Struct VecDequeBackend 

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

A simple in-memory backend that uses a VecDeque to store tasks.

This backend is primarily intended for testing and demonstration purposes. It does not persist tasks and is not suitable for production use.

Implementations

impl<T> VecDequeBackend<T>

pub fn new() -> Self

Create a new VecDequeBackend with default capacity.

pub fn with_capacity(capacity: usize) -> Self

Create a new VecDequeBackend with a specified capacity for the internal queue.

Trait Implementations

impl<T> Backend for VecDequeBackend<T>

type Task = Task<T>

The type of task the backend emits.

type Error = VecDequeError

The error type returned by backend operations

fn poll_ready( &mut self, cx: &mut Context<'_>, _worker: &WorkerContext, ) -> Poll<Result<(), Self::Error>>

Polls whether the backend is ready for the worker to request more work.

fn poll_next( &mut self, _cx: &mut Context<'_>, _worker: &WorkerContext, ) -> Poll<Option<Result<Self::Task, Self::Error>>>

Polls the backend for the next available task for this worker.

fn poll_close( &mut self, _: &mut Context<'_>, _: &WorkerContext, ) -> Poll<Result<(), Self::Error>>

Flushes/releases any resources the backend holds (pending acks, open subscriptions, connections) before the worker fully shuts down.

impl<Args> BackendConfig for VecDequeBackend<Args>

type Args = Args

The type of argument this backend emits

type Id = RandomId

The internal type of this Backend’s TaskId

type Kind = Ephemeral

This defines the kind of Backend

type Config = ()

The config for the backend

type Layer = Identity

The type representing backend middleware layer.

fn config(&self) -> &Self::Config

Returns the config associated with the backend.

fn middleware(&mut self, _worker: &mut WorkerContext) -> Self::Layer

Returns the backend’s middleware layer.

impl<T: Clone> Clone for VecDequeBackend<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for VecDequeBackend<T>

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

Formats the value using the given formatter.

impl<T> Default for VecDequeBackend<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T> Sink<Task<T>> for VecDequeBackend<T>

where T: Send + Unpin + 'static,

type Error = VecDequeError

The type of value produced by the sink when an error occurs.

fn poll_ready( self: Pin<&mut Self>, _cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>

Attempts to prepare the Sink to receive a value.

fn start_send(self: Pin<&mut Self>, item: Task<T>) -> Result<(), Self::Error>

Begin the process of sending a value to the sink. Each call to this function must be preceded by a successful call to poll_ready which returned Poll::Ready(Ok(())).

fn poll_flush( self: Pin<&mut Self>, _cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>

Flush any remaining output from this sink.

fn poll_close( self: Pin<&mut Self>, _cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>

Flush any remaining output and close this sink, if necessary.