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EventCounterProjection

allsource_core::application::services::projection

Struct EventCounterProjection 

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pub struct EventCounterProjection { /* private fields */ }
Expand description

Event counter projection - counts events by type

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impl EventCounterProjection

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pub fn new(name: impl Into<String>) -> Self

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pub fn get_count(&self, event_type: &str) -> u64

Get count for a specific event type

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pub fn get_all_counts(&self) -> Vec<(String, u64)>

Get all event type counts

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impl Projection for EventCounterProjection

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fn name(&self) -> &str

Get the name of this projection
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fn process(&self, event: &Event) -> Result<()>

Process an event and update the projection state
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fn get_state(&self, event_type: &str) -> Option<Value>

Get the current state of the projection for an entity
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fn clear(&self)

Clear all projection state
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fn snapshot(&self) -> Option<Value>

Snapshot the entire projection state for checkpointing. Returns None if the projection does not support checkpointing.
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fn restore(&self, snapshot: &Value) -> Result<()>

Restore projection state from a previously saved snapshot.

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