/main/java/net/minestom/server/item/ItemMeta.java

@@ -6,7 +6,6 @@ import net.minestom.server.instance.block.Block;
 import net.minestom.server.item.attribute.ItemAttribute;
 import net.minestom.server.utils.binary.BinaryWriter;
 import net.minestom.server.utils.binary.Writeable;
-import net.minestom.server.utils.cache.CachedObject;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -34,8 +33,8 @@ public class ItemMeta implements Writeable {
     private final NBTCompound nbt;
     private final ItemMetaBuilder emptyBuilder;
 
-    private CachedObject<String> cachedSNBT = new CachedObject<>();
-    private CachedObject<ByteBuf> cachedBuffer = new CachedObject<>();
+    private String cachedSNBT;
+    private ByteBuf cachedBuffer;
 
     protected ItemMeta(@NotNull ItemMetaBuilder metaBuilder) {
         this.damage = metaBuilder.damage;
@@ -129,7 +128,10 @@ public class ItemMeta implements Writeable {
     }
 
     public @NotNull String toSNBT() {
-        return cachedSNBT.getCache(nbt::toSNBT);
+        if (cachedSNBT == null) {
+            this.cachedSNBT = nbt.toSNBT();
+        }
+        return cachedSNBT;
     }
 
     @Override
@@ -153,12 +155,12 @@ public class ItemMeta implements Writeable {
 
     @Override
     public synchronized void write(@NotNull BinaryWriter writer) {
-        final var buffer = cachedBuffer.getCache(() -> {
+        if (cachedBuffer == null) {
             BinaryWriter w = new BinaryWriter();
             w.writeNBT("", nbt);
-            return w.getBuffer();
-        });
-        writer.write(buffer);
-        buffer.resetReaderIndex();
+            this.cachedBuffer = w.getBuffer();
+        }
+        writer.write(cachedBuffer);
+        this.cachedBuffer.resetReaderIndex();
     }
 }

src/main/java/net/minestom/server/utils/cache/CachedObject.java

@@ -1,69 +0,0 @@
-package net.minestom.server.utils.cache;
-
-import com.google.common.annotations.Beta;
-import org.jetbrains.annotations.NotNull;
-
-import java.lang.ref.SoftReference;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.function.Supplier;
-
-/**
- * Represents a single that can be collected by the garbage collector
- * depending on memory demand.
- *
- * @param <T> the object to cache
- */
-@Beta
-public class CachedObject<T> extends SoftReference<AtomicReference<T>> {
-
-    private long cacheTime;
-
-    public CachedObject() {
-        super(new AtomicReference<>());
-    }
-
-    /**
-     * Retrieves the cache.
-     *
-     * @param supplier supplier for the value if absent
-     * @return the cache
-     */
-    public @NotNull T getCache(@NotNull Supplier<@NotNull T> supplier) {
-        var referent = get();
-        assert referent != null;
-        var value = referent.get();
-        if (value == null) {
-            value = supplier.get();
-            referent.set(value);
-        }
-        return value;
-    }
-
-    /**
-     * Retrieves the cache, and ensure that the value is up-to-date.
-     *
-     * @param supplier   supplier for the value if absent or outdated
-     * @param lastUpdate the required internal timestamp, supplier will be called otherwise
-     * @return the cache
-     */
-    public @NotNull T getUpdatedCache(@NotNull Supplier<@NotNull T> supplier, long lastUpdate) {
-        var referent = get();
-        assert referent != null;
-        var value = referent.get();
-        if (value == null || cacheTime != lastUpdate) {
-            value = supplier.get();
-            this.cacheTime = lastUpdate;
-            referent.set(value);
-        }
-        return value;
-    }
-
-    /**
-     * @deprecated use {@link #getCache(Supplier)}
-     */
-    @Override
-    @Deprecated
-    public AtomicReference<T> get() {
-        return super.get();
-    }
-}