Enum mz_persist::indexed::CmdRead

source · [−]

pub enum CmdRead {
    Load(String, (String, String), PFutureHandle<Option<Id>>),
    GetDescriptions(PFutureHandle<HashMap<Id, StreamDesc>>),
    Snapshot(Id, PFutureHandle<ArrangementSnapshot>),
    Listen(Id, Sender<ListenEvent>, PFutureHandle<ArrangementSnapshot>),
    Stop(PFutureHandle<()>),
}

Expand description

A read-only input to the persist state machine.

Variants

`Load(String, (String, String), PFutureHandle<Option<Id>>)`

Loads the arrangement with the given external stream name, returning the corresponding internal stream id.

`GetDescriptions(PFutureHandle<HashMap<Id, StreamDesc>>)`

Returns the StreamDesc of every active (non-deleted) stream.

`Snapshot(Id, PFutureHandle<ArrangementSnapshot>)`

Returns a crate::indexed::snapshot::Snapshot for the given id.

`Listen(Id, Sender<ListenEvent>, PFutureHandle<ArrangementSnapshot>)`

Registers a callback to be invoked on successful writes and seals.

Also returns a copy of the snapshot so that users can, if they want, apply their logic to a consistent read of the entire stream.

`Stop(PFutureHandle<()>)`

Flush out any pending work and close the underlying storage, causing all future commands to error.

If applicable, releases exclusive-writer locks.

Implementations

impl CmdRead

pub fn fill_err_runtime_shutdown(self)

Fills self’s response, if applicable, with Error::RuntimeShutdown.

Trait Implementations

impl Debug for CmdRead

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl !RefUnwindSafe for CmdRead

impl Send for CmdRead

impl Sync for CmdRead

impl Unpin for CmdRead

impl !UnwindSafe for CmdRead

Blanket Implementations

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> FutureExt for T

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

impl<T> Instrument for T

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

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

fn in_current_span(self) -> Instrumented<Self>

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

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

const: unstable · source

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

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impl<T> Same<T> for T

type Output = T

Should always be Self

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

type Error = Infallible

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const: unstable · source

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

Performs the conversion.

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.

const: unstable · source

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

Performs the conversion.

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

fn vzip(self) -> V

impl<T> WithSubscriber for T

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

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