reth_tasks

Struct TaskManager

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pub struct TaskManager { /* private fields */ }
Expand description

Many reth components require to spawn tasks for long-running jobs. For example discovery spawns tasks to handle egress and ingress of udp traffic or network that spawns session tasks that handle the traffic to and from a peer.

To unify how tasks are created, the TaskManager provides access to the configured Tokio runtime. A TaskManager stores the [tokio::runtime::Handle] it is associated with. In this way it is possible to configure on which runtime a task is executed.

The main purpose of this type is to be able to monitor if a critical task panicked, for diagnostic purposes, since tokio task essentially fail silently. Therefore, this type is a Stream that yields the name of panicked task, See TaskExecutor::spawn_critical. In order to execute Tasks use the TaskExecutor type TaskManager::executor.

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impl TaskManager

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pub fn current() -> Self

Returns a a TaskManager over the currently running Runtime.

§Panics

This will panic if called outside the context of a Tokio runtime.

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pub fn new(handle: Handle) -> Self

Create a new instance connected to the given handle’s tokio runtime.

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pub fn executor(&self) -> TaskExecutor

Returns a new TaskExecutor that can spawn new tasks onto the tokio runtime this type is connected to.

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pub fn graceful_shutdown(self)

Fires the shutdown signal and awaits until all tasks are shutdown.

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pub fn graceful_shutdown_with_timeout(self, timeout: Duration) -> bool

Fires the shutdown signal and awaits until all tasks are shutdown.

Returns true if all tasks were shutdown before the timeout elapsed.

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impl Debug for TaskManager

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

Formats the value using the given formatter. Read more
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impl Future for TaskManager

An endless future that resolves if a critical task panicked.

See TaskExecutor::spawn_critical

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type Output = PanickedTaskError

The type of value produced on completion.
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fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

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where T: ?Sized,

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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

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impl<T> FutureExt for T
where T: Future + ?Sized,

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fn map<U, F>(self, f: F) -> Map<Self, F>
where F: FnOnce(Self::Output) -> U, Self: Sized,

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fn map_into<U>(self) -> MapInto<Self, U>
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fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F>
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fn left_future<B>(self) -> Either<Self, B>
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where A: Future<Output = Self::Output>, Self: Sized,

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fn into_stream(self) -> IntoStream<Self>
where Self: Sized,

Convert this future into a single element stream. Read more
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fn flatten(self) -> Flatten<Self>
where Self::Output: Future, Self: Sized,

Flatten the execution of this future when the output of this future is itself another future. Read more
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fn flatten_stream(self) -> FlattenStream<Self>
where Self::Output: Stream, Self: Sized,

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fn fuse(self) -> Fuse<Self>
where Self: Sized,

Fuse a future such that poll will never again be called once it has completed. This method can be used to turn any Future into a FusedFuture. Read more
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fn inspect<F>(self, f: F) -> Inspect<Self, F>
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Do something with the output of a future before passing it on. Read more
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fn catch_unwind(self) -> CatchUnwind<Self>
where Self: Sized + UnwindSafe,

Available on crate feature std only.
Catches unwinding panics while polling the future. Read more
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fn shared(self) -> Shared<Self>
where Self: Sized, Self::Output: Clone,

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fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)
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Available on crate features channel and std only.
Turn this future into a future that yields () on completion and sends its output to another future on a separate task. Read more
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fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + Send + 'a>>
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fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>>
where Self: Sized + 'a,

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fn unit_error(self) -> UnitError<Self>
where Self: Sized,

Turns a Future<Output = T> into a TryFuture<Ok = T, Error = ()>.
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fn never_error(self) -> NeverError<Self>
where Self: Sized,

Turns a Future<Output = T> into a TryFuture<Ok = T, Error = Never>.
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fn poll_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Self::Output>
where Self: Unpin,

A convenience for calling Future::poll on Unpin future types.
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fn now_or_never(self) -> Option<Self::Output>
where Self: Sized,

Evaluates and consumes the future, returning the resulting output if the future is ready after the first call to Future::poll. Read more
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impl<T> FutureExt for T
where T: Future + ?Sized,

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fn timeout(self, timeout: Duration) -> Timeout<Self>
where Self: Sized,

A wrapper around [tokio::time::timeout], with the advantage that it is easier to write fluent call chains. Read more
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

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fn instrument(self, span: Span) -> Instrumented<Self>

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fn into(self) -> U

Calls U::from(self).

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fn into_either(self, into_left: bool) -> Either<Self, Self>

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type Output = <F as Future>::Output

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type IntoFuture = F

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const ALIGN: usize = _

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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type Error = Infallible

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Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 72 bytes