Struct CheckpointAttempt 

pub struct CheckpointAttempt {
    pub epoch: u64,
    pub checkpoint_id: u64,
}

Exact identity of one checkpoint attempt.

Runtime-generated and persisted attempts use one durable order: epoch == checkpoint_id. The duplicated fields remain in the current wire/storage layout and are validated at every boundary.

Fields

epoch: u64

Logical pipeline epoch represented by this checkpoint.

checkpoint_id: u64

Globally unique, never-reused checkpoint attempt ID.

Implementations

impl CheckpointAttempt

pub const fn new(epoch: u64, checkpoint_id: u64) -> Self

Construct an exact checkpoint attempt identity.

pub const fn canonical(checkpoint_id: u64) -> Self

Construct a runtime attempt from the single durable checkpoint order.

pub const fn is_canonical(self) -> bool

Whether both persisted fields represent the same durable checkpoint identity.

pub const fn relation_to(self, other: Self) -> CheckpointAttemptRelation

Relate this attempt to other without inventing a lexicographic order.

Trait Implementations

impl Archive for CheckpointAttempt

where u64: Archive,

const COPY_OPTIMIZATION: CopyOptimization<Self>

An optimization flag that allows the bytes of this type to be copied directly to a writer instead of calling serialize.

type Archived = ArchivedCheckpointAttempt

The archived representation of this type.

type Resolver = CheckpointAttemptResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

fn resolve(&self, resolver: Self::Resolver, out: Place<Self::Archived>)

Creates the archived version of this value at the given position and writes it to the given output.

impl Clone for CheckpointAttempt

fn clone(&self) -> CheckpointAttempt

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CheckpointAttempt

impl Debug for CheckpointAttempt

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CheckpointAttempt

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<__D: Fallible + ?Sized> Deserialize<CheckpointAttempt, __D> for Archived<CheckpointAttempt>

where u64: Archive, <u64 as Archive>::Archived: Deserialize<u64, __D>,

fn deserialize( &self, deserializer: &mut __D, ) -> Result<CheckpointAttempt, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl Eq for CheckpointAttempt

impl Hash for CheckpointAttempt

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 PartialEq for CheckpointAttempt

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for CheckpointAttempt

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<__S: Fallible + ?Sized> Serialize<__S> for CheckpointAttempt

where u64: Serialize<__S>,

fn serialize( &self, serializer: &mut __S, ) -> Result<<Self as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl StructuralPartialEq for CheckpointAttempt