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Duration utils in Kotlin
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val Int.nano: Duration | |
get() = ofNanos(this.toLong()) | |
val Int.nanos: Duration | |
get() = ofNanos(this.toLong()) | |
val Long.nano: Duration | |
get() = ofNanos(this) | |
val Long.nanos: Duration | |
get() = ofNanos(this) | |
val Int.milli: Duration | |
get() = ofMillis(this.toLong()) | |
val Int.millis: Duration | |
get() = ofMillis(this.toLong()) | |
val Long.milli: Duration | |
get() = ofMillis(this) | |
val Long.millis: Duration | |
get() = ofMillis(this) | |
val Int.second: Duration | |
get() = ofSeconds(this.toLong()) | |
val Int.seconds: Duration | |
get() = ofSeconds(this.toLong()) | |
val Long.second: Duration | |
get() = ofSeconds(this) | |
val Long.seconds: Duration | |
get() = ofSeconds(this) | |
val Int.minute: Duration | |
get() = ofMinutes(this.toLong()) | |
val Int.minutes: Duration | |
get() = ofMinutes(this.toLong()) | |
val Long.minute: Duration | |
get() = ofMinutes(this) | |
val Long.minutes: Duration | |
get() = ofMinutes(this) | |
private val unitLabels = listOf( | |
NANOS to "ns", | |
MICROS to "µs", | |
MILLIS to "ms", | |
SECONDS to "s", | |
MINUTES to "min", | |
HOURS to "h", | |
DAYS to " days", | |
MONTHS to " months", | |
YEARS to " years", | |
CENTURIES to " centuries", | |
FOREVER to " ∞" | |
) | |
fun Duration.humanize(depth: Int = 2): String { | |
require(depth > 0) { "Require a depth strictly positive" } | |
tailrec fun aux(depth: Int, duration: Duration, acc: String): String = | |
if (depth == 0 || duration.isZero) acc | |
else { | |
val (tu, unit) = unitLabels.lastOrNull() { (tu, _) -> | |
tu.duration < duration | |
} ?: unitLabels.last() | |
val value = duration.toNanos() / tu.duration.toNanos() | |
val rest = duration.toNanos() % tu.duration.toNanos() | |
aux(depth - 1, ofNanos(rest), if (acc.isEmpty()) "$value$unit" else "$acc $value$unit") | |
} | |
return aux(depth, this, "") | |
} | |
inline fun <T> elapsed(consumer: (Duration) -> Unit = { println("Took ${it.humanize()}") }, block: () -> T): T { | |
val start = System.nanoTime() | |
try { | |
return block() | |
} finally { | |
val duration = ofNanos(System.nanoTime() - start) | |
consumer(duration) | |
} | |
} |
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