Struct DataLoader 

pub struct DataLoader<K, V>
where
    K: Eq + Hash + Clone,
    V: Clone,
{ /* private fields */ }

DataLoader for batching and caching

Prevents N+1 queries by batching multiple individual loads into a single batch load.

Implementations

impl<K, V> DataLoader<K, V>

where K: Eq + Hash + Clone + Send + Sync, V: Clone + Send + Sync,

pub fn new(config: DataLoaderConfig) -> Self

Create a new DataLoader

pub fn load(&self, key: K) -> Option<V>

Load a single value

pub fn load_many(&self, keys: Vec<K>) -> HashMap<K, Option<V>>

Load multiple values

pub fn prime(&self, key: K, value: V)

Prime the cache with a value

pub fn clear(&self)

Clear the cache

pub fn clear_key(&self, key: &K)

Clear a single key from the cache

pub fn execute_batch<F>(&self, loader: F) -> BatchResult<K, V>

where F: FnMut(Vec<K>) -> HashMap<K, V>,

Execute pending batch

pub fn stats(&self) -> DataLoaderStats

Get statistics

pub fn config(&self) -> &DataLoaderConfig

Get configuration

pub fn clean_expired(&self)

Clean expired cache entries

Trait Implementations

impl<K, V> Clone for DataLoader<K, V>

where K: Eq + Hash + Clone, V: Clone,

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K, V> Debug for DataLoader<K, V>

where K: Eq + Hash + Clone + Debug, V: Clone + Debug,

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

Formats the value using the given formatter.