Struct mz_persist_client::read::Subscribe

source ·
pub struct Subscribe<K: Codec, V: Codec, T, D> {
    snapshot: Option<Vec<LeasedBatchPart<T>>>,
    listen: Listen<K, V, T, D>,
}
Expand description

Capable of generating a snapshot of all data at as_of, followed by a listen of all updates.

For more details, see ReadHandle::snapshot and Listen.

Fields§

§snapshot: Option<Vec<LeasedBatchPart<T>>>§listen: Listen<K, V, T, D>

Implementations§

source§

impl<K, V, T, D> Subscribe<K, V, T, D>
where K: Debug + Codec, V: Debug + Codec, T: Timestamp + Lattice + Codec64, D: Semigroup + Codec64 + Send + Sync,

source

fn new( snapshot_parts: Vec<LeasedBatchPart<T>>, listen: Listen<K, V, T, D>, ) -> Self

source

pub async fn next( &mut self, listen_retry: Option<RetryParameters>, ) -> Vec<ListenEvent<T, LeasedBatchPart<T>>>

Returns a LeasedBatchPart enriched with the proper metadata.

First returns snapshot parts, until they’re exhausted, at which point begins returning listen parts.

The returned Antichain represents the subscription progress as it will be after the returned parts are fetched.

source§

impl<K, V, T, D> Subscribe<K, V, T, D>
where K: Debug + Codec, V: Debug + Codec, T: Timestamp + Lattice + Codec64, D: Semigroup + Codec64 + Send + Sync,

source

pub async fn fetch_next( &mut self, ) -> Vec<ListenEvent<T, ((Result<K, String>, Result<V, String>), T, D)>>

Equivalent to next, but rather than returning a LeasedBatchPart, fetches and returns the data from within it.

source

pub async fn fetch_batch_part( &mut self, part: LeasedBatchPart<T>, ) -> FetchedPart<K, V, T, D>

Fetches the contents of part and returns its lease.

source§

impl<K, V, T, D> Subscribe<K, V, T, D>
where K: Debug + Codec, V: Debug + Codec, T: Timestamp + Lattice + Codec64, D: Semigroup + Codec64 + Send + Sync,

source

pub async fn expire(self)

Politely expires this subscribe, releasing its lease.

There is a best-effort impl in Drop for ReadHandle to expire the ReadHandle held by the subscribe that wasn’t explicitly expired with this method. When possible, explicit expiry is still preferred because the Drop one is best effort and is dependant on a tokio Handle being available in the TLC at the time of drop (which is a bit subtle). Also, explicit expiry allows for control over when it happens.

Trait Implementations§

source§

impl<K: Debug + Codec, V: Debug + Codec, T: Debug, D: Debug> Debug for Subscribe<K, V, T, D>

source§

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<K, V, T, D> Freeze for Subscribe<K, V, T, D>
where T: Freeze,

§

impl<K, V, T, D> !RefUnwindSafe for Subscribe<K, V, T, D>

§

impl<K, V, T, D> Send for Subscribe<K, V, T, D>
where T: Send + Sync,

§

impl<K, V, T, D> Sync for Subscribe<K, V, T, D>
where T: Sync + Send,

§

impl<K, V, T, D> Unpin for Subscribe<K, V, T, D>
where T: Unpin,

§

impl<K, V, T, D> !UnwindSafe for Subscribe<K, V, T, D>

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T, U> CastInto<U> for T
where U: CastFrom<T>,

source§

fn cast_into(self) -> U

Performs the cast.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> FutureExt for T

source§

fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
source§

fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
source§

impl<T> Instrument for T

source§

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoRequest<T> for T

source§

fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
source§

impl<Unshared, Shared> IntoShared<Shared> for Unshared
where Shared: FromUnshared<Unshared>,

source§

fn into_shared(self) -> Shared

Creates a shared type from an unshared type.
source§

impl<T> Pointable for T

source§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
source§

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

Initializes a with the given initializer. Read more
source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<P, R> ProtoType<R> for P
where R: RustType<P>,

source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<'a, S, T> Semigroup<&'a S> for T
where T: Semigroup<S>,

source§

fn plus_equals(&mut self, rhs: &&'a S)

The method of std::ops::AddAssign, for types that do not implement AddAssign.
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<T> WithSubscriber for T

source§

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
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more