@Internal public class CompactCoordinator extends AbstractStreamOperator<CompactorRequest> implements OneInputStreamOperator<CommittableMessage<FileSinkCommittable>,CompactorRequest>, BoundedOneInput
All committable emitted from the writers are collected and packed into
FileCompactStrategy defines when the requests can be fired. When
a firing condition is met, the requests will be sent to 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|
|Modifier and Type||Method and Description|
It is notified that no more data will arrive from the input.
Stream operators with state which can be restored need to override this hook method.
This method is called when the operator should do a snapshot, before it emits its own checkpoint barrier.
Processes one element that arrived on this input of the
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, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, open, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, registerCounterOnOutput, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
close, finish, getMetricGroup, getOperatorID, initializeState, open, setKeyContextElement1, setKeyContextElement2, snapshotState
processLatencyMarker, processWatermark, processWatermarkStatus
public CompactCoordinator(FileCompactStrategy strategy, SimpleVersionedSerializer<FileSinkCommittable> committableSerializer)
public void processElement(StreamRecord<CommittableMessage<FileSinkCommittable>> element) throws Exception
MultipleInputStreamOperator. This method is guaranteed to not be called concurrently with other methods of the operator.
public void endInput() throws Exception
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
NOTE: Given it is semantically very similar to the
method. It might be dropped in favour of the other method at some point in time.
public void prepareSnapshotPreBarrier(long checkpointId) throws Exception
This 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.
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
context- context that provides information and means required for taking a snapshot
public void initializeState(StateInitializationContext context) throws Exception
context- context that allows to register different states.
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