Struct polymesh_api_client::client::Subscription
[−]pub struct Subscription<Notif> { /* private fields */ }Expand description
Active subscription on the client.
It will automatically unsubscribe in the Subscription::drop so no need to explicitly call
the unsubscribe method if it is an an subscription based on [SubscriptionId].
Implementations
impl<Notif> Subscription<Notif>
impl<Notif> Subscription<Notif>
pub fn new(
to_back: Sender<FrontToBack>,
notifs_rx: Receiver<Value>,
kind: SubscriptionKind
) -> Subscription<Notif>
pub fn new(
to_back: Sender<FrontToBack>,
notifs_rx: Receiver<Value>,
kind: SubscriptionKind
) -> Subscription<Notif>
Create a new subscription.
pub fn kind(&self) -> &SubscriptionKind
pub fn kind(&self) -> &SubscriptionKind
Return the subscription type and, if applicable, ID.
impl<Notif> Subscription<Notif>where
Notif: DeserializeOwned,
impl<Notif> Subscription<Notif>where
Notif: DeserializeOwned,
pub async fn next(
&mut self
) -> impl Future<Output = Option<Result<Notif, Error>>>
pub async fn next(
&mut self
) -> impl Future<Output = Option<Result<Notif, Error>>>
Returns the next notification from the stream.
This may return None if the subscription has been terminated,
which may happen if the channel becomes full or is dropped.
Note: This has an identical signature to the [StreamExt::next]
method (and delegates to that). Import [StreamExt] if you’d like
access to other stream combinator methods.
Trait Implementations
impl<Notif> Debug for Subscription<Notif>where
Notif: Debug,
impl<Notif> Debug for Subscription<Notif>where
Notif: Debug,
impl<Notif> Drop for Subscription<Notif>
impl<Notif> Drop for Subscription<Notif>
impl<Notif> Stream for Subscription<Notif>where
Notif: DeserializeOwned,
impl<Notif> Stream for Subscription<Notif>where
Notif: DeserializeOwned,
fn poll_next(
self: Pin<&mut Subscription<Notif>>,
cx: &mut Context<'_>
) -> Poll<Option<<Subscription<Notif> as Stream>::Item>>
fn poll_next(
self: Pin<&mut Subscription<Notif>>,
cx: &mut Context<'_>
) -> Poll<Option<<Subscription<Notif> as Stream>::Item>>
Attempt to pull out the next value of this stream, registering the
current task for wakeup if the value is not yet available, and returning
None if the stream is exhausted. Read moreimpl<Notif> Unpin for Subscription<Notif>
Auto Trait Implementations
impl<Notif> !RefUnwindSafe for Subscription<Notif>
impl<Notif> Send for Subscription<Notif>where
Notif: Send,
impl<Notif> Sync for Subscription<Notif>where
Notif: Sync,
impl<Notif> !UnwindSafe for Subscription<Notif>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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Mutably borrows from an owned value. Read more
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fn checked_from<T>(t: T) -> Option<Self>where
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Self: TryInto<T>,
fn checked_into<T>(self) -> Option<T>where
Self: TryInto<T>,
impl<T> Downcast for Twhere
T: Any,
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Execute predicate over asynchronous stream, and return
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self,
limit: impl Into<Option<usize>>
) -> FlattenUnordered<Self>where
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self,
limit: impl Into<Option<usize>>
) -> FlattenUnordered<Self>where
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self,
limit: impl Into<Option<usize>>,
f: F
) -> FlatMapUnordered<Self, U, F>where
U: Stream + Unpin,
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self,
limit: impl Into<Option<usize>>,
f: F
) -> FlatMapUnordered<Self, U, F>where
U: Stream + Unpin,
F: FnMut(Self::Item) -> U,
Maps a stream like [
StreamExt::map] but flattens nested Streams
and polls them concurrently, yielding items in any order, as they made
available. Read morefn scan<S, B, Fut, F>(self, initial_state: S, f: F) -> Scan<Self, S, Fut, F>where
F: FnMut(&mut S, Self::Item) -> Fut,
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F: FnMut(&mut S, Self::Item) -> Fut,
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Combinator similar to [
StreamExt::fold] that holds internal state
and produces a new stream. Read morefn skip_while<Fut, F>(self, f: F) -> SkipWhile<Self, Fut, F>where
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Fut: Future<Output = bool>,
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Skip elements on this stream while the provided asynchronous predicate
