Struct FnExtractor 

pub struct FnExtractor<T> { /* private fields */ }

Generic extractor that uses KeyExtract trait to generate cache keys.

This extractor bridges the simple KeyExtract trait to hitbox’s Extractor trait, adding the function path as a prefix to ensure different functions have different cache keys.

Example

use hitbox_fn::{Args, FnExtractor};

let extractor = FnExtractor::<Args<(UserId, TenantId)>>::new("my_module::fetch_user");

Implementations

impl<T> FnExtractor<T>

pub fn new(fn_path: &'static str) -> Self

Create a new function extractor with the given fully qualified function path.

The function path is used as a prefix in the cache key to ensure different functions produce different keys even with the same arguments.

Trait Implementations

impl<T> Extractor for FnExtractor<T>

where T: KeyExtract + Send + Sync,

type Subject = T

The type from which cache key components are extracted.

fn get<'life0, 'async_trait>( &'life0 self, subject: Self::Subject, ) -> Pin<Box<dyn Future<Output = KeyParts<Self::Subject>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Extract cache key components from the subject.