Struct WorkerRegistry 

pub struct WorkerRegistry<K, T> {
    workers: DashMap<K, Sender<T>>,
}

Registers worker senders by key, without owning workers or their execution.

Closed senders are replaced on lookup/creation. Cleanup checks channel identity under the same lock as replacement, so an old worker cannot remove a replacement registered under its key.

Fields

workers: DashMap<K, Sender<T>>

Implementations

impl<K: Eq + Hash, T> WorkerRegistry<K, T>

pub fn new() -> Self

pub async fn get(&self, key: &K) -> Option<Sender<T>>

Returns a live sender, if one is currently registered. The receiver can close after this method returns; callers must handle a failed send and retry worker lookup without discarding the unsent item.

pub async fn get_or_create( &self, key: K, capacity: usize, ) -> (Sender<T>, Option<Receiver<T>>)

Returns the registered sender and, only when created, its receiver.

Start the new worker before the next await so cancellation cannot leave a registered channel without a consumer. Existing channels retain their original capacity. New channel capacity must satisfy mpsc::channel.

pub async fn get_or_insert_with<F>(&self, key: K, create: F) -> Sender<T>

where F: FnOnce() -> Sender<T>,

Reuses a live sender or atomically creates its replacement.

create runs synchronously under the registry shard lock. It should only prepare the sender and capture any initialization state (such as the receiver) for the caller; start the worker after this method returns. Do not block or reenter the registry from create.

pub async fn remove_if_same(&self, key: &K, tx: &Sender<T>) -> bool

Removes the key only if it still points to this worker’s channel.

pub async fn len(&self) -> usize

Number of registered entries, including senders whose receivers closed.

pub async fn is_empty(&self) -> bool

Trait Implementations

impl<K: Eq + Hash, T> Default for WorkerRegistry<K, T>

fn default() -> Self

Returns the “default value” for a type.