com.blr19c.falowp.bot.system.cache.OnlyReadOnceReference.kt Maven / Gradle / Ivy

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FalowpBot system infrastructure

There is a newer version: 2.0.0-RC2

package com.blr19c.falowp.bot.system.cache

import kotlinx.coroutines.runBlocking
import kotlin.reflect.KProperty

/**
 * 仅能读取一次的数据
 */
class OnlyReadOnceReference(
    private val block: suspend () -> T,
) {
    private var firstCall = true

    @Synchronized
    operator fun getValue(thisRef: Any, property: KProperty<*>): T? {
        return if (firstCall) {
            firstCall = false
            runBlocking { block.invoke() }
        } else {
            null
        }
    }
}