scala.util.control

NonFatal

object NonFatal

Extractor of non-fatal Throwables. Will not match fatal errors like VirtualMachineError (for example, OutOfMemoryError and StackOverflowError, subclasses of VirtualMachineError), ThreadDeath, LinkageError, InterruptedException, ControlThrowable.

Note that scala.util.control.ControlThrowable, an internal Throwable, is not matched by NonFatal (and would therefore be thrown).

For example, all harmless Throwables can be caught by:

try {
  // dangerous stuff
} catch {
  case NonFatal(e) => log.error(e, "Something not that bad.")
 // or
  case e if NonFatal(e) => log.error(e, "Something not that bad.")
}
Source
NonFatal.scala
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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. def apply(t: Throwable): Boolean

    Returns true if the provided Throwable is to be considered non-fatal, or false if it is to be considered fatal

  5. final def asInstanceOf[T0]: T0

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  6. def clone(): AnyRef

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  9. def finalize(): Unit

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  10. final def getClass(): Class[_]

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  11. def hashCode(): Int

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  12. final def isInstanceOf[T0]: Boolean

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  13. final def ne(arg0: AnyRef): Boolean

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  14. final def notify(): Unit

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  15. final def notifyAll(): Unit

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  17. def toString(): String

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  18. def unapply(t: Throwable): Option[Throwable]

    Returns Some(t) if NonFatal(t) == true, otherwise None

  19. final def wait(): Unit

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  20. final def wait(arg0: Long, arg1: Int): Unit

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