Enum mz_persist_client::internal::paths::WriterKey

pub enum WriterKey {
    Id(WriterId),
    Version(String),
}

A component that provides information about the writer of a blob. For older blobs, this is a UUID for the specific writer instance; for newer blobs, this is a string representing the version at which the blob was written. In either case, it’s used to help determine whether a blob may eventually be linked into state, or whether it’s junk that we can clean up. Note that the ordering is meaningful: all writer-id keys are considered smaller than all version keys.

Variants

Id(WriterId)

Version(String)

Implementations

impl WriterKey

pub fn for_version(version: &Version) -> WriterKey

This uses the version numbering scheme specified in mz_build_info::BuildInfo::version_num. (And asserts that the version isn’t so large that that scheme is no longer sufficient.)

Trait Implementations

impl Clone for WriterKey

fn clone(&self) -> WriterKey

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WriterKey

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

Formats the value using the given formatter.

impl Display for WriterKey

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

Formats the value using the given formatter.

impl FromStr for WriterKey

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Ord for WriterKey

fn cmp(&self, other: &WriterKey) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for WriterKey

fn eq(&self, other: &WriterKey) -> 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 WriterKey

fn partial_cmp(&self, other: &WriterKey) -> 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 Eq for WriterKey

impl StructuralPartialEq for WriterKey