Struct CheckpointId 

pub struct CheckpointId {
    pub end_offset: u64,
    pub epoch: u64,
}

The identity of a metadata checkpoint, as its file name encodes it.

The derived order is the checkpoint order: end offset first, then epoch.

Fields

end_offset: u64

The offset the checkpoint ends at.

epoch: u64

The epoch of the controller that wrote it.

Implementations

impl CheckpointId

pub const fn is_format_time(self) -> bool

Whether this is the checkpoint krabka format writes, at end offset zero.

A plain format puts the bootstrap records only in it, and never a topic. A format that krabka-restore runs also seeds the restored topics into it, so holds_a_topic tells the two apart. The controller writes its first checkpoint past it only after metadata_max_snapshot_interval, or once enough metadata is committed, so until then it is the newest checkpoint on the node.

Trait Implementations

impl Clone for CheckpointId

fn clone(&self) -> CheckpointId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CheckpointId

impl Debug for CheckpointId

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

Formats the value using the given formatter.

impl Eq for CheckpointId

impl Ord for CheckpointId

fn cmp(&self, other: &CheckpointId) -> 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 CheckpointId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for CheckpointId

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