scorex.utils.utils.scala Maven / Gradle / Ivy
package scorex
import java.security.SecureRandom
import scala.annotation.tailrec
import scala.concurrent.duration._
import scala.reflect.runtime.universe
import scala.util._
package object utils {
@tailrec
final def untilTimeout[T](timeout: FiniteDuration,
delay: FiniteDuration = 100.milliseconds,
onFailure: => Unit = {})(fn: => T): T = {
Try {
fn
} match {
case Success(x) => x
case _ if timeout > delay =>
Thread.sleep(delay.toMillis)
untilTimeout(timeout - delay, delay, onFailure)(fn)
case Failure(e) =>
onFailure
throw e
}
}
def randomBytes(howMany: Int = 32): Array[Byte] = {
val r = new Array[Byte](howMany)
new SecureRandom().nextBytes(r) //overrides r
r
}
def objectFromString[T](fullClassName: String): Try[T] = Try {
val runtimeMirror = universe.runtimeMirror(getClass.getClassLoader)
val module = runtimeMirror.staticModule(fullClassName)
val obj = runtimeMirror.reflectModule(module)
obj.instance.asInstanceOf[T]
}
}