pub struct StashCollection<K, V> {
    pub id: i64,
    /* private fields */
}
Expand description

StashCollection is like a differential dataflow Collection, but the state of the collection is durable.

A StashCollection stores (key, value, timestamp, diff) entries. The key and value types are chosen by the caller; they must implement Ord and they must be serializable to and deserializable via serde. The timestamp and diff types are fixed to i64.

A StashCollection maintains a since frontier and an upper frontier, as described in the correctness vocabulary document.

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§id: i64

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impl<K, V> StashCollection<K, V>

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pub async fn is_initialized( &self, tx: &Transaction<'_> ) -> Result<bool, StashError>

Returns whether the collection is initialized, i.e. has been written to at least once. Collections that haven’t been written to at least once cannot be read.

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pub async fn make_batch_tx( &self, tx: &Transaction<'_> ) -> Result<AppendBatch, StashError>

Create a new AppendBatch for this collection from its current upper.

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impl<K, V> StashCollection<K, V>
where K: Data, V: Data,

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pub fn append_to_batch( &self, batch: &mut AppendBatch, key: &K, value: &V, diff: Diff )

Append key, value, diff to batch.

Trait Implementations§

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impl<K, V> Clone for StashCollection<K, V>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<K: Debug, V: Debug> Debug for StashCollection<K, V>

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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<K, V> From<i64> for StashCollection<K, V>

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fn from(id: i64) -> Self

Converts to this type from the input type.
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impl<K, V> Copy for StashCollection<K, V>

Auto Trait Implementations§

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impl<K, V> RefUnwindSafe for StashCollection<K, V>

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impl<K, V> Send for StashCollection<K, V>
where K: Send, V: Send,

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impl<K, V> Sync for StashCollection<K, V>
where K: Sync, V: Sync,

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impl<K, V> Unpin for StashCollection<K, V>
where K: Unpin, V: Unpin,

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impl<K, V> UnwindSafe for StashCollection<K, V>
where K: UnwindSafe, V: UnwindSafe,

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T, U> CastInto<U> for T
where U: CastFrom<T>,

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fn cast_into(self) -> U

Performs the cast.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
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impl<T> FutureExt for T

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

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ProgressEventTimestamp for T
where T: Data + Debug + Any,

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fn as_any(&self) -> &(dyn Any + 'static)

Upcasts this ProgressEventTimestamp to Any. Read more
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fn type_name(&self) -> &'static str

Returns the name of the concrete type of this object. Read more
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impl<P, R> ProtoType<R> for P
where R: RustType<P>,

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impl<T> PushInto<Vec<T>> for T

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fn push_into(self, target: &mut Vec<T>)

Push self into the target container.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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

Performs the conversion.
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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> Data for T
where T: Clone + 'static,