Struct CollectionManager

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pub struct CollectionManager<T>{
    read_only: bool,
    differential_collections: Arc<Mutex<BTreeMap<GlobalId, (UnboundedSender<(StorageWriteOp, Sender<Result<(), StorageError<T>>>)>, AbortOnDropHandle<()>, Sender<()>)>>>,
    append_only_collections: Arc<Mutex<BTreeMap<GlobalId, (UnboundedSender<(Vec<AppendOnlyUpdate>, Sender<Result<(), StorageError<T>>>)>, AbortOnDropHandle<()>, Sender<()>)>>>,
    user_batch_duration_ms: Arc<AtomicU64>,
    now: NowFn,
}

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§read_only: bool

When a CollectionManager is in read-only mode it must not affect any changes to external state.

§differential_collections: Arc<Mutex<BTreeMap<GlobalId, (UnboundedSender<(StorageWriteOp, Sender<Result<(), StorageError<T>>>)>, AbortOnDropHandle<()>, Sender<()>)>>>

These are collections that we write to by adding/removing updates to an internal desired collection. The CollectionManager continually makes sure that collection contents (in persist) match the desired state.

§append_only_collections: Arc<Mutex<BTreeMap<GlobalId, (UnboundedSender<(Vec<AppendOnlyUpdate>, Sender<Result<(), StorageError<T>>>)>, AbortOnDropHandle<()>, Sender<()>)>>>

Collections that we only append to using blind-writes.

Every write succeeds at some timestamp, and we never check what the actual contents of the collection (in persist) are.

§user_batch_duration_ms: Arc<AtomicU64>

Amount of time we’ll wait before sending a batch of inserts to Persist, for user collections.

§now: NowFn

Implementations§

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impl<T> CollectionManager<T>

The CollectionManager provides two complementary functions:

  • Providing an API to append values to a registered set of collections. For this usecase:
    • The CollectionManager expects to be the only writer.
    • Appending to a closed collection panics
  • Automatically advancing the timestamp of managed collections every second. For this usecase:
    • The CollectionManager handles contention by permitting and ignoring errors.
    • Closed collections will not panic if they continue receiving these requests.
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pub(crate) fn new(read_only: bool, now: NowFn) -> CollectionManager<T>

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pub fn update_user_batch_duration(&self, duration: Duration)

Updates the duration we’ll wait to batch events for user owned collections.

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pub(crate) fn register_differential_collection<R>( &self, id: GlobalId, write_handle: WriteHandle<SourceData, (), T, StorageDiff>, read_handle_fn: R, force_writable: bool, introspection_config: DifferentialIntrospectionConfig<T>, )
where R: FnMut() -> Pin<Box<dyn Future<Output = ReadHandle<SourceData, (), T, StorageDiff>> + Send>> + Send + Sync + 'static,

Registers a new differential collection.

The CollectionManager will automatically advance the upper of every registered collection every second.

Update the desired state of a differential collection using Self::differential_write.

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pub(crate) fn register_append_only_collection( &self, id: GlobalId, write_handle: WriteHandle<SourceData, (), T, StorageDiff>, force_writable: bool, introspection_config: Option<AppendOnlyIntrospectionConfig<T>>, )

Registers a new append-only collection.

The CollectionManager will automatically advance the upper of every registered collection every second.

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pub(crate) fn unregister_collection( &self, id: GlobalId, ) -> BoxFuture<'static, ()>

Unregisters the given collection.

Also waits until the CollectionManager has completed all outstanding work to ensure that it has stopped referencing the provided id.

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pub(crate) fn append_only_write_sender( &self, id: GlobalId, ) -> UnboundedSender<(Vec<AppendOnlyUpdate>, Sender<Result<(), StorageError<T>>>)>

Returns a sender for writes to the given append-only collection.

§Panics
  • If id does not belong to an append-only collections.
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pub(crate) fn differential_write_sender( &self, id: GlobalId, ) -> UnboundedSender<(StorageWriteOp, Sender<Result<(), StorageError<T>>>)>

Returns a sender for writes to the given differential collection.

§Panics
  • If id does not belong to a differential collections.
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pub(crate) fn blind_write(&self, id: GlobalId, updates: Vec<AppendOnlyUpdate>)

Appends updates to the append-only collection identified by id, at some timestamp. Does not wait for the append to complete.

§Panics
  • If id does not belong to an append-only collections.
  • If this CollectionManager is in read-only mode.
  • If the collection closed.
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pub(crate) fn differential_write(&self, id: GlobalId, op: StorageWriteOp)

Updates the desired collection state of the differential collection identified by id. The underlying persist shard will reflect this change at _some_point. Does not wait for the change to complete.

§Panics
  • If id does not belong to a differential collection.
  • If the collection closed.
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pub(crate) fn differential_append( &self, id: GlobalId, updates: Vec<(Row, Diff)>, )

Appends the given updates to the differential collection identified by id.

§Panics
  • If id does not belong to a differential collection.
  • If the collection closed.
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pub(crate) fn monotonic_appender( &self, id: GlobalId, ) -> Result<MonotonicAppender<T>, StorageError<T>>

Returns a MonotonicAppender that can be used to monotonically append updates to the collection correlated with id.

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fn get_read_only(&self, id: GlobalId, force_writable: bool) -> bool

Trait Implementations§

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impl<T> Clone for CollectionManager<T>

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fn clone(&self) -> CollectionManager<T>

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for CollectionManager<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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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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impl<P, R> ProtoType<R> for P
where R: RustType<P>,

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

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

The method of std::ops::AddAssign, for types that do not implement AddAssign.
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impl<T> ServiceExt for T

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fn map_response_body<F>(self, f: F) -> MapResponseBody<Self, F>
where Self: Sized,

Apply a transformation to the response body. Read more
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fn decompression(self) -> Decompression<Self>
where Self: Sized,

Decompress response bodies. Read more
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fn trace_for_http(self) -> Trace<Self, SharedClassifier<ServerErrorsAsFailures>>
where Self: Sized,

High level tracing that classifies responses using HTTP status codes. Read more
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fn trace_for_grpc(self) -> Trace<Self, SharedClassifier<GrpcErrorsAsFailures>>
where Self: Sized,

High level tracing that classifies responses using gRPC headers. Read more
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fn follow_redirects(self) -> FollowRedirect<Self>
where Self: Sized,

Follow redirect resposes using the Standard policy. Read more
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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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> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. 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,

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