Struct AttentionEventId 

pub struct AttentionEventId(/* private fields */);

Stable identity of one projected reason to look at a ceremony.

Derived from the record that produced it, so replaying the feed after a restart produces the same identity and the ledger recognises the item it already holds instead of delivering it twice.

Implementations

impl AttentionEventId

pub fn new(raw: impl Into<String>) -> Result<Self, DomainError>

Validate an identifier read back from storage or a host payload.

pub fn derive( ceremony_id: &CeremonyId, position: GlobalPosition, source_event_id: &str, kind: AttentionKind, ) -> Result<Self, DomainError>

The identity the projection deduplicates on.

The position is in it because the ledger holds identities and the loop has to hand a host the event itself. Carrying where the record sits turns that into one bounded read at a known position, instead of a scan for an event id the store has no index for. It is as stable as the rest: a record’s place in the global order does not move, so replaying the feed still derives the same identity.

pub fn source_position( &self, ceremony_id: &CeremonyId, ) -> Option<GlobalPosition>

Where in the global feed the record behind this sits.

The ceremony has to be supplied because a ceremony identifier may itself contain a colon, so the prefix is known rather than guessed. None means the identity was not derived by this build — an identifier read back from a host, say — and the caller has to go and look the ordinary way.

pub fn as_str(&self) -> &str

Trait Implementations

impl Clone for AttentionEventId

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttentionEventId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AttentionEventId

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for AttentionEventId

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

Formats the value using the given formatter.

impl Eq for AttentionEventId

impl Hash for AttentionEventId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for AttentionEventId

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for AttentionEventId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for AttentionEventId

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for AttentionEventId

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 AttentionEventId