Struct mz_persist_client::internal::state::State

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pub struct State<T> {
    pub(crate) applier_version: Version,
    pub(crate) shard_id: ShardId,
    pub(crate) seqno: SeqNo,
    pub(crate) walltime_ms: u64,
    pub(crate) hostname: String,
    pub(crate) collections: StateCollections<T>,
}

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§applier_version: Version§shard_id: ShardId§seqno: SeqNo§walltime_ms: u64

A strictly increasing wall time of when this state was written, in milliseconds since the unix epoch.

§hostname: String

Hostname of the persist user that created this version of state. For debugging.

§collections: StateCollections<T>

Implementations§

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impl<T> State<T>
where T: Timestamp + Lattice + Codec64,

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pub fn shard_id(&self) -> ShardId

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pub fn seqno(&self) -> SeqNo

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pub fn since(&self) -> &Antichain<T>

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pub fn upper(&self) -> &Antichain<T>

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pub fn spine_batch_count(&self) -> usize

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pub fn size_metrics(&self) -> StateSizeMetrics

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pub fn latest_rollup(&self) -> (&SeqNo, &HollowRollup)

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pub(crate) fn seqno_since(&self) -> SeqNo

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pub fn maybe_gc(&mut self, is_write: bool) -> Option<GcReq>

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pub fn seqnos_held(&self) -> usize

Return the number of gc-ineligible state versions.

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pub fn expire_at(&mut self, walltime_ms: EpochMillis) -> ExpiryMetrics

Expire all readers and writers up to the given walltime_ms.

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pub fn snapshot( &self, as_of: &Antichain<T>, ) -> Result<Vec<HollowBatch<T>>, SnapshotErr<T>>

Returns the batches that contain updates up to (and including) the given as_of. The result Vec contains blob keys, along with a Description of what updates in the referenced parts are valid to read.

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pub fn verify_listen( &self, as_of: &Antichain<T>, ) -> Result<Result<(), Upper<T>>, Since<T>>

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pub fn next_listen_batch( &self, frontier: &Antichain<T>, ) -> Result<HollowBatch<T>, SeqNo>

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pub fn need_rollup(&self, threshold: usize) -> Option<SeqNo>

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pub(crate) fn blobs(&self) -> impl Iterator<Item = HollowBlobRef<'_, T>>

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impl<T: Timestamp + Lattice + Codec64> State<T>

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pub fn apply_encoded_diffs<'a, I: IntoIterator<Item = &'a VersionedData>>( &mut self, cfg: &PersistConfig, metrics: &Metrics, diffs: I, )

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impl<T: Timestamp + Lattice + Codec64> State<T>

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pub fn apply_diffs<I: IntoIterator<Item = (StateDiff<T>, Bytes)>>( &mut self, metrics: &Metrics, diffs: I, )

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pub(super) fn apply_diff( &mut self, metrics: &Metrics, diff: StateDiff<T>, ) -> Result<(), String>

Trait Implementations§

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impl<T: Clone> Clone for State<T>

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

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<T: Debug> Debug for State<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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impl<T: PartialEq> PartialEq for State<T>

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fn eq(&self, other: &State<T>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: Serialize + Timestamp + Lattice> Serialize for State<T>

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fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer. Read more
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impl<T> StructuralPartialEq for State<T>

Auto Trait Implementations§

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impl<T> Freeze for State<T>
where T: Freeze,

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impl<T> RefUnwindSafe for State<T>
where T: RefUnwindSafe,

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impl<T> Send for State<T>
where T: Send + Sync,

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impl<T> Sync for State<T>
where T: Sync + Send,

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impl<T> Unpin for State<T>
where T: Unpin,

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impl<T> UnwindSafe for State<T>

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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> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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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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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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

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const ALIGN: usize = _

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