jobobby04
25 lines
559 B
Kotlin
25 lines
559 B
Kotlin
package exh.util
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import kotlinx.coroutines.sync.Mutex
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import kotlinx.coroutines.sync.withLock
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class CachedField<T>(private val expiresAfterMs: Long) {
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@Volatile
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private var initTime: Long = -1
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@Volatile
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private var content: T? = null
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private val mutex = Mutex()
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suspend fun obtain(producer: suspend () -> T): T {
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return mutex.withLock {
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if (initTime < 0 || System.currentTimeMillis() - initTime > expiresAfterMs) {
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content = producer()
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}
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content as T
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}
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}
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}
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