Struct EventCursor 

pub struct EventCursor { /* private fields */ }

A consumer’s durable position in the event feed.

VaultEventEnvelope::sequence restarts at zero every time the host starts, so a bare sequence number persisted across a restart is worse than keeping no record at all: it looks comparable to the new run’s numbering and is not. Pairing the sequence with the epoch that issued it turns that silent mis-resume into a question a plugin can answer — Self::resumes_on.

Serializable, so it stores directly through crate::PluginStorage.

Implementations

impl EventCursor

pub fn after(envelope: &VaultEventEnvelope) -> Self

The position immediately after envelope has been applied.

pub fn epoch(&self) -> &str

The bus run that issued Self::sequence.

pub fn sequence(&self) -> u64

The last applied sequence within Self::epoch.

pub fn resumes_on(&self, bus: &HookBus) -> bool

Whether this position still means something on bus.

false after a host restart, which is the case worth handling: the plugin cannot know what changed while it was down, so it must reconcile from crate::VaultApi::list_notes_detailed before trusting the feed.

true is not a promise that nothing was missed — a subscriber can still fall behind within a run, which arrives separately as HookRecvError::Lagged.

Trait Implementations

impl Clone for EventCursor

fn clone(&self) -> EventCursor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventCursor

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EventCursor

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for EventCursor

impl PartialEq for EventCursor

fn eq(&self, other: &EventCursor) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for EventCursor

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for EventCursor