32 lines
919 B
Kotlin
32 lines
919 B
Kotlin
/*
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* TimeLimitedCache.kt
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* Copyright (C) 2009-2021 Ultrasonic developers
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*
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* Distributed under terms of the GNU GPLv3 license.
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*/
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package org.moire.ultrasonic.util
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import java.lang.ref.SoftReference
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import java.util.concurrent.TimeUnit
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class TimeLimitedCache<T>(expiresAfter: Long = 60L, timeUnit: TimeUnit = TimeUnit.MINUTES) {
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private var value: SoftReference<T>? = null
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private val expiresMillis: Long = TimeUnit.MILLISECONDS.convert(expiresAfter, timeUnit)
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private var expires: Long = 0
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fun get(): T? {
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return if (System.currentTimeMillis() < expires) value!!.get() else null
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}
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@JvmOverloads
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fun set(value: T, ttl: Long = expiresMillis, timeUnit: TimeUnit = TimeUnit.MILLISECONDS) {
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this.value = SoftReference(value)
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expires = System.currentTimeMillis() + timeUnit.toMillis(ttl)
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}
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fun clear() {
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expires = 0L
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value = null
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}
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}
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