Struct WindowOperator 

pub struct WindowOperator<T, A, E>
where
    T: Send + Sync + Clone,
    A: WindowAssigner + Send + Sync,
    E: EventTimeExtractor<T> + Send + Sync,
{ /* private fields */ }

Window operator - assigns events to windows

Example

use processor::pipeline::operator::WindowOperator;
use processor::window::{TumblingWindowAssigner, WindowAssigner};
use processor::core::EventTimeExtractor;
use std::time::Duration;

// Define a time extractor
struct MyTimeExtractor;
impl EventTimeExtractor<i64> for MyTimeExtractor {
    fn extract_event_time(&self, event: &i64) -> chrono::DateTime<chrono::Utc> {
        chrono::DateTime::from_timestamp(*event, 0).unwrap()
    }
}

let assigner = TumblingWindowAssigner::new(Duration::from_secs(60));
let operator = WindowOperator::new("windows", assigner, MyTimeExtractor);

Implementations

impl<T, A, E> WindowOperator<T, A, E>

where T: Send + Sync + Clone + DeserializeOwned, A: WindowAssigner + Send + Sync, E: EventTimeExtractor<T> + Send + Sync,

pub fn new<S: Into<String>>(name: S, assigner: A, time_extractor: E) -> Self

Create a new window operator

pub fn assign_windows(&self, event: &T, _key: &str) -> Vec<Window>

Assign an event to windows

Trait Implementations

impl<T, A, E> Debug for WindowOperator<T, A, E>

where T: Send + Sync + Clone, A: WindowAssigner + Send + Sync, E: EventTimeExtractor<T> + Send + Sync,

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

Formats the value using the given formatter.

impl<T, A, E> StreamOperator for WindowOperator<T, A, E>

where T: Send + Sync + Clone + DeserializeOwned + Serialize, A: WindowAssigner + Send + Sync, E: EventTimeExtractor<T> + Send + Sync,

fn process<'life0, 'life1, 'async_trait>( &'life0 self, input: Vec<u8>, _ctx: &'life1 OperatorContext, ) -> Pin<Box<dyn Future<Output = Result<Vec<Vec<u8>>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Process an event and return transformed events

fn name(&self) -> &str

Get the operator name

fn open<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Called when the operator is initialized

fn close<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Called when the operator is shut down