Struct Selector 

pub struct Selector {
    pub instance_key: Option<[u8; 16]>,
    pub seq_from: Option<u64>,
    pub seq_to: Option<u64>,
    pub time_from: Option<SystemTime>,
    pub time_to: Option<SystemTime>,
    pub after: Option<Cursor>,
    pub limit: Option<usize>,
}

A read selector for crate::DurabilityStore::query. All filters are optional and combine with AND. after + limit drive pagination.

An empty selector (Selector::default()) plus paging therefore yields the full contracted history for a topic, ordered by (instance_key, sequence).

Fields

instance_key: Option<[u8; 16]>

Restrict to a single instance.

seq_from: Option<u64>

Inclusive lower sequence bound.

seq_to: Option<u64>

Inclusive upper sequence bound.

time_from: Option<SystemTime>

Inclusive lower created_at bound.

time_to: Option<SystemTime>

Inclusive upper created_at bound.

after: Option<Cursor>

Return only samples strictly after this (instance_key, sequence).

limit: Option<usize>

Maximum samples in the returned page. None = adapter default.

Implementations

impl Selector

pub fn after_cursor(&self, cursor: Cursor) -> Self

Builds the selector for the next page after a returned Cursor, preserving the filter predicate but advancing the pagination anchor.

pub fn matches(&self, sample: &DurabilitySample) -> bool

Returns true if sample matches the filter predicate (ignores after/limit, which are pagination, not predicate).

Trait Implementations

impl Clone for Selector

fn clone(&self) -> Selector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Selector

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

Formats the value using the given formatter.

impl Default for Selector

fn default() -> Selector

Returns the “default value” for a type.