Enum StateBackendDurability 

pub enum StateBackendDurability {
    Volatile,
    NodeDurable,
    ClusterShared,
}

Failure scope survived by a state backend.

The variants are ordered by strength so admission can require a minimum scope without collapsing node-local persistence and cluster-shared storage into the same boolean.

Variants

Volatile

State is lost when the current process exits.

NodeDurable

State survives a process restart on the same node, but peers are not guaranteed to be able to read it after that node fails.

ClusterShared

State is durably stored in a namespace reachable by every cluster node.

Implementations

impl StateBackendDurability

pub fn satisfies(self, required: Self) -> bool

Whether this scope is at least as strong as required.

pub fn for_storage_url(url: &str) -> Self

Classify a filesystem/object-store URL by the failure domain it can survive. Unknown and process-local schemes fail closed as volatile.

Trait Implementations

impl Clone for StateBackendDurability

fn clone(&self) -> StateBackendDurability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for StateBackendDurability

impl Debug for StateBackendDurability

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

Formats the value using the given formatter.

impl Eq for StateBackendDurability

impl Hash for StateBackendDurability

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

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 StateBackendDurability

fn cmp(&self, other: &StateBackendDurability) -> 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.

impl PartialEq for StateBackendDurability

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for StateBackendDurability

fn partial_cmp(&self, other: &StateBackendDurability) -> 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 StateBackendDurability