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 list. If limitedNum is set, the reader will stop reading at the limitedNum position until the checkpoint or savepoint triggered.

Constructor Summary

Constructors

Constructor and Description
FromElementsSourceReader(Integer limitedNum, List<T> elements, org.apache.flink.api.connector.source.Boundedness boundedness, org.apache.flink.api.connector.source.SourceReaderContext context)

Method Summary

Modifier and Type	Method and 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.connector.source.SourceReader

handleSourceEvents, pauseOrResumeSplits

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

notifyCheckpointAborted

Constructor Detail

FromElementsSourceReader

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

Method Detail

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