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