@Internal public class CompactCoordinator extends AbstractStreamOperator<CompactorRequest> implements OneInputStreamOperator<CommittableMessage<FileSinkCommittable>,CompactorRequest>, BoundedOneInput
FileSink.
All committable emitted from the writers are collected and packed into CompactorRequests. The FileCompactStrategy defines when the requests can be fired. When
a firing condition is met, the requests will be sent to the CompactorOperator.
The CompactCoordinator stores the non-fired committable as its state, and may emit a
request at any time. A CompactorOperator must ensure that the ownership of the
committable in a compact request is successfully handed from the coordinator, before it can
actually perform the compaction.
chainingStrategy, config, latencyStats, LOG, metrics, output, processingTimeService| Constructor and Description |
|---|
CompactCoordinator(FileCompactStrategy strategy,
SimpleVersionedSerializer<FileSinkCommittable> committableSerializer) |
| Modifier and Type | Method and Description |
|---|---|
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 |
prepareSnapshotPreBarrier(long checkpointId)
This method is called when the operator should do a snapshot, before it emits its own
checkpoint barrier.
|
void |
processElement(StreamRecord<CommittableMessage<FileSinkCommittable>> element)
Processes one element that arrived on this input of the
MultipleInputStreamOperator. |
void |
snapshotState(StateSnapshotContext context)
Stream operators with state, which want to participate in a snapshot need to override this
hook method.
|
close, finish, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, open, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotStateclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitsetKeyContextElementclose, finish, getMetricGroup, getOperatorID, initializeState, open, setKeyContextElement1, setKeyContextElement2, snapshotStatenotifyCheckpointAborted, notifyCheckpointCompletegetCurrentKey, setCurrentKeyprocessLatencyMarker, processWatermark, processWatermarkStatushasKeyContextpublic CompactCoordinator(FileCompactStrategy strategy, SimpleVersionedSerializer<FileSinkCommittable> committableSerializer)
public void processElement(StreamRecord<CommittableMessage<FileSinkCommittable>> element) throws Exception
InputMultipleInputStreamOperator.
This method is guaranteed to not be called concurrently with other methods of the operator.processElement in interface Input<CommittableMessage<FileSinkCommittable>>Exceptionpublic void endInput()
throws Exception
BoundedOneInputWARNING: 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.
endInput in interface BoundedOneInputExceptionpublic void prepareSnapshotPreBarrier(long checkpointId)
throws Exception
StreamOperatorThis method is intended not for any actual state persistence, but only for emitting some data before emitting the checkpoint barrier. Operators that maintain some small transient state that is inefficient to checkpoint (especially when it would need to be checkpointed in a re-scalable way) but can simply be sent downstream before the checkpoint. An example are opportunistic pre-aggregation operators, which have small the pre-aggregation state that is frequently flushed downstream.
Important: This method should not be used for any actual state snapshot logic, because it will inherently be within the synchronous part of the operator's checkpoint. If heavy work is done within this method, it will affect latency and downstream checkpoint alignments.
prepareSnapshotPreBarrier in interface StreamOperator<CompactorRequest>prepareSnapshotPreBarrier in class AbstractStreamOperator<CompactorRequest>checkpointId - The ID of the checkpoint.Exception - Throwing an exception here causes the operator to fail and go into
recovery.public void snapshotState(StateSnapshotContext context) throws Exception
AbstractStreamOperatorsnapshotState in interface StreamOperatorStateHandler.CheckpointedStreamOperatorsnapshotState in class AbstractStreamOperator<CompactorRequest>context - context that provides information and means required for taking a snapshotExceptionpublic void initializeState(StateInitializationContext context) throws Exception
AbstractStreamOperatorinitializeState in interface StreamOperatorStateHandler.CheckpointedStreamOperatorinitializeState in class AbstractStreamOperator<CompactorRequest>context - context that allows to register different states.ExceptionCopyright © 2014–2024 The Apache Software Foundation. All rights reserved.