resolves to
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F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
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Fut: Future<Output = bool>,
Take elements from this stream while the provided asynchronous predicate
resolves to
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Take elements from this stream until the provided future resolves. Read more
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fn for_each_concurrent<Fut, F>(
self,
limit: impl Into<Option<usize>>,
f: F
) -> ForEachConcurrent<Self, Fut, F>where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = ()>,
fn for_each_concurrent<Fut, F>(
self,
limit: impl Into<Option<usize>>,
f: F
) -> ForEachConcurrent<Self, Fut, F>where
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Runs this stream to completion, executing the provided asynchronous
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fn take(self, n: usize) -> Take<Self>
Creates a new stream of at most
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fn catch_unwind(self) -> CatchUnwind<Self>where
Self: UnwindSafe,
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Catches unwinding panics while polling the stream. Read more
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self
) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>where
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fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F>where
F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F>where
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Fut: TryFuture<Error = Self::Error>,
Chain on a computation for when a value is ready, passing the successful
results to the provided closure
f. Read morefn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F>where
F: FnMut(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F>where
F: FnMut(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
Chain on a computation for when an error happens, passing the
erroneous result to the provided closure
f. Read morefn inspect_ok<F>(self, f: F) -> InspectOk<Self, F>where
F: FnMut(&Self::Ok),
fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F>where
F: FnMut(&Self::Ok),
Do something with the success value of this stream, afterwards passing
it on. Read more
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F: FnMut(&Self::Error),
fn inspect_err<F>(self, f: F) -> InspectErr<Self, F>where
F: FnMut(&Self::Error),
Do something with the error value of this stream, afterwards passing it on. Read more
fn into_stream(self) -> IntoStream<Self>
fn into_stream(self) -> IntoStream<Self>
fn try_next(&mut self) -> TryNext<'_, Self>where
Self: Unpin,
fn try_next(&mut self) -> TryNext<'_, Self>where
Self: Unpin,
Creates a future that attempts to resolve the next item in the stream.
If an error is encountered before the next item, the error is returned
instead. Read more
fn try_for_each<Fut, F>(self, f: F) -> TryForEach<Self, Fut, F>where
F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = Self::Error>,
fn try_for_each<Fut, F>(self, f: F) -> TryForEach<Self, Fut, F>where
F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = Self::Error>,
Attempts to run this stream to completion, executing the provided
asynchronous closure for each element on the stream. Read more
fn try_skip_while<Fut, F>(self, f: F) -> TrySkipWhile<Self, Fut, F>where
F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
fn try_skip_while<Fut, F>(self, f: F) -> TrySkipWhile<Self, Fut, F>where
F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
Skip elements on this stream while the provided asynchronous predicate
resolves to
true. Read morefn try_take_while<Fut, F>(self, f: F) -> TryTakeWhile<Self, Fut, F>where
F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
fn try_take_while<Fut, F>(self, f: F) -> TryTakeWhile<Self, Fut, F>where
F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
Take elements on this stream while the provided asynchronous predicate
resolves to
true. Read morefn try_for_each_concurrent<Fut, F>(
self,
limit: impl Into<Option<usize>>,
f: F
) -> TryForEachConcurrent<Self, Fut, F>where
F: FnMut(Self::Ok) -> Fut,
Fut: Future<Output = Result<(), Self::Error>>,
fn try_for_each_concurrent<Fut, F>(
self,
limit: impl Into<Option<usize>>,
f: F
) -> TryForEachConcurrent<Self, Fut, F>where
