65 lines
2.1 KiB
Kotlin
Executable File
65 lines
2.1 KiB
Kotlin
Executable File
/*
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* Copyright 2020 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.objectPool.nonBlocking
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import dorkbox.objectPool.BoundedPoolObject
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import dorkbox.objectPool.ObjectPool
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import java.util.*
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import java.util.concurrent.atomic.*
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/**
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* A non-blocking pool which will create as many objects as much as needed but will only store maxSize in the pool.
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* If the pool is empty, new objects will be created.
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*
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* The items added to pool will never expire or be automatically garbage collected.
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* The items not added back to the pool will be garbage collected
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*
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* See [ObjectPool.nonBlockingSoftReference] for pooled objects that will expire/GC as needed
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*
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* @author dorkbox, llc; Abinav Janakiraman
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*/
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internal class BoundedNonBlockingPool<T>(
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private val poolObject: BoundedPoolObject<T>,
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private val maxSize: Int,
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private val queue: Queue<T>) : NonBlockingPool<T>(poolObject, queue) {
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private val currentSize: AtomicLong = AtomicLong(0)
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/**
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* Return object to the pool, waking the threads that have blocked during take()
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* If current pool size is larger than max size, don't add object back into the pool
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*/
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override fun put(`object`: T) {
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if (currentSize.get() <= maxSize) {
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poolObject.onReturn(`object`)
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queue.offer(`object`)
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} else {
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currentSize.decrementAndGet()
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poolObject.onRemove(`object`)
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}
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}
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/**
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* @return a new object instance created by the pool.
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*/
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override fun newInstance(): T {
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currentSize.incrementAndGet()
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return poolObject.newInstance()
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}
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}
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