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WindowStore

krabka_client_streams::store::window

Trait WindowStore 

Source 
pub trait WindowStore<K: Send + Sync, V: Send>: StateStore {
    // Required methods
    fn fetch_single<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 K,
        window_start: i64,
    ) -> Pin<Box<dyn Future<Output = Option<(i64, V)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn fetch<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 K,
        time_from: i64,
        time_to: i64,
    ) -> Pin<Box<dyn Future<Output = Vec<(i64, V)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn fetch_with_ts<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 K,
        time_from: i64,
        time_to: i64,
    ) -> Pin<Box<dyn Future<Output = Vec<(i64, i64, V)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn fetch_all_in_range<'life0, 'async_trait>(
        &'life0 self,
        start_from: i64,
        start_to: i64,
    ) -> Pin<Box<dyn Future<Output = Vec<(K, i64, i64, V)>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn put<'life0, 'async_trait>(
        &'life0 mut self,
        key: K,
        window_start: i64,
        value: V,
        record_ts: i64,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}
Expand description

Typed windowed store keyed by (K, windowStart).

The store holds V and a record timestamp. fetch_single returns (storedTs, V), so the aggregator can compute newTs = max(recordTs, storedTs).

Required Methods§

Source

fn fetch_single<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 K, window_start: i64, ) -> Pin<Box<dyn Future<Output = Option<(i64, V)>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Source

fn fetch<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 K, time_from: i64, time_to: i64, ) -> Pin<Box<dyn Future<Output = Vec<(i64, V)>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Source

fn fetch_with_ts<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 K, time_from: i64, time_to: i64, ) -> Pin<Box<dyn Future<Output = Vec<(i64, i64, V)>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Like fetch, but also returns each window’s stored record timestamp.

The result is (windowStart, recordTs, value). The sliding-window aggregator uses this method, because it needs windowMaxRecordTimestamp to place the left and right windows.

Source

fn fetch_all_in_range<'life0, 'async_trait>( &'life0 self, start_from: i64, start_to: i64, ) -> Pin<Box<dyn Future<Output = Vec<(K, i64, i64, V)>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Returns every window across ALL keys whose windowStart is in [start_from, start_to].

The result is (key, windowStart, recordTs, value). The emit-final closed-window scan uses this method. The byte layout is key-prefixed, so this is a filtered full scan that mirrors the JVM fetchAll.

Source

fn put<'life0, 'async_trait>( &'life0 mut self, key: K, window_start: i64, value: V, record_ts: i64, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§

Source§

impl<K: Send + Sync + 'static, V: Send + 'static> WindowStore<K, V> for WindowBytesStore<K, V>