F: FnMut(Self::Ok) -> Fut,
Fut: Future<Output = Result<(), Self::Error>>,
Attempts to run this stream to completion, executing the provided asynchronous
closure for each element on the stream concurrently as elements become
available, exiting as soon as an error occurs. Read more
fn try_collect<C>(self) -> TryCollect<Self, C>where
C: Default + Extend<Self::Ok>,
fn try_collect<C>(self) -> TryCollect<Self, C>where
C: Default + Extend<Self::Ok>,
Attempt to transform a stream into a collection,
returning a future representing the result of that computation. Read more
fn try_chunks(self, capacity: usize) -> TryChunks<Self>
fn try_chunks(self, capacity: usize) -> TryChunks<Self>
An adaptor for chunking up successful items of the stream inside a vector. Read more
fn try_filter<Fut, F>(self, f: F) -> TryFilter<Self, Fut, F>where
Fut: Future<Output = bool>,
F: FnMut(&Self::Ok) -> Fut,
fn try_filter<Fut, F>(self, f: F) -> TryFilter<Self, Fut, F>where
Fut: Future<Output = bool>,
F: FnMut(&Self::Ok) -> Fut,
Attempt to filter the values produced by this stream according to the
provided asynchronous closure. Read more
fn try_filter_map<Fut, F, T>(self, f: F) -> TryFilterMap<Self, Fut, F>where
Fut: TryFuture<Ok = Option<T>, Error = Self::Error>,
F: FnMut(Self::Ok) -> Fut,
fn try_filter_map<Fut, F, T>(self, f: F) -> TryFilterMap<Self, Fut, F>where
Fut: TryFuture<Ok = Option<T>, Error = Self::Error>,
F: FnMut(Self::Ok) -> Fut,
Attempt to filter the values produced by this stream while
simultaneously mapping them to a different type according to the
provided asynchronous closure. Read more
fn try_flatten(self) -> TryFlatten<Self>where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error: From<Self::Error>,
fn try_flatten(self) -> TryFlatten<Self>where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error: From<Self::Error>,
Flattens a stream of streams into just one continuous stream. Read more
fn try_fold<T, Fut, F>(self, init: T, f: F) -> TryFold<Self, Fut, T, F>where
F: FnMut(T, Self::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = Self::Error>,
fn try_fold<T, Fut, F>(self, init: T, f: F) -> TryFold<Self, Fut, T, F>where
F: FnMut(T, Self::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = Self::Error>,
Attempt to execute an accumulating asynchronous computation over a
stream, collecting all the values into one final result. Read more
fn try_concat(self) -> TryConcat<Self>where
Self::Ok: Extend<<Self::Ok as IntoIterator>::Item> + IntoIterator + Default,
fn try_concat(self) -> TryConcat<Self>where
Self::Ok: Extend<<Self::Ok as IntoIterator>::Item> + IntoIterator + Default,
Attempt to concatenate all items of a stream into a single
extendable destination, returning a future representing the end result. Read more
fn try_buffer_unordered(self, n: usize) -> TryBufferUnordered<Self>where
Self::Ok: TryFuture<Error = Self::Error>,
fn try_buffer_unordered(self, n: usize) -> TryBufferUnordered<Self>where
Self::Ok: TryFuture<Error = Self::Error>,
Attempt to execute several futures from a stream concurrently (unordered). Read more
fn try_buffered(self, n: usize) -> TryBuffered<Self>where
Self::Ok: TryFuture<Error = Self::Error>,
fn try_buffered(self, n: usize) -> TryBuffered<Self>where
Self::Ok: TryFuture<Error = Self::Error>,
Attempt to execute several futures from a stream concurrently. Read more
fn try_poll_next_unpin(
&mut self,
cx: &mut Context<'_>
) -> Poll<Option<Result<Self::Ok, Self::Error>>>where
Self: Unpin,
fn try_poll_next_unpin(
&mut self,
cx: &mut Context<'_>
) -> Poll<Option<Result<Self::Ok, Self::Error>>>where
Self: Unpin,
fn into_async_read(self) -> IntoAsyncRead<Self>where
Self: TryStreamExt<Error = Error>,
Self::Ok: AsRef<[u8]>,
fn into_async_read(self) -> IntoAsyncRead<Self>where
Self: TryStreamExt<Error = Error>,
Self::Ok: AsRef<[u8]>,
Adapter that converts this stream into an
AsyncBufRead. Read moresourceimpl<S, T> UncheckedInto<T> for Swhere
T: UncheckedFrom<S>,
impl<S, T> UncheckedInto<T> for Swhere
T: UncheckedFrom<S>,
sourcefn unchecked_into(self) -> T
fn unchecked_into(self) -> T
The counterpart to
unchecked_from.sourceimpl<T, S> UniqueSaturatedInto<T> for Swhere
T: Bounded,
S: TryInto<T>,
impl<T, S> UniqueSaturatedInto<T> for Swhere
T: Bounded,
S: TryInto<T>,
sourcefn unique_saturated_into(self) -> T
fn unique_saturated_into(self) -> T
Consume self to return an equivalent value of
T.