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SourceIoThread

laminar_db::pipeline::source_adapter

Struct SourceIoThread 

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pub struct SourceIoThread {
    pub injector: CheckpointBarrierInjector,
    pub metrics: Arc<SourceIoMetrics>,
    pub checkpoint_rx: Receiver<SourceCheckpoint>,
    /* private fields */
}
Expand description

Bridges an async SourceConnector to a core thread’s SPSC inbox.

Runs a dedicated std::thread with a single-threaded tokio runtime. Polls the connector and pushes CoreMessage::Event into the target core’s inbox. Barrier detection is handled inline after each poll.

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§injector: CheckpointBarrierInjector

Barrier injector for this source (coordinator uses this to trigger barriers).

§metrics: Arc<SourceIoMetrics>

Lock-free metrics.

§checkpoint_rx: Receiver<SourceCheckpoint>

Watch receiver for checkpoint snapshots captured at barrier points.

Implementations§

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impl SourceIoThread

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pub fn spawn( source_idx: usize, name: String, connector: Box<dyn SourceConnector>, config: ConnectorConfig, target_inbox: Arc<SpscQueue<CoreMessage>>, max_poll_records: usize, fallback_poll_interval: Duration, core_thread: Thread, restore_checkpoint: Option<SourceCheckpoint>, delivery_guarantee: DeliveryGuarantee, ) -> Result<Self>

Spawn a new source I/O thread.

The thread opens the connector, polls for batches, and pushes events into the target core’s inbox. Barrier detection happens inline.

The core_thread handle is used to unpark() the core after each inbox push, waking it from park_timeout() sleep.

§Errors

Returns std::io::Error if the OS thread cannot be spawned.

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pub fn has_started(&self) -> bool

Returns true if the source successfully opened and restored.

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pub fn has_failed(&self) -> bool

Returns true if the source thread has exited without starting. This indicates a fatal startup failure (open or restore failed). Returns false if the thread is still running or started successfully.

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pub fn shutdown_and_join(&mut self) -> Option<Box<dyn SourceConnector>>

Signal shutdown and join the thread, returning the connector for cleanup.

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impl Drop for SourceIoThread

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fn drop(&mut self)

Executes the destructor for this type. Read more

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