Struct NullHandler 

pub struct NullHandler;

Discards every event. Zero-overhead substitute when monitoring is disabled in a release build.

Trait Implementations

impl Clone for NullHandler

fn clone(&self) -> NullHandler

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for NullHandler

impl Debug for NullHandler

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for NullHandler

fn default() -> NullHandler

Returns the “default value” for a type.

impl WatermarkHandler for NullHandler

fn on_warn(&self, _event: WatermarkEvent)

Called once per crossing of the warn_pct threshold (rising edge).

fn on_critical(&self, _event: WatermarkEvent)

Called once per crossing of the critical_pct threshold (rising edge).

fn on_oom(&self, _event: WatermarkEvent)

Called when an allocation returns AllocError.