risingwave_stream::executor::source

Struct StreamSourceCore

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pub struct StreamSourceCore<S: StateStore> {
    pub(crate) source_id: TableId,
    pub(crate) source_name: String,
    pub(crate) column_ids: Vec<ColumnId>,
    pub(crate) source_desc_builder: Option<SourceDescBuilder>,
    pub(crate) latest_split_info: HashMap<SplitId, SplitImpl>,
    pub(crate) split_state_store: SourceStateTableHandler<S>,
    pub(crate) updated_splits_in_epoch: HashMap<SplitId, SplitImpl>,
}
Expand description

StreamSourceCore stores the necessary information for the source executor to execute on the external connector.

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§source_id: TableId§source_name: String§column_ids: Vec<ColumnId>§source_desc_builder: Option<SourceDescBuilder>

source_desc_builder will be taken (mem::take) on execution. A SourceDesc (currently named SourceDescV2) will be constructed and used for execution.

§latest_split_info: HashMap<SplitId, SplitImpl>

Split info for stream source. A source executor might read data from several splits of external connector.

§split_state_store: SourceStateTableHandler<S>

Stores information of the splits.

§updated_splits_in_epoch: HashMap<SplitId, SplitImpl>

Contains the latests offsets for the splits that are updated in the current epoch. It is cleared after each barrier.

Source messages will only write the cache. It is read on split change and rebuild stream reader on error.

Implementations§

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impl<S> StreamSourceCore<S>
where S: StateStore,

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pub fn new( source_id: TableId, source_name: String, column_ids: Vec<ColumnId>, source_desc_builder: SourceDescBuilder, split_state_store: SourceStateTableHandler<S>, ) -> Self

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pub fn init_split_state(&mut self, splits: Vec<SplitImpl>)

Auto Trait Implementations§

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impl<S> !Freeze for StreamSourceCore<S>

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impl<S> !RefUnwindSafe for StreamSourceCore<S>

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impl<S> Send for StreamSourceCore<S>

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impl<S> Sync for StreamSourceCore<S>

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impl<S> Unpin for StreamSourceCore<S>
where <S as StateStore>::Local: Unpin, S: Unpin,

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impl<S> !UnwindSafe for StreamSourceCore<S>

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