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SegmentContinuity

nodedb_wal::segment::continuity

Struct SegmentContinuity

pub struct SegmentContinuity { /* private fields */ }

Expand description

Running LSN boundary between the segments replayed so far.

Implementations§

impl SegmentContinuity

pub fn new() -> Self

Start a fresh check with no established boundary.

pub fn check(&self, segment: &SegmentMeta) -> Result<()>

Verify that segment continues the log where the previous completed segment left off. Call this before reading segment.

pub fn completed(&mut self, segment: &SegmentMeta, last_lsn: u64)

Record that segment was read all the way through, ending at last_lsn. Call this only after the segment has been fully consumed — a replay that stopped early (a record limit) has learned nothing about where the segment ends.

last_lsn must be the highest LSN the segment contains, not the highest one the caller kept: LSN filtering changes what is returned, not what is on disk. A last_lsn of 0 means the segment held no records.

Trait Implementations§

impl Debug for SegmentContinuity

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

Formats the value using the given formatter. Read more

impl Default for SegmentContinuity

fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

impl Freeze for SegmentContinuity

impl RefUnwindSafe for SegmentContinuity

impl Send for SegmentContinuity

impl Sync for SegmentContinuity

impl Unpin for SegmentContinuity

impl UnsafeUnpin for SegmentContinuity

impl UnwindSafe for SegmentContinuity

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> ArchivePointee for T

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.

impl<T> Borrow<T> for T
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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
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impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

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

impl<T> LayoutRaw for T

fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Returns the layout of the type.

impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
where T: SharedNiching<N1, N2>, N1: Niching<T>, N2: Niching<T>,

unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool

Returns whether the given value has been niched. Read more

fn resolve_niched(out: Place<NichedOption<T, N1>>)

Writes data to out indicating that a T is niched.

impl<T> Pointee for T

type Metadata = ()

The metadata type for pointers and references to this type.

impl<T> Read<Exclusive, BecauseExclusive> for T
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impl<T> Same for T

type Output = T

Should always be Self

impl<SS, SP> SupersetOf<SS> for SP
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fn to_subset(&self) -> Option<SS>

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Checks if self is actually part of its subset T (and can be converted to it).

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type Error = !

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fn try_from(value: U) -> Result<T, !>

Performs the conversion.

impl<T, U> TryInto<U> for T
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<V, T> VZip<V> for T
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fn vzip(self) -> V

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