Trait KeyExtractor 

pub trait KeyExtractor<T> {
    // Required method
    fn extract_key(&self, event: &T) -> EventKey;
}

Trait for extracting aggregation keys from events

Implement this trait to define how to extract the aggregation key from your event type. This is used for grouping events in stream processing operations.

Required Methods

fn extract_key(&self, event: &T) -> EventKey

Extract the aggregation key from the event

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl KeyExtractor<CloudEvent> for CloudEventKeyExtractor

impl KeyExtractor<FeedbackEvent> for FeedbackEventKeyExtractor

impl KeyExtractor<MetricPoint> for MetricPointKeyExtractor