Struct ClusterStartupEpoch

pub struct ClusterStartupEpoch {
    envd: NonZeroI64,
    replica: u64,
}

A value generated by environmentd and passed to the clusterd processes to help them disambiguate different CreateTimely commands.

The semantics of this value are not important, except that they must be totally ordered, and any value (for a given replica) must be greater than any that were generated before (for that replica). This is the reason for having two components (one from the catalog storage that increases on every environmentd restart, another in-memory and local to the current incarnation of environmentd)

Fields

envd: NonZeroI64

The environment incarnation.

replica: u64

The replica incarnation.

Implementations

impl ClusterStartupEpoch

pub fn bump_replica(&mut self)

Increases the replica incarnation counter.

impl ClusterStartupEpoch

pub fn new(envd: NonZeroI64, replica: u64) -> Self

Construct a new cluster startup epoch, from the environment epoch and replica incarnation.

pub fn to_bytes(&self) -> [u8; 16]

Serialize for transfer over the network

pub fn from_bytes(bytes: [u8; 16]) -> Self

Inverse of to_bytes

pub fn envd(&self) -> NonZeroI64

The environment epoch.

pub fn replica(&self) -> u64

The replica incarnation.

Trait Implementations

impl Arbitrary for ClusterStartupEpoch

type Strategy = BoxedStrategy<ClusterStartupEpoch>

The type of Strategy used to generate values of type Self.

type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

fn arbitrary_with(_: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self).

impl Clone for ClusterStartupEpoch

fn clone(&self) -> ClusterStartupEpoch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ClusterStartupEpoch

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ClusterStartupEpoch

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ClusterStartupEpoch

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

Formats the value using the given formatter.

impl Ord for ClusterStartupEpoch

fn cmp(&self, other: &Self) -> 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 ClusterStartupEpoch

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ClusterStartupEpoch

fn partial_cmp(&self, other: &Self) -> 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 RustType<ProtoClusterStartupEpoch> for ClusterStartupEpoch

fn into_proto(&self) -> ProtoClusterStartupEpoch

Convert a Self into a Proto value.

fn from_proto( proto: ProtoClusterStartupEpoch, ) -> Result<Self, TryFromProtoError>

Consume and convert a Proto back into a Self value.

fn into_proto_owned(self) -> Proto

A zero clone version of Self::into_proto that types can optionally implement, otherwise, the default implementation delegates to Self::into_proto.

impl Serialize for ClusterStartupEpoch

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ClusterStartupEpoch

impl Eq for ClusterStartupEpoch

impl StructuralPartialEq for ClusterStartupEpoch