Struct ArrowWindow 

pub struct ArrowWindow<IN, OUT, F, B>
where
    IN: ArconType + ToArrow,
    OUT: ArconType,
    F: Fn(Arc<Schema>, Vec<RecordBatch>) -> ArconResult<OUT> + ArconFnBounds,
    B: Backend,
{ /* private fields */ }

A window index for Arrow Data

Elements are appended into RecordBatches and once a window is triggered, the underlying Arrow Schema and Vec is exposed.

Implementations

impl<IN, OUT, F, B> ArrowWindow<IN, OUT, F, B>

where IN: ArconType + ToArrow, OUT: ArconType, F: Fn(Arc<Schema>, Vec<RecordBatch>) -> ArconResult<OUT> + ArconFnBounds, B: Backend,

pub fn new(backend: Arc<B>, udf: F) -> Self

Trait Implementations

impl<IN, OUT, F, B> IndexOps for ArrowWindow<IN, OUT, F, B>

where IN: ArconType + ToArrow, OUT: ArconType, F: Fn(Arc<Schema>, Vec<RecordBatch>) -> ArconResult<OUT> + ArconFnBounds, B: Backend,

fn persist(&mut self) -> ArconResult<()>

This method ensures all non-persisted data gets pushed to a Backend

fn set_key(&mut self, _: u64)

Set the current active key for the index

fn table(&mut self) -> ArconResult<Option<ImmutableTable>>

Create a [ImmutableTable] from the data in the Index

impl<IN, OUT, F, B> WindowIndex for ArrowWindow<IN, OUT, F, B>

where IN: ArconType + ToArrow, OUT: ArconType, F: Fn(Arc<Schema>, Vec<RecordBatch>) -> ArconResult<OUT> + ArconFnBounds, B: Backend,

type IN = IN

type OUT = OUT

fn on_element( &mut self, element: Self::IN, ctx: WindowContext, ) -> ArconResult<()>

The on_element function is called per received window element

fn result(&mut self, ctx: WindowContext) -> ArconResult<Self::OUT>

The result function is called at the end of a window’s lifetime

fn clear(&mut self, ctx: WindowContext) -> ArconResult<()>

Clears the window state for the passed context