From d47598b680c174abd7021e7857452886e09f4346 Mon Sep 17 00:00:00 2001 From: vemacs Date: Wed, 23 Nov 2016 12:53:43 -0500 Subject: [PATCH] Misc Utils diff --git a/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java b/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java new file mode 100644 index 00000000..5bb677ce --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/utils/CachedSizeConcurrentLinkedQueue.java @@ -0,0 +1,34 @@ +package com.destroystokyo.paper.utils; + +import java.util.concurrent.ConcurrentLinkedQueue; +import java.util.concurrent.atomic.LongAdder; +import org.jetbrains.annotations.NotNull; +import org.jetbrains.annotations.Nullable; + +public class CachedSizeConcurrentLinkedQueue extends ConcurrentLinkedQueue { + private final LongAdder cachedSize = new LongAdder(); + + @Override + public boolean add(@NotNull E e) { + boolean result = super.add(e); + if (result) { + cachedSize.increment(); + } + return result; + } + + @Nullable + @Override + public E poll() { + E result = super.poll(); + if (result != null) { + cachedSize.decrement(); + } + return result; + } + + @Override + public int size() { + return cachedSize.intValue(); + } +} -- 2.21.0