Enum Level 

pub enum Level {
    InMemory,
    Persisted,
}

Durability level a single node can be at for a given sequence.

Ordered from weakest to strongest — Persisted >= InMemory always holds for any given cursor pair on a single node, since persisting is downstream of receiving in the pipeline. The Ord derive reflects this and lets evaluation code treat a higher-level cursor as also satisfying any lower-level requirement on the same node.

Variants

InMemory

Event has been accepted into the node’s pipeline. No durability guarantee — process crash or power loss loses it.

Persisted

Event has been written to the journal and fdatasync has returned. Survives power loss on any drive — the guarantee rests on the sync, not on the device’s power-loss-protection capacitors. Published by the journal disk thread only after the sync completes.

Implementations

impl Level

pub fn as_str(self) -> &'static str

Stable lowercase name used in policy strings ("in_memory", "persisted").

Trait Implementations

impl Clone for Level

fn clone(&self) -> Level

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Level

impl Debug for Level

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

Formats the value using the given formatter.

impl Display for Level

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

Formats the value using the given formatter.

impl Eq for Level

impl Hash for Level

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Level

fn cmp(&self, other: &Level) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Level

fn eq(&self, other: &Level) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for Level

fn partial_cmp(&self, other: &Level) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Level