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SessionWindowAssigner

scirs2_io::streaming::windows

Struct SessionWindowAssigner 

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

Assigns events to dynamically-sized session windows based on inactivity gaps.

The assigner tracks the last observed timestamp per key (or a single global session when no key is used). Call assign_windows for keyed semantics; use "" as the key for an un-keyed stream.

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impl SessionWindowAssigner

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pub fn new(gap_ms: u64) -> Self

Create a new session window assigner.

  • gap_ms – inactivity gap in milliseconds; a gap longer than this closes the current session and starts a new one.
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pub fn assign_keyed(&mut self, key: &str, event_time_ms: i64) -> WindowBound

Assign a window for an event associated with key.

Returns None if the session is still open (no window emitted yet). When the session is extended, the window bound returned covers the entire session so far.

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impl Clone for SessionWindowAssigner

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fn clone(&self) -> SessionWindowAssigner

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SessionWindowAssigner

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

Formats the value using the given formatter. Read more
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impl WindowAssigner for SessionWindowAssigner

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fn assign_windows(&self, _event_time_ms: i64) -> Vec<WindowBound>

Return the list of WindowBounds the event belongs to.

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