Struct HookContext 

pub struct HookContext {
    pub stage: String,
    pub transform_index: usize,
    pub transform_name: String,
    pub elapsed_ms: f64,
    pub metadata: HashMap<String, String>,
}

Context passed to hooks containing metadata

Fields

stage: String

Stage name (e.g., “fit”, “transform”)

transform_index: usize

Transform index in pipeline

transform_name: String

Transform name

elapsed_ms: f64

Elapsed time in milliseconds

metadata: HashMap<String, String>

Additional metadata

Implementations

impl HookContext

pub fn new(stage: &str, transform_index: usize, transform_name: &str) -> Self

Create a new hook context

pub fn add_metadata(&mut self, key: String, value: String)

Add metadata entry

Trait Implementations

impl Clone for HookContext

fn clone(&self) -> HookContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HookContext

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

Formats the value using the given formatter.

impl Default for HookContext

fn default() -> HookContext

Returns the “default value” for a type.