Package org.apache.flink.connector.file.table.stream

Class AbstractStreamingWriter<IN,OUT>

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

org.apache.flink.connector.file.table.stream.AbstractStreamingWriter<IN,OUT>

All Implemented Interfaces:

Serializable, CheckpointListener, BoundedOneInput, Input<IN>, KeyContext, KeyContextHandler, OneInputStreamOperator<IN,OUT>, StreamOperator<OUT>, StreamOperatorStateHandler.CheckpointedStreamOperator, YieldingOperator<OUT>

Direct Known Subclasses:

CompactFileWriter, StreamingFileWriter

public abstract class AbstractStreamingWriter<IN,OUT>
extends AbstractStreamOperator<OUT>
implements OneInputStreamOperator<IN,OUT>, BoundedOneInput

Operator for file system sink. It is a operator version of StreamingFileSink. It can send file and bucket information to downstream.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Buckets<IN,String>	buckets
protected long	currentWatermark

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

Constructor Summary

Constructors

Constructor	Description
AbstractStreamingWriter(long bucketCheckInterval, StreamingFileSink.BucketsBuilder<IN,String,? extends StreamingFileSink.BucketsBuilder<IN,String,?>> bucketsBuilder)

Method Summary

Modifier and Type	Method	Description
void	close()	This method is called at the very end of the operator's life, both in the case of a successful completion of the operation, and in the case of a failure and canceling.
protected void	commitUpToCheckpoint(long checkpointId)	Commit up to this checkpoint id.
void	endInput()	It is notified that no more data will arrive from the input.
void	initializeState(StateInitializationContext context)	Stream operators with state which can be restored need to override this hook method.
void	notifyCheckpointComplete(long checkpointId)	Notifies the listener that the checkpoint with the given checkpointId completed and was committed.
protected abstract void	onPartFileOpened(String partition, Path newPath)	Notifies a new file has been opened.
protected abstract void	partitionCreated(String partition)	Notifies a partition created.
protected abstract void	partitionInactive(String partition)	Notifies a partition become inactive.
void	processElement(StreamRecord<IN> element)	Processes one element that arrived on this input of the MultipleInputStreamOperator.
void	processWatermark(Watermark mark)	Processes a Watermark that arrived on the first input of this two-input operator.
void	snapshotState(StateSnapshotContext context)	Stream operators with state, which want to participate in a snapshot need to override this hook method.

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

finish, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, open, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, setProcessingTimeService, setup, snapshotState, useSplittableTimers

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.streaming.api.operators.Input

processLatencyMarker, processRecordAttributes, processWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

finish, getMetricGroup, getOperatorAttributes, getOperatorID, initializeState, open, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Field Detail

buckets

protected transient Buckets<IN,String> buckets

currentWatermark

protected transient long currentWatermark

Constructor Detail

AbstractStreamingWriter

public AbstractStreamingWriter(long bucketCheckInterval,
                               StreamingFileSink.BucketsBuilder<IN,String,? extends StreamingFileSink.BucketsBuilder<IN,String,?>> bucketsBuilder)

Method Detail

partitionCreated

protected abstract void partitionCreated(String partition)

Notifies a partition created.

partitionInactive

protected abstract void partitionInactive(String partition)

Notifies a partition become inactive. A partition becomes inactive after all the records received so far have been committed.

onPartFileOpened

protected abstract void onPartFileOpened(String partition,
                                         Path newPath)

Notifies a new file has been opened.

Note that this does not mean that the file has been created in the file system. It is only created logically and the actual file will be generated after it is committed.

commitUpToCheckpoint

protected void commitUpToCheckpoint(long checkpointId)
                             throws Exception

Commit up to this checkpoint id.

Throws:

Exception

initializeState

public void initializeState(StateInitializationContext context)
                     throws Exception

Description copied from class: AbstractStreamOperator

Stream operators with state which can be restored need to override this hook method.

Specified by:

initializeState in interface StreamOperatorStateHandler.CheckpointedStreamOperator

Overrides:

initializeState in class AbstractStreamOperator<OUT>

Parameters:

context - context that allows to register different states.

Throws:

Exception

snapshotState

public void snapshotState(StateSnapshotContext context)
                   throws Exception

Description copied from class: AbstractStreamOperator

Stream operators with state, which want to participate in a snapshot need to override this hook method.

Specified by:

snapshotState in interface StreamOperatorStateHandler.CheckpointedStreamOperator

Overrides:

snapshotState in class AbstractStreamOperator<OUT>

Parameters:

context - context that provides information and means required for taking a snapshot

Throws:

Exception

processWatermark

public void processWatermark(Watermark mark)
                      throws Exception

Description copied from interface: Input

Processes a Watermark that arrived on the first input of this two-input operator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processWatermark in interface Input<IN>

Overrides:

processWatermark in class AbstractStreamOperator<OUT>

Throws:

Exception

See Also:

Watermark

processElement

public void processElement(StreamRecord<IN> element)
                    throws Exception

Description copied from interface: Input

Processes one element that arrived on this input of the MultipleInputStreamOperator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processElement in interface Input<IN>

Throws:

Exception

notifyCheckpointComplete

public void notifyCheckpointComplete(long checkpointId)
                              throws Exception

Description copied from interface: CheckpointListener

Notifies the listener that the checkpoint with the given checkpointId completed and was committed.

These notifications are "best effort", meaning they can sometimes be skipped. To behave properly, implementers need to follow the "Checkpoint Subsuming Contract". Please see the class-level JavaDocs for details.

Please note that checkpoints may generally overlap, so you cannot assume that the notifyCheckpointComplete() call is always for the latest prior checkpoint (or snapshot) that was taken on the function/operator implementing this interface. It might be for a checkpoint that was triggered earlier. Implementing the "Checkpoint Subsuming Contract" (see above) properly handles this situation correctly as well.

Please note that throwing exceptions from this method will not cause the completed checkpoint to be revoked. Throwing exceptions will typically cause task/job failure and trigger recovery.

Specified by:

notifyCheckpointComplete in interface CheckpointListener

Overrides:

notifyCheckpointComplete in class AbstractStreamOperator<OUT>

Parameters:

checkpointId - The ID of the checkpoint that has been completed.

Throws:

Exception - This method can propagate exceptions, which leads to a failure/recovery for the task. Note that this will NOT lead to the checkpoint being revoked.

endInput

public void endInput()
              throws Exception

Description copied from interface: BoundedOneInput

It is notified that no more data will arrive from the input.

WARNING: It is not safe to use this method to commit any transactions or other side effects! You can use this method to flush any buffered data that can later on be committed e.g. in a CheckpointListener.notifyCheckpointComplete(long).

NOTE: Given it is semantically very similar to the StreamOperator.finish() method. It might be dropped in favour of the other method at some point in time.

Specified by:

endInput in interface BoundedOneInput

Throws:

Exception

close

public void close()
           throws Exception

Description copied from interface: StreamOperator

This method is called at the very end of the operator's life, both in the case of a successful completion of the operation, and in the case of a failure and canceling.

This method is expected to make a thorough effort to release all resources that the operator has acquired.

NOTE:It can not emit any records! If you need to emit records at the end of processing, do so in the StreamOperator.finish() method.

Specified by:

close in interface StreamOperator<IN>

Overrides:

close in class AbstractStreamOperator<OUT>

Throws:

Exception