Struct DataLoader

pub struct DataLoader<E>
where
    E: DataLoaderFetcher + Send + Sync + 'static,
{ /* private fields */ }

A dataloader used to batch requests to a DataLoaderFetcher

Implementations

impl<E> DataLoader<E>

where E: DataLoaderFetcher + Send + Sync + 'static,

pub fn new( executor: E, batch_size: usize, concurrency: usize, delay: Duration, ) -> Self

Create a new dataloader

pub const fn builder() -> DataLoaderBuilder<E>

Create a builder for a DataLoader

pub async fn load(&self, items: E::Key) -> Result<Option<E::Value>, ()>

Load a single key Can return an error if the underlying DataLoaderFetcher returns an error

Returns None if the key is not found

pub async fn load_many<I>( &self, items: I, ) -> Result<HashMap<E::Key, E::Value>, ()>

where I: IntoIterator<Item = E::Key> + Send,

Load many keys Can return an error if the underlying DataLoaderFetcher returns an error

Returns a map of keys to values which may be incomplete if any of the keys were not found