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EventGraph

varpulis_runtime::greta

Struct EventGraph 

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

The GRETA event graph for a single partition/window

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impl EventGraph

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pub fn new(num_queries: usize) -> Self

Create a new event graph

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pub fn add_event(&mut self, event: SharedEvent, type_index: u16) -> NodeId

Add an event to the graph

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pub fn node(&self, id: NodeId) -> Option<&EventNode>

Get a node by ID

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pub fn node_mut(&mut self, id: NodeId) -> Option<&mut EventNode>

Get a mutable node by ID

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pub fn nodes_of_type(&self, type_index: u16) -> &[NodeId] ⓘ

Get all nodes of a specific type

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pub fn propagate_counts(&mut self, query: QueryId)

Propagate counts for a query (GRETA core algorithm)

For each event e: count(e, q) = start(e, q) + Σ count(e’, q) for all predecessors e’

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pub fn final_count(&self, query: QueryId) -> u64

Get the final aggregated count for a query

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pub fn clear(&mut self)

Clear the graph for reuse

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pub const fn len(&self) -> usize

Number of nodes in the graph

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pub const fn is_empty(&self) -> bool

Check if graph is empty

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impl Debug for EventGraph

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

Formats the value using the given formatter. Read more

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