Struct RunId 

pub struct RunId(/* private fields */);

Unique identifier for a pipeline run.

Format: YYYY-MM-DD_HH-mm-ss.SSSZ[-NN] where NN is an optional collision counter (01, 02, etc.)

The format is designed to be:

• Human-readable
• Machine-sortable (lexicographic sort == chronological order)
• Filesystem-safe (no colons, valid on macOS, Linux, Windows)

Implementations

impl RunId

pub fn new() -> Self

Generate a new run ID based on current UTC timestamp.

Returns a RunId with format: YYYY-MM-DD_HH-mm-ss.SSSZ

pub fn for_test(id: &str) -> Self

Create a RunId from a string value (for testing).

This is a test-only constructor that allows creating a RunId with a fixed timestamp value for deterministic testing of collision handling.

Warning

This is intended for testing only. Using a fixed run_id in production could lead to directory collisions. Always use RunId::new or RunId::from_checkpoint in production code.

pub fn from_checkpoint(id: &str) -> Self

Create a RunId from an existing string (for resume).

This is used when loading a checkpoint to continue using the same run_id from the previous session.

pub fn as_str(&self) -> &str

Get the run ID as a string slice.

pub fn with_collision_counter(&self, counter: u32) -> Self

Generate a collision-safe variant with counter suffix.

Used when the base run directory already exists (rare case of multiple runs starting in the same millisecond).

Arguments

• counter - Collision counter (1-99)

Returns

A new RunId with format: YYYY-MM-DD_HH-mm-ss.SSSZ-NN

Trait Implementations

impl Clone for RunId

fn clone(&self) -> RunId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RunId

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

Formats the value using the given formatter.

impl Default for RunId

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for RunId

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for RunId

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

Formats the value using the given formatter.

impl PartialEq for RunId

fn eq(&self, other: &RunId) -> 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 Serialize for RunId

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for RunId

impl StructuralPartialEq for RunId