zio.http.netty.CachedDateHeader.scala Maven / Gradle / Ivy
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package zio.http.netty
import java.time.{Clock, LocalDateTime, ZoneOffset}
import java.util.concurrent.locks.LockSupport
import zio.http.internal.DateEncoding
private object CachedDateHeader {
lazy val default: CachedDateHeader = new CachedDateHeader()
}
private final class CachedDateHeader(
clock: Clock = Clock.tickSeconds(ZoneOffset.UTC),
dateEncoding: DateEncoding = DateEncoding.default,
) {
private var _headerValue = renderDateHeaderValue(clock.millis())
{
val t = new Ticker
t.setDaemon(true)
t.setName(s"zio.http.netty.DateHeaderEncoder.Scheduler")
t.setPriority(Thread.MAX_PRIORITY)
t.start()
}
def get(): String = _headerValue
private final class Ticker extends Thread {
override def run(): Unit = {
val clock0 = clock
var currentMillis = clock0.millis()
while (!isInterrupted) {
LockSupport.parkUntil(currentMillis + 1000)
currentMillis = clock0.millis()
updateHeaderValue(currentMillis)
}
}
}
private def renderDateHeaderValue(epochMilli: Long): String = {
val dt = LocalDateTime
.ofEpochSecond(epochMilli / 1000L, 0, ZoneOffset.UTC)
.atZone(ZoneOffset.UTC)
dateEncoding.encodeDate(dt)
}
private def updateHeaderValue(epochMilli: Long): Unit =
_headerValue = renderDateHeaderValue(epochMilli)
}