Struct JoinHandle

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pub struct JoinHandle<T>(JoinHandle<T>);
Available on crate feature async only.
Expand description

Wraps a tokio JoinHandle and provides 4 exclusive (i.e. they take self ownership) operations:

  • abort_on_drop: create an AbortOnDropHandle that will automatically abort the task when the handle is dropped.
  • JoinHandleExt::wait_and_assert_finished: wait for the task to finish and return its return value.
  • JoinHandleExt::abort_and_wait: abort the task and wait for it to be finished.
  • into_tokio_handle: turn it into an ordinary tokio JoinHandle.

Tuple Fields§

§0: JoinHandle<T>

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impl<T> JoinHandle<T>

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pub fn abort_on_drop(self) -> AbortOnDropHandle<T>

Create an AbortOnDropHandle from this JoinHandle.

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pub fn is_finished(&self) -> bool

Checks if the task associated with this JoinHandle has finished.a

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pub fn into_tokio_handle(self) -> TokioJoinHandle<T>

Checks if the task associated with this JoinHandle has finished.a

Trait Implementations§

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impl<T: Debug> Debug for JoinHandle<T>

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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<T> Future for JoinHandle<T>

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type Output = Result<T, JoinError>

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: Send> JoinHandleExt<T> for JoinHandle<T>

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fn wait_and_assert_finished<'async_trait>( self, ) -> Pin<Box<dyn Future<Output = T> + Send + 'async_trait>>
where Self: 'async_trait,

Waits for the task to finish, resuming the unwind if the task panicked. Read more
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fn abort_and_wait<'async_trait>( self, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait,

Aborts the task, then waits for it to complete.

Auto Trait Implementations§

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impl<T> Freeze for JoinHandle<T>

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impl<T> RefUnwindSafe for JoinHandle<T>

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impl<T> Send for JoinHandle<T>
where T: Send,

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impl<T> Sync for JoinHandle<T>
where T: Send,

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impl<T> Unpin for JoinHandle<T>

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impl<T> UnwindSafe for JoinHandle<T>

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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where T: ?Sized,

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Mutably borrows from an owned value. Read more
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fn copy_as(self) -> T

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where T: Future + ?Sized,

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where F: FnOnce(Self::Output) -> U, Self: Sized,

Map this future’s output to a different type, returning a new future of the resulting type. Read more
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Map this future’s output to a different type, returning a new future of the resulting type. Read more
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fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F>
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Chain on a computation for when a future finished, passing the result of the future to the provided closure f. Read more
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fn left_future<B>(self) -> Either<Self, B>
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Wrap this future in an Either future, making it the left-hand variant of that Either. Read more
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Wrap this future in an Either future, making it the right-hand variant of that Either. Read more
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where Self: Sized,

Convert this future into a single element stream. Read more
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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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where Self::Output: Stream, Self: Sized,

Flatten the execution of this future when the successful result of this future is a stream. Read more
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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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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,

Catches unwinding panics while polling the future. Read more
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where Self: Sized, Self::Output: Clone,

Create a cloneable handle to this future where all handles will resolve to the same result. Read more
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where Self: Sized,

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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where Self: Unpin,

A convenience for calling Future::poll on Unpin future types.
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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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fn err_into<E>(self) -> ErrInto<Self, E>
where Self: Sized, Self::Error: Into<E>,

Maps this future’s Error to a new error type using the Into trait. Read more
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fn ok_into<U>(self) -> OkInto<Self, U>
where Self: Sized, Self::Ok: Into<U>,

Maps this future’s Ok to a new type using the Into trait.
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fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F>
where F: FnOnce(Self::Ok) -> Fut, Fut: TryFuture<Error = Self::Error>, Self: Sized,

Executes another future after this one resolves successfully. The success value is passed to a closure to create this subsequent future. Read more
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fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F>
where F: FnOnce(Self::Error) -> Fut, Fut: TryFuture<Ok = Self::Ok>, Self: Sized,

Executes another future if this one resolves to an error. The error value is passed to a closure to create this subsequent future. Read more
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fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F>
where F: FnOnce(&Self::Ok), Self: Sized,

Do something with the success value of a future before passing it on. Read more
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fn inspect_err<F>(self, f: F) -> InspectErr<Self, F>
where F: FnOnce(&Self::Error), Self: Sized,

Do something with the error value of a future before passing it on. Read more
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fn try_flatten(self) -> TryFlatten<Self, Self::Ok>
where Self::Ok: TryFuture<Error = Self::Error>, Self: Sized,

Flatten the execution of this future when the successful result of this future is another future. Read more
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fn try_flatten_stream(self) -> TryFlattenStream<Self>
where Self::Ok: TryStream<Error = Self::Error>, Self: Sized,

Flatten the execution of this future when the successful result of this future is a stream. Read more
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fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F>
where Self: Sized, F: FnOnce(Self::Error) -> Self::Ok,

Unwraps this future’s output, producing a future with this future’s Ok type as its Output type. Read more
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fn into_future(self) -> IntoFuture<Self>
where Self: Sized,

Wraps a TryFuture into a type that implements Future. Read more
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fn try_poll_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<Self::Ok, Self::Error>>
where Self: Unpin,

A convenience method for calling TryFuture::try_poll on Unpin future types.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,