Package org.apache.flink.connector.testframe.source

Class FromElementsSourceReader<T>

java.lang.Object

org.apache.flink.connector.testframe.source.FromElementsSourceReader<T>

All Implemented Interfaces:

AutoCloseable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

public class FromElementsSourceReader<T>
extends Object
implements org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

A SourceReader implementation that reads data from a FromElementsSource.ElementsSupplier. If limitedNum is set, the reader will stop reading at the limitedNum position until the checkpoint or savepoint triggered.

Constructor Summary

Constructors

Constructor	Description
FromElementsSourceReader(Integer limitedNum, FromElementsSource.ElementsSupplier<T> elementsSupplier, org.apache.flink.api.connector.source.Boundedness boundedness, org.apache.flink.api.connector.source.SourceReaderContext context)

Method Summary

Modifier and Type	Method	Description
void	addSplits(List<FromElementsSplit> splits)
void	close()
CompletableFuture<Void>	isAvailable()
void	notifyCheckpointComplete(long checkpointId)
void	notifyNoMoreSplits()
org.apache.flink.core.io.InputStatus	pollNext(org.apache.flink.api.connector.source.ReaderOutput<T> output)
List<FromElementsSplit>	snapshotState(long checkpointId)
void	start()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted

Methods inherited from interface org.apache.flink.api.connector.source.SourceReader

handleSourceEvents, pauseOrResumeSplits

Constructor Details

FromElementsSourceReader

public FromElementsSourceReader(Integer limitedNum,
 FromElementsSource.ElementsSupplier<T> elementsSupplier,
 org.apache.flink.api.connector.source.Boundedness boundedness,
 org.apache.flink.api.connector.source.SourceReaderContext context)

Method Details

start

public void start()

Specified by:

start in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

pollNext

public org.apache.flink.core.io.InputStatus pollNext(org.apache.flink.api.connector.source.ReaderOutput<T> output)
                                              throws Exception

Specified by:

pollNext in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

Throws:

Exception

snapshotState

public List<FromElementsSplit> snapshotState(long checkpointId)

Specified by:

snapshotState in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

isAvailable

public CompletableFuture<Void> isAvailable()

Specified by:

isAvailable in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

addSplits

public void addSplits(List<FromElementsSplit> splits)

Specified by:

addSplits in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

notifyNoMoreSplits

public void notifyNoMoreSplits()

Specified by:

notifyNoMoreSplits in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception

notifyCheckpointComplete

public void notifyCheckpointComplete(long checkpointId)
                              throws Exception

Specified by:

notifyCheckpointComplete in interface org.apache.flink.api.common.state.CheckpointListener

Specified by:

notifyCheckpointComplete in interface org.apache.flink.api.connector.source.SourceReader<T,FromElementsSplit>

Throws:

Exception