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BatchPolicy

Struct BatchPolicy 

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pub struct BatchPolicy {
    pub max_rows: usize,
    pub max_latency: Duration,
    pub flush_on_watermark: bool,
}
Expand description

Controls when the bridge consumer flushes accumulated rows into a RecordBatch.

The consumer flushes when any of these conditions is met:

  • The row count reaches max_rows.
  • The time since the first row exceeds max_latency.
  • A watermark message arrives and flush_on_watermark is true.
  • A checkpoint barrier arrives (always flushes).
  • An EOF message arrives (always flushes).

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§max_rows: usize

Maximum number of rows before a flush.

§max_latency: Duration

Maximum time a row may wait before flushing.

§flush_on_watermark: bool

Whether a watermark advance triggers a flush of pending rows.

When true (the default), rows accumulated before a watermark are flushed as a batch before the watermark is forwarded to Ring 1. This prevents partial-batch emissions tied to arbitrary batch boundaries (Issue #55).

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impl BatchPolicy

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pub const fn with_max_rows(self, max_rows: usize) -> Self

Sets the maximum row count before a flush.

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pub const fn with_max_latency(self, max_latency: Duration) -> Self

Sets the maximum latency before a flush.

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pub const fn with_flush_on_watermark(self, flush_on_watermark: bool) -> Self

Sets whether watermark advances flush pending rows.

Trait Implementations§

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impl Clone for BatchPolicy

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fn clone(&self) -> BatchPolicy

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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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 Default for BatchPolicy

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fn default() -> Self

Returns the “default value” for a type. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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impl<T> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more
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