pub fn create_source_simple<G, C>(
    config: SourceConfig<G>,
    connector: C,
) -> (
    (
        timely::dataflow::Stream<G, (Row, Timestamp, Diff)>,
        timely::dataflow::Stream<G, SourceError>,
    ),
    Option<SourceToken>,
)
where
    G: Scope<Timestamp = Timestamp>,
    C: SimpleSource + Send + 'static,
{
    let SourceConfig {
        id,
        name,
        upstream_name,
        scope,
        active,
        worker_id,
        timestamp_frequency,
        logger,
        now,
        base_metrics,
        ..
    } = config;

    let (tx, mut rx) = mpsc::channel(64);

    if active {
        tokio::spawn(async move {
            let timestamper = Timestamper::new(tx, timestamp_frequency, now);
            let source = connector.start(&timestamper);
            tokio::pin!(source);

            loop {
                tokio::select! {
                    res = timestamper.tick() => {
                        if res.is_err() {
                            break;
                        }
                    }
                    res = &mut source => {
                        if let Err(err) = res {
                            let _ = timestamper.error(err).await;
                        }
                        break;
                    }
                }
            }
        });
    }

    let (stream, _secondary_stream, capability) = source(scope, name.clone(), move |info| {
        let activator = Arc::new(scope.sync_activator_for(&info.address[..]));

        let metrics_name = upstream_name.unwrap_or(name);
        let mut metrics = SourceMetrics::new(
            &base_metrics,
            &metrics_name,
            id,
            &worker_id.to_string(),
            logger,
        );

        if active {
            metrics.add_partition(&PartitionId::None);
        }

        move |cap,
              _secondary_cap: &mut Capability<Timestamp>,
              output,
              _secondary_output: &mut OutputHandle<Timestamp, (), _>| {
            if !active {
                return SourceStatus::Done;
            }

            let waker = futures::task::waker_ref(&activator);
            let mut context = Context::from_waker(&waker);

            while let Poll::Ready(item) = rx.poll_recv(&mut context) {
                match item {
                    Some(Event::Progress(None)) => unreachable!(),
                    Some(Event::Progress(Some(time))) => {
                        let mut metric_updates = HashMap::new();
                        metric_updates.insert(
                            PartitionId::None,
                            (
                                MzOffset {
                                    offset: time as i64,
                                },
                                time,
                            ),
                        );
                        metrics.record_partition_offsets(metric_updates);
                        cap.downgrade(&time);
                    }
                    Some(Event::Message(time, data)) => {
                        output.session(&cap.delayed(&time)).give(data);
                    }
                    None => {
                        return SourceStatus::Done;
                    }
                }
            }

            return SourceStatus::Alive;
        }
    });

    (
        stream.map_fallible("SimpleSourceErrorDemux", |r| r),
        Some(capability),
    )
}
/// Creates a source dataflow operator from a connector implementing [SimpleSource](SimpleSource)
Creates a source dataflow operator from a connector implementing [SimpleSource](SimpleSource)
Creates a source dataflow operator from a connector implementing [ SimpleSource ] ( SimpleSource )
pub fn create_source_simple<G, C>(
    config: SourceConfig<G>,
    connector: C,
) -> (
    (
        timely::dataflow::Stream<G, (Row, Timestamp, Diff)>,
        timely::dataflow::Stream<G, SourceError>,
    ),
    Option<SourceToken>,
)
where
    G: Scope<Timestamp = Timestamp>,
    C: SimpleSource + Send + 'static,
{
    let SourceConfig {
        id,
        name,
        upstream_name,
        scope,
        active,
        worker_id,
        timestamp_frequency,
        logger,
        now,
        base_metrics,
        ..
    } = config;
    let (tx, mut rx) = mpsc::channel(64);
    if active {
        tokio::spawn(async move {
            let timestamper = Timestamper::new(tx, timestamp_frequency, now);
            let source = connector.start(&timestamper);
            tokio::pin!(source);
            loop {
                tokio::select! {
                    res = timestamper.tick() => {
                        if res.is_err() {
                            break;
                        }
                    }
                    res = &mut source => {
                        if let Err(err) = res {
                            let _ = timestamper.error(err).await;
                        }
                        break;
                    }
                }
            }
        });
    }
    let (stream, _secondary_stream, capability) = source(scope, name.clone(), move |info| {
        let activator = Arc::new(scope.sync_activator_for(&info.address[..]));
        let metrics_name = upstream_name.unwrap_or(name);
        let mut metrics = SourceMetrics::new(
            &base_metrics,
            &metrics_name,
            id,
            &worker_id.to_string(),
            logger,
        );
        if active {
            metrics.add_partition(&PartitionId::None);
        }
        move |cap,
              _secondary_cap: &mut Capability<Timestamp>,
              output,
              _secondary_output: &mut OutputHandle<Timestamp, (), _>| {
            if !active {
                return SourceStatus::Done;
            }
            let waker = futures::task::waker_ref(&activator);
            let mut context = Context::from_waker(&waker);
            while let Poll::Ready(item) = rx.poll_recv(&mut context) {
                match item {
                    Some(Event::Progress(None)) => unreachable!(),
                    Some(Event::Progress(Some(time))) => {
                        let mut metric_updates = HashMap::new();
                        metric_updates.insert(
                            PartitionId::None,
                            (
                                MzOffset {
                                    offset: time as i64,
                                },
                                time,
                            ),
                        );
                        metrics.record_partition_offsets(metric_updates);
                        cap.downgrade(&time);
                    }
                    Some(Event::Message(time, data)) => {
                        output.session(&cap.delayed(&time)).give(data);
                    }
                    None => {
                        return SourceStatus::Done;
                    }
                }
            }
            return SourceStatus::Alive;
        }
    });
    (
        stream.map_fallible("SimpleSourceErrorDemux", |r| r),
        Some(capability),
    )
}
pub fn create_source_simple < G , C > ( config : SourceConfig < G > , connector : C , ) -> ( ( timely :: dataflow :: Stream < G , ( Row , Timestamp , Diff ) > , timely :: dataflow :: Stream < G , SourceError > , ) , Option < SourceToken > , ) where G : Scope < Timestamp = Timestamp > , C : SimpleSource + Send + ' static , { let SourceConfig { id , name , upstream_name , scope , active , worker_id , timestamp_frequency , logger , now , base_metrics , .. } = config ; let ( tx , mut rx ) = mpsc :: channel ( 64 ) ; if active { tokio :: spawn ( async move { let timestamper = Timestamper :: new ( tx , timestamp_frequency , now ) ; let source = connector . start ( & timestamper ) ; tokio :: pin ! ( source ) ; loop { tokio :: select ! { res timestamper tick ( ) { if res is_err ( ) { break } } res mut source { if let Err ( err ) res { let timestamper error ( err ) await } break } } } } ) ; } let ( stream , _secondary_stream , capability ) = source ( scope , name . clone ( ) , move | info | { let activator = Arc :: new ( scope . sync_activator_for ( & info . address [ .. ] ) ) ; let metrics_name = upstream_name . unwrap_or ( name ) ; let mut metrics = SourceMetrics :: new ( & base_metrics , & metrics_name , id , & worker_id . to_string ( ) , logger , ) ; if active { metrics . add_partition ( & PartitionId :: None ) ; } move | cap , _secondary_cap : & mut Capability < Timestamp > , output , _secondary_output : & mut OutputHandle < Timestamp , ( ) , _ > | { if ! active { return SourceStatus :: Done ; } let waker = futures :: task :: waker_ref ( & activator ) ; let mut context = Context :: from_waker ( & waker ) ; while let Poll :: Ready ( item ) = rx . poll_recv ( & mut context ) { match item { Some ( Event :: Progress ( None ) ) => unreachable ! ( ) , Some ( Event :: Progress ( Some ( time ) ) ) => { let mut metric_updates = HashMap :: new ( ) ; metric_updates . insert ( PartitionId :: None , ( MzOffset { offset : time as i64 , } , time , ) , ) ; metrics . record_partition_offsets ( metric_updates ) ; cap . downgrade ( & time ) ; } Some ( Event :: Message ( time , data ) ) => { output . session ( & cap . delayed ( & time ) ) . give ( data ) ; } None => { return SourceStatus :: Done ; } } } return SourceStatus :: Alive ; } } ) ; ( stream . map_fallible ( " " , | r | r ) , Some ( capability ) , ) }
Creates a source dataflow operator from a connector implementing [SimpleSource](SimpleSource)
Creates a source dataflow operator from a connector implementing [ SimpleSource ] ( SimpleSource )
config
SourceConfig<G>
connector
C
config
SourceConfig<G>
connector